题库网 (tiku.one)

 找回密码
 立即注册
上传图片附件

未使用图片

上传的图片会被应用到当前指针题目

 

   

小贴士: 允许的图片文件格式为: gif, jpg, jpeg, png, webp，上传完成后会在上方生成预览，用鼠标连续双击缩略图，或拖动缩略图，该图片就被绑定至本题，显示在题目下方

本次作答已使用

小贴士: 此栏目显示的是当前作答使用的所有图片，绑定到某一题目的图片同时会显示在该题目下方; 删除使用的图片会将其转移到<未使用图片>类别


习题练习：DC Circuits
本习题练习来源于题库网 (https://tiku.one)，是在线习题练习的打印版，您也可以访问本平台网站(https://tiku.one/)直接在线完成(注册并登录账号后在首页左侧输入试卷号 617 即可在线作答)，，作答电子化后可随时回放，查看每题答案与详细解析，搜藏保存任意题目；教师使用本平台可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力。本试卷的直接作答链接 https://tiku.one/test617.html
 作者: 王信东Wood  发布日期: 2025-05-16 08:25    总分: 111分  得分: _____________

答题人: 匿名未登录  开始时间: 05月16日 08:25  切换到: 单题模式

标记此题
1#
 
问答题 ( 1.0 分) 切至单题模式 搜藏此题  
Explain why birds can sit on power lines safely, whereas leaning a metal 0 )jaj47t2 ofmokizc 1ladder up against a power line to fetch a stuck kite is extremely danotzifj4)ajkco27 1m0gerous.
参考答案:    

标记此题
2#
 
问答题 ( 1.0 分) 切至单题模式 搜藏此题  
Discuss the advantages and disadvuj8c.nl. fvnirz6dj b1 y4u.3 antages of Christmas tree lights connected in parallel versus those connected ij4nybnzf l1 3urcd .jv8 u6..in series.
参考答案:    

标记此题
3#
 
问答题 ( 1.0 分) 切至单题模式 搜藏此题  
If all you have is a 120-V line, would it be possible to light several 6-V lamps1mysuh.+1 y+w+pf vee without burning them out? How?ew upm+hv1y +y.+es1f
参考答案:    

标记此题
4#
 
问答题 ( 1.0 分) 切至单题模式 搜藏此题  
Two lightbulbs of resistani3v1xws -n3ia ce $R_1$ and $R_2(R_2>R_1)$ are connected in series. Which is brighter? What if they are connected in parallel? Explain.
参考答案:    

标记此题
5#
 
问答题 ( 1.0 分) 切至单题模式 搜藏此题  
Household outlets are often double outlets. Are these connected insizf2, mu (f;q series or parallel? Hofzuf sm;q,(i 2w do you know?
参考答案:    

标记此题
6#
 
问答题 ( 1.0 分) 切至单题模式 搜藏此题  
With two identical lightbulbs and two identical bate+r +hwc g3iv)teries, how would you arrange the bulbs and bat heg 3vc)+w+riteries in a circuit to get the maximum possible total power out? (Assume the batteries have negligible internal resistance.)
参考答案:    

标记此题
7#
 
问答题 ( 1.0 分) 切至单题模式 搜藏此题  
If two identical resistors are connected in series to a battery, does the b5jz 6jlq8obm 5attery have to supply more power or less power than when only one of the resistors is connected? Explainbl 8 q5jz6o5mj.
参考答案:    

标记此题
8#
 
问答题 ( 1.0 分) 切至单题模式 搜藏此题  
You have a single 60-W bulb *ocar*bssw g0du g zq)74 x2+eon in your room. How does the overall resistance of your room’s electric circuit change wusrgw4b e z7 *o ag)*c+dq0s2xhen you turn on an additional 100-W bulb?
参考答案:    
本习题练习全部题目来源于题库网 (https://tiku.one)，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力
标记此题
9#
 
问答题 ( 1.0 分) 切至单题模式 搜藏此题  
When applying Kirchhoff’s loop rule (such as in Fig. Below), does the sh;gnm( fqt 4inv6+crv5kwc( 0ign (or dw;gi5c+ mvr(hqvt0knfcn (4 6irection) of a battery’s emf depend on the direction of current through the battery? What about the terminal voltage?

参考答案:    

标记此题
10#
 
填空题 ( 1.0 分) 切至单题模式 搜藏此题  
  Given the circuit shown in Fig. 0 we1 k3i+bcun+q0cs -g-pe om19–36, use the words “increases,” “decreases,” or “stays the same” to complete the following stampgew bn0cq +s3ku +o1i -ce0-tements:
(a) If $R_7$ increases, the potential difference between A and E   . Assume no resistance in Ann meter and power supply.
(b) If $R_7$ increases, the potential difference between A and E   . Assume Ann meter and power supply have resistance.
(c) If $R_7$ increases, the voltage drop across $R_4$   .
(d) If $R_2$ decreases, the current through $R_1$   .
(e) If $R_2$ decreases, the current through $R_6$   .
(f) If $R_2$ decreases, the current through $R_3$   .
(g) If $R_5$ increases, the voltage drop across $R_2$   .
(h) If $R_5$ increases, the voltage drop across $R_4$   .
(i) If $R_2$,$R_5$, and $R_7$ increase, power supply (r = 0)   .



参考答案:     查看本题详细解析

标记此题
11#
 
问答题 ( 1.0 分) 切至单题模式 搜藏此题  
For what use are batteries connected in series? For what us 6o-hek; ejf/pe are they connected in parallel? Does it matter if the batteries are nearly identip/k-of eej 6;hcal or not in either case?
参考答案:    

标记此题
12#
 
问答题 ( 1.0 分) 切至单题模式 搜藏此题  
Can the terminal voltage of a battery ever exceed its emf? E vp-( zt k:lw0mzey3x6xplain.
参考答案:    

标记此题
13#
 
问答题 ( 1.0 分) 切至单题模式 搜藏此题  
Explain in detail how you could measure the internal resistance of a b q318 wt k1,wai s0evh jlgxd;,sw+k qy5y8mc6attery.
参考答案:    

标记此题
14#
 
问答题 ( 1.0 分) 切至单题模式 搜藏此题  
Compare and discuss the formulas for resistors and for capacitors whenmc:1;pe fqdq, connected in series and in,qcf;1:m eqp d parallel.
参考答案:    

标记此题
15#
 
问答题 ( 1.0 分) 切至单题模式 搜藏此题  
Suppose that three identical capacitors ayumi;pa. ; w6e*n v i.zq jkmin92v7.ere connected to a battery. Will they store moj7eeui9 .;nz; 2piva6vw nqyi k mm.*.re energy if connected in series or in parallel?
参考答案:    

标记此题
16#
 
问答题 ( 1.0 分) 切至单题模式 搜藏此题  
Why is it more dangerous to turn on an electric appliance when youu-q bpf1g5njq0u04i i *vwbr0 are standing outside in bare feet than when you are inside wearing shoes wn05 ui0jiuwbb*p- 1qrf 04 vgqith thick soles?
参考答案:    

标记此题
17#
 
问答题 ( 1.0 分) 切至单题模式 搜藏此题  
(Fig. Below) is a diagram of a capacitor (or condenser) microph8ao k+we1w s1ouetri0s 4l4* done. The changing air pressure in a sound wave causes one plate of the capacitor C to move blt 0k so4e*erw+d81i wo4aus1ack and forth. Explain how a current of the same frequency as the sound wave is produced.
参考答案:    
本习题练习全部题目来源于题库网 (https://tiku.one)，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力
标记此题
18#
 
问答题 ( 1.0 分) 切至单题模式 搜藏此题  
Design a circuit in which two different switches of the type sd6hf6oyz) tclpp,6.:o; ih:t1aijs ihown in (Fig. Below) can be used to operate the same lijt si:htai i:p lhd6;of,yo66.c )zp1ghtbulb from opposite sides of a room.
参考答案:    
本习题练习全部题目来源于题库网 (https://tiku.one)，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力
标记此题
19#
 
问答题 ( 1.0 分) 切至单题模式 搜藏此题  
In an RC circuit, current flows from the battery until the capaxj(bkaw d4*xsng+( y7(a *ofk citor is completely charged. Is the total energy supplied by the batte wf* d 74(axkxkj +n(o(y*gsbary equal to the total energy stored by the capacitor? If not, where does the extra energy go?
参考答案:    

标记此题
20#
 
问答题 ( 1.0 分) 切至单题模式 搜藏此题  
What is the main differenceu:c+b 5vkj(srdfy/ o t./)qoc between an analog voltmeter and an analog ammeter?
参考答案:    

标记此题
21#
 
问答题 ( 1.0 分) 切至单题模式 搜藏此题  
What would happen if you mistakenly used an ammeter wher2. cm:n1glpc-8 ltguxpb9:pqsznc /,e you needed to use a voltmecg ,8bp/c:us cz2.gl:91ppmq-xnl tn ter?
参考答案:    

标记此题
22#
 
问答题 ( 1.0 分) 切至单题模式 搜藏此题  
Explain why an ideal ammeter would have zero resistance and an idealvz.ppfnu y 1;3 voltmeter infinite resistaz1v 3y;n fp.punce.
参考答案:    

标记此题
23#
 
问答题 ( 1.0 分) 切至单题模式 搜藏此题  
A voltmeter connected across a resistor always reads less * py6 ffc1iuil5o*p ,0g1bjvythan the actual voltage across the resistor when the meter is not pvuii*ypj yb1o 5 c ,fp*1fg0l6resent. Explain.
参考答案:    

标记此题
24#
 
问答题 ( 1.0 分) 切至单题模式 搜藏此题  
A small battery-operated flashlight requires a single 1.5-V battery. The bulb i;yx zc(a2n7-cfcnh 8x s barely glowing, but when yo - (cah2cx8n;x fy7zcnu take the battery out and check it with a voltmeter, it registers 1.5 V. How would you explain this?
参考答案:    
本习题练习全部题目来源于题库网 (https://tiku.one)，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力
标记此题
25#
 
填空题 ( 1.0 分) 切至单题模式 搜藏此题  
  Calculate the terminal voltage for a battery withk blmfk0x4m19if- fc7 an internal resistance of $0.900\Omega$ and an emf of $8.50\,V$ when the battery is connected in series with
(a) an $81.0-\Omega$ resistor,    V
(b) an $810-\Omega$ resistor.    V

参考答案:     查看本题详细解析

标记此题
26#
 
填空题 ( 1.0 分) 切至单题模式 搜藏此题  
  Four $1.5-V$ cells are connected in series to a $12-\Omega$ lightbulb. If the resulting current is $0.45\,A$, what is the internal resistance of each cell, assuming they are identical and neglecting the wires?    $\Omega$

参考答案:     查看本题详细解析

标记此题
27#
 
填空题 ( 1.0 分) 切至单题模式 搜藏此题  
  What is the internal resistance of7 ik6od fc)y0 l sjhf1o-d7s6t a $12.0-V$ car battery whose terminal voltage drops to $8.4\,V$
when the starter draws $75\,A$?    $\Omega$
What is the resistance of the starter?    $\Omega$

参考答案:     查看本题详细解析
本习题练习全部题目来源于题库网 (https://tiku.one)，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力
标记此题
28#
 
填空题 ( 1.0 分) 切至单题模式 搜藏此题  
  A $1.5-V$ dry cell can be tested by connecting it to a low-resistance ammeter. It should be able to supply at least $22\,A$. What is the internal resistance of the cell in this case, assuming it is much greater than that of the ammeter?    $\Omega$

参考答案:     查看本题详细解析

标记此题
29#
 
填空题 ( 1.0 分) 切至单题模式 搜藏此题  
  Four $240-\Omega$ lightbulbs are connected in series.
What is the total resistance of the circuit?    $\Omega$
What is their resistance if they are connected in parallel?    $\Omega$

参考答案:     查看本题详细解析

标记此题
30#
 
填空题 ( 1.0 分) 切至单题模式 搜藏此题  
  Three $45-\Omega$ lightbulbs and three $75-\Omega$ lightbulbs are connected in series.
(a) What is the total resistance of the circuit?    $\Omega$
(b) What is their resistance if all six are wired in parallel?    $\Omega$

参考答案:     查看本题详细解析

标记此题
31#
 
填空题 ( 1.0 分) 切至单题模式 搜藏此题  
  A $650-\Omega$ and a $2200-\Omega$ resistor are connected in series with a $12-V$ battery. What is the voltage across the $2200-\Omega$ resistor?    V

参考答案:     查看本题详细解析

标记此题
32#
 
填空题 ( 1.0 分) 切至单题模式 搜藏此题  
  Given only one $25-\Omega$ and one $35-\Omega$ resistor, list all possible values of resistance that can be obtained.    $\Omega$    $\Omega$    $\Omega$    $\Omega$

参考答案:     查看本题详细解析

标记此题
33#
 
填空题 ( 1.0 分) 切至单题模式 搜藏此题  
  Suppose that you have0zp+dob t-4zsv t;)a r a $680-\Omega$, a $940-\Omega$ and a $1.20-k\Omega$ resistor. What is
(a) the maximum,    $\Omega$
(b) the minimum resistance you can obtain by combining these?    $\Omega$

参考答案:     查看本题详细解析

标记此题
34#
 
问答题 ( 1.0 分) 切至单题模式 搜藏此题  
Suppose that you have a (8+k1ok kw)tz5 qovjb$6.0-V$ battery and you wish to apply a voltage of only $4.0\,V$. Given an unlimited supply of $1.0-\Omega$ resistors, how could you connect them so as to make a “voltage divider” that produces a $4.0-V$ output for a $6.0-V$ input?
参考答案:    

标记此题
35#
 
填空题 ( 1.0 分) 切至单题模式 搜藏此题  
  Three $240-\Omega$ resistors can be connected together in four different ways, making combinations of series and/or parallel circuits. What are these four ways, and what is the net resistance in each case?
The resistors can all be connected in series   $\Omega$
The resistors can all be connected in parallel.   $\Omega$
Two resistors in series can be placed in parallel with the third.   $\Omega$
Two resistors in parallel can be placed in series with the third.    $\Omega$

参考答案:     查看本题详细解析

标记此题
36#
 
填空题 ( 1.0 分) 切至单题模式 搜藏此题  
  A battery with an emf of:qc(.0gk7 b jewls,lbh-a iy1 $12.0\,V$ shows a terminal voltage of $11.8\,V$ when operating in a circuit with two lightbulbs rated at $3.0\,W$ (at $12.0\,V$) which are connected in parallel. What is the battery’s internal resistance?    $\Omega$

参考答案:     查看本题详细解析

标记此题
37#
 
填空题 ( 1.0 分) 切至单题模式 搜藏此题  
  Eight identical lights are connected in+3j *2a wyabnxn )d,xf series across a $110-V$ line.
(a) What is the voltage across each bulb? V$\approx$    V(Round to the nearest integer)
(b) If the current is $0.50\,A$, what is the resistance of each bulb, and what is the power dissipated in each?
R $\approx$    $\Omega$(Round to the nearest integer)
P $\approx$    W(retain one decimal places)

参考答案:     查看本题详细解析

标记此题
38#
 
填空题 ( 1.0 分) 切至单题模式 搜藏此题  
  Eight lights are connected in paralleu9 +sx ue1 f-pgwobqs12b -a/il to a $110-V$ source by two long leads of total resistance $1.6-\Omega$. If $240\,mA$ flows through each bulb, what is the resistance of each, and what fraction of the total power is wasted in the leads?$V_R $    $\Omega$   

参考答案:     查看本题详细解析

标记此题
39#
 
填空题 ( 1.0 分) 切至单题模式 搜藏此题  
  Eight $7.0-W$ Christmas tree lights are connected in series to each other and to a $110-V$ source. What is the resistance of each bulb?    $ \Omega$

参考答案:     查看本题详细解析

标记此题
40#
 
填空题 ( 1.0 分) 切至单题模式 搜藏此题  
  A close inspection of an electric circuit re6fc q8fh kc8s) f1d0dmveals that a $480-\Omega$ resistor was inadvertently soldered in the place where a $320-\Omega$ resistor is needed. How can this be fixed without removing anything from the existing circuit?    $\Omega$

参考答案:     查看本题详细解析
本习题练习全部题目来源于题库网 (https://tiku.one)，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力
标记此题
41#
 
填空题 ( 1.0 分) 切至单题模式 搜藏此题  
  Determine
(a) the equivalent resistance of the circuit shown in (Fig. Below),
$R_{eq}$   $\Omega$
$V_{470}$    V
(b) the voltage across each resistor. $V_{parallel}$    V



参考答案:     查看本题详细解析

标记此题
42#
 
填空题 ( 1.0 分) 切至单题模式 搜藏此题  
  A $75-W$, $110-V$ bulb is connected in parallel with a 40-W, 110-V bulb. What is the net resistance?    $\Omega$(Round to the nearest integer)

参考答案:     查看本题详细解析

标记此题
43#
 
填空题 ( 1.0 分) 切至单题模式 搜藏此题  
  Consider the network oh/c-t;/.zmri izl(w l f resistors shown in (Fig. Below). Answer qualitatively: zmi lc(.i-l h zrw;//t
(a) What happens to the voltage across each resistor when the switch S is closed? $V_1$    $V_2$    $V_3$    $V_4$   
(b) What happens to the current through each when the switch is closed? $V_1$    $V_2$    $V_3$    $V_4$   
(c) What happens to the power output of the battery when the switch is closed?   
(d) Let $R_1=R_2=R_3=R_4=125\Omega$ and $V\,=\,22.0\,V$. Determine the current through each resistor before and after closing the switch. Are your qualitative predictions confirmed? Notice that the current through each of the parallel resistors is half of the total current, within the limits of significant figures. $I_1$    A $I_3$    A $I_4$    A Notice that the current through each of the parallel resistors is one third of the total current, within the limits of significant figures.$I_1$    A $I_2$    A $I_3$    A $I_4$    A   



参考答案:     查看本题详细解析

标记此题
44#
 
填空题 ( 1.0 分) 切至单题模式 搜藏此题  
  What is the net resistance of the me(qu()7 xw)a 6rgnzdcircuit connected to the battery in (Fig. Below)? Each rx)e6z7u(g n warm)dq(esistance has $R\,=\,2.8K\Omega$.   k$\Omega$(retain one decimal places)


参考答案:     查看本题详细解析

标记此题
45#
 
填空题 ( 1.0 分) 切至单题模式 搜藏此题  
  Three equal resistors (R) are connected to a battery as shown in (Fig. Belqfqks,e/hoylon7:l5+2 t 9rc ow). Qualitatively, what happensqr: / l,2 c+ykoefnqol 7sh95t to
(a) the voltage drop across each of these resistors, $V_{left}$    $V_{right}$    $V_{right}$   
(b) the current flow through each, $I_{left}$    $I_{right}$    $I_{right}$   
(c) the terminal voltage of the battery, when the switch S is opened, after having been closed for a long time? terminal voltage   
(d) If the emf of the battery is 15.0 V, what is its terminal voltage when the switch is closed if the internal resistance is $0.50\Omega$ and $R\,=\,5.5\Omega$?
$V_{terminal\,closed}$    V
(e) What is the terminal voltage when the switch is open? $V_{terminal\,closed}$    V



参考答案:     查看本题详细解析
本习题练习全部题目来源于题库网 (https://tiku.one)，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力
标记此题
46#
 
填空题 ( 1.0 分) 切至单题模式 搜藏此题  
  A $2.8-k\Omega$ and a $2.1-k\Omega$ resistor are connected in parallel; this combination is connected in series with a $1.8-k\Omega$ resistor. If each resistor is rated at $\frac{1}{2}W$ (maximum without overheating), what is the maximum voltage that can be applied across the whole network?    V

参考答案:     查看本题详细解析

标记此题
47#
 
填空题 ( 1.0 分) 切至单题模式 搜藏此题  
  Calculate the current in the p fl7gvyhxsi+s+)u cu; u /m o30,,ejocircuit of (Fig. Below) and show that the sum of all the voltage/lux yfgs3 h,ooej+i0 )uumc v+p;7s, changes around the circuit is zero.
I $\approx$    A(retain two decimal places)
$\sum$    V


参考答案:     查看本题详细解析

标记此题
48#
 
填空题 ( 1.0 分) 切至单题模式 搜藏此题  
  Determine the terminal voltage of each battery in (Fig. Below). 1f3bh(xxaay bkn/): t(8V battery    V 12V battery    V


参考答案:     查看本题详细解析

标记此题
49#
 
填空题 ( 1.0 分) 切至单题模式 搜藏此题  
  (a) What is the potential difference between points a and d in (Fig. Below abx5o*g6ub s92y toz 826ynmpw) (same circuit as Fig. Below b, )p8*wu ob mxby522oz6ty6g9 ns, $V_{ad}$    V
(b) what is the terminal voltage of each battery?
80V battery    V
45V battery    V

a
b

参考答案:     查看本题详细解析
本习题练习全部题目来源于题库网 (https://tiku.one)，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力
标记此题
50#
 
填空题 ( 1.0 分) 切至单题模式 搜藏此题  
  For the circuit shown in (Fig. Below), find the potentifd+)l :zm6mqm al difference between points a and b. Ea+)f6 d mzlm:mqch resistor has $R\,=\,75\Omega$ and each battery is 1.5 V.    V


参考答案:     查看本题详细解析

标记此题
51#
 
填空题 ( 1.0 分) 切至单题模式 搜藏此题  
  Determine the magnitudes and directions x4-b 60gtxed) q1h c wb:nsjc:of the currents through $R_1$ and $R_2$ in (Fig. Below). $I_1$    A    $I_2$    A   


参考答案:     查看本题详细解析

标记此题
52#
 
填空题 ( 1.0 分) 切至单题模式 搜藏此题  
  Repeat Problem 27, now assuming tt1) pegdu5 +pohat each battery has an internal resistance $r\,=\,1.2\Omega$.
$I_1$ $\approx$    A   (retain two decimal places)
$I_2$ $\approx$    A    (retain two decimal places)
$I_3$ $\approx$    A    (retain two decimal places)

参考答案:     查看本题详细解析

标记此题
53#
 
填空题 ( 1.0 分) 切至单题模式 搜藏此题  
  Determine the magnitudes and doc93xqc x:op )irections of the currents in each resistor shown in (Fig. Below). qxp 39oco)c :xThe batteries have emfs of $E_1\,=\,9.0V$ and $E_2\,=\,12.0V$ and the resistors have values of $R_1\,=\,25\Omega$,$R_2\,=\,18\Omega$, and $R_3\,=\,35\Omega$
$I_1$ $\approx$    A   (retain two decimal places)
$I_2$ $\approx$    A    (retain two decimal places)
$I_3$ $\approx$    A    (retain two decimal places)


参考答案:     查看本题详细解析
本习题练习全部题目来源于题库网 (https://tiku.one)，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力
标记此题
54#
 
填空题 ( 1.0 分) 切至单题模式 搜藏此题  
  Repeat Problem 29, assuming each battery hau peomk.d.npov(1 30b t-2 hubs internal resistance $r\,=\,1.0\Omega$.
$I_1$ $\approx$    A   (retain two decimal places)
$I_2$ $\approx$    A    (retain two decimal places)
$I_3$ $\approx$    A    (retain two decimal places)

参考答案:     查看本题详细解析

标记此题
55#
 
填空题 ( 1.0 分) 切至单题模式 搜藏此题  
  Calculate the currents in each resistor of Fig. *ijizij r(+ b1hm u(yvd;4t x*19–49.
$2\Omega$    A
$6\Omega$    A
$8\Omega$    A
$10\Omega$    A
$12\Omega$    A

参考答案:     查看本题详细解析

标记此题
56#
 
填空题 ( 1.0 分) 切至单题模式 搜藏此题  
  (a) Determine the currents11 c oiy0fb)qgvyjx 6 es6 wo 6-8wuo0)obj;jm $I_1$,$I_2$, and $I_3$ in (Fig. Below). Assume the internal resistance of each battery is $r\,=\,1.0\Omega$$I_1$ $\approx$    A(retain two decimal places)
$I_2$ $\approx$    A (retain two decimal places)
$I_3$ $\approx$    A (retain three decimal places)
(b) What is the terminal voltage of the 6.0-V battery? $V_{terminal}$    V


参考答案:     查看本题详细解析

标记此题
57#
 
填空题 ( 1.0 分) 切至单题模式 搜藏此题  
  What would the current pmezi +cy;dz;arc,g)i97c: 3(vbyqj$I_1$ be in (Fig. Below) if the $12-\Omega$ resistor is shorted out? Let $r\,=\,1.0\Omega$. $I_1$    A


参考答案:     查看本题详细解析

标记此题
58#
 
填空题 ( 1.0 分) 切至单题模式 搜藏此题  
  Suppose two batteries, with unequal emfs of 2.00 V and 3.00 V, anl:9aqzm)v, w qz (rd*re connected as shown in (Fig. Below). If each intemnz:*a,lv d )(zqrw9qrnal resistance is $r\,=\,0.100\Omega$ and $R\,=\,4.00\Omega$, what is the voltage across the resistor R? $V_R$ $\approx$    V (retain two decimal places)



参考答案:     查看本题详细解析

标记此题
59#
 
填空题 ( 1.0 分) 切至单题模式 搜藏此题  
  (a) Six $4.7-\mu F$ capacitors are connected in parallel. What is the equivalent capacitance? $C_{eq}$ =    $\mu F$
(b) What is their equivalent capacitance if connected in series? $C_{eq}$ =    $\mu F$

参考答案:     查看本题详细解析

标记此题
60#
 
填空题 ( 1.0 分) 切至单题模式 搜藏此题  
  You have three capacitors. 7rur fdd34 ilx;lev;ost*,x/al aa., of capacitance 3200 pF, 7500 pF, and $0.0100\mu F$ . What maximum and minimum capacitance can you form from these? How do you make the connection in each case?
$C_{max}$ =    $ \times10^{-8 }\;F$ in   
$C_{min}$ =    $ \times10^{-9 }\;F$ in   

参考答案:     查看本题详细解析

标记此题
61#
 
填空题 ( 1.0 分) 切至单题模式 搜藏此题  
  A $3.00-\mu F$ and a $4.00-\mu F$ capacitor are connected in series, and this combination is connected in parallel with a $2.00-\mu F$ capacitor (see Fig. Below). What is the net capacitance? $C_{eq}$ =    $\mu F$


参考答案:     查看本题详细解析

标记此题
62#
 
填空题 ( 1.0 分) 切至单题模式 搜藏此题  
  If 26.0 V is applied across the whole net /qxo6pl 7m8vqt:/ kai*lot0 qwork of (Fig. Below), calculate the voltagpm7/ o *6oktaq0qt8l:vxqil / e across each capacitor.
$V_{2.00}$    V
$V_{3.00}$    V
$V_{4.00}$    V



参考答案:     查看本题详细解析

标记此题
63#
 
填空题 ( 1.0 分) 切至单题模式 搜藏此题  
  The capacitance of a portion of a circuit is to be reduced from 4800ce3j: xith/e k1jxqtv3( 7b 1z pF to 2900 pF. /3jq txj 7th3c 1ixbz: (1ekve
What capacitance can be added to the circuit to produce this effect without removing existing circuit elements?    $ \times10^{ -9}\;F$
Must any existing connections be broken in the process?   

参考答案:     查看本题详细解析
本习题练习全部题目来源于题库网 (https://tiku.one)，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力
标记此题
64#
 
填空题 ( 1.0 分) 切至单题模式 搜藏此题  
  An electric circuit )5sw n1aj(,v cl7fustwas accidentally constructed using a $5.0-\mu F$ capacitor instead of the required $16-\mu F$ value. Without removing the $5.0-\mu F$ capacitor, what can a technician add to correct this circuit?    $\mu F$ conneected in   

参考答案:     查看本题详细解析

标记此题
65#
 
问答题 ( 1.0 分) 切至单题模式 搜藏此题  
Determine the equivalent capacitance of the circuit shown in fdwknva+k2 reeq fd-;j/ ;26y (Fig. Below).
参考答案:    

标记此题
66#
 
填空题 ( 1.0 分) 切至单题模式 搜藏此题  
  In (Fig. Below), if 1sp ct q:l,bi1)f:zt9h (zwye$C_1=C_2=2C_3=22.6\mu F$, how much charge is stored on each capacitor when $V\,=\,45.0V$?
$Q_1$   $ \times10^{-3 }\;C$
$Q_2$   $ \times10^{-4 }\;C$
$Q_3$   $ \times10^{-4 }\;C$



参考答案:     查看本题详细解析
本习题练习全部题目来源于题库网 (https://tiku.one)，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力
标记此题
67#
 
填空题 ( 1.0 分) 切至单题模式 搜藏此题  
  In (Fig. Below), suppo m9e 7tg*gz3+dsk2wadz 3r pa+xo+n;u se $C_1=C_2=2C_3=16.0\mu F$, If the charge on $C_2$ is $Q_2\,=\,24.0\,\mu C$, determine the charge on each of the other capacitors, the voltage across each capacitor, and the voltage V across the entire combination.
$ Q_{1}$ =    $\mu C$, $V_{1}$=   V
$ Q_{2}$ =    $\mu C$, $ V_{2}$=    V
$ Q_{3}$ =   $\mu C$, $ V_{3}$=    V
V=    V


参考答案:     查看本题详细解析

标记此题
68#
 
填空题 ( 1.0 分) 切至单题模式 搜藏此题  
  In (Fig. Below), let al t (fp;e:)x0h ufz8h7tnf/ m$V\,=\,78V$ and $C_1=C_2=2C_3=7.2\mu F$. How much energy is stored in the capacitor network?    $ \times10^{-2 }\;J$


参考答案:     查看本题详细解析

标记此题
69#
 
填空题 ( 1.0 分) 切至单题模式 搜藏此题  
  A $0.40-\mu F$ and a $0.60-\mu F$ capacitor are connected in series to a 9.0-V battery. Calculate
(a) the potential difference across each capacitor,
$V_1$    V
$V_2$    V
(b) the charge on each. $Q_1$    $ \times10^{-6 }\;C$
(c) Repeat parts (a) and (b) assuming the two capacitors are in parallel.
$V_1$    V
$V_2$    V
$Q_1$    $ \times10^{-6 }\;C$
$Q_2$    $ \times10^{-6 }\;C$

参考答案:     查看本题详细解析

标记此题
70#
 
问答题 ( 1.0 分) 切至单题模式 搜藏此题  
Three conducting plates, 0v -3-sgt 9wo ax6 rvyrwh81mveach of area A, are connected as shown in (Fig. Below). -tvwr-rv ym3aw18 vhso 0x6g9
(a) Are the two capacitors formed connected in series or in parallel?
(b) Determine C as a function of $d_1$,$d_2$, and A. Assume $d_1+d_2$ is much less than the dimensions of the plates.
参考答案:    
本习题练习全部题目来源于题库网 (https://tiku.one)，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力
标记此题
71#
 
填空题 ( 1.0 分) 切至单题模式 搜藏此题  
  A circuit contains a single 250-pF capacitor hooked acrosseaid(dgu42h2b : l:(m xz4mdw,y- pfp a battery. It is desired to store three times as:,y2 lw px4(pm mdf ze2b:d -dghi(u4a much energy in a combination of two capacitors by adding a single capacitor to this one.
How would you hook it up?  
what would its value be?    pF

参考答案:     查看本题详细解析

标记此题
72#
 
填空题 ( 1.0 分) 切至单题模式 搜藏此题  
  A 185-pF capacitor is connected in series with an unknown capacitance, and az+me6h)upd i. z;i 1bts a series combination they are connected to a battery with an emf of 25.0 V. If the 185-pF capacitor stores 125 pC om. bh) +edzu6i;z1pi tf charge on its plates, what is the unknown capacitance?    pF

参考答案:     查看本题详细解析

标记此题
73#
 
填空题 ( 1.0 分) 切至单题模式 搜藏此题  
  Electrocardiographs are often connected as shown fm2rllosenakixd2 e+agyfxm- 549*h.l(j70 in (Fig. Below). The leads are said to be capacitively coupled. A time constant of 3.0 s is typical an2-2aykl + dm5 lrgloj(*mfaefse409h n.xi x7d allows rapid changes in potential to be recorded accurately. If $C\,=\,3.0\mu F$, what value must R have? [Hint: consider each leg as a separate circuit.]    $ \times10^{6 }\;\Omega$


参考答案:     查看本题详细解析

标记此题
74#
 
填空题 ( 1.0 分) 切至单题模式 搜藏此题  
  In Fig. Below a (same as Fig. Below b), the orkc)(;fdu kp)o m*q3total resistance is $15.0k\Omega$, and the battery’s emf is 24.0 V. If the time constant is measured to be $35.0\mu s$, calculate
(a) the total capacitance of the circuit    $ \times10^{-9 }\;F$
(b) the time it takes for the voltage across the resistor to reach 16.0 V after the switch is closed.    $ \times10^{-5 }\;s$

a
b

参考答案:     查看本题详细解析
本习题练习全部题目来源于题库网 (https://tiku.one)，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力
标记此题
75#
 
填空题 ( 1.0 分) 切至单题模式 搜藏此题  
  The RC circuit of Fig. Below a (same as Fig. Belowx bo wd7xvl4.*kzz(;; i57z2frfvbp f b) has $R\,=\,6.7k\Omega$ and $C\,=\,3.0\,\mu F$. The capacitor is at voltage $V_0$ at $t=0$. when the switch is closed. How long does it take the capacitor to discharge to 1.0% of its initial voltage?    $ \times10^{ -2}\;s$
a
b

参考答案:     查看本题详细解析

标记此题
76#
 
填空题 ( 1.0 分) 切至单题模式 搜藏此题  
  Two resistors and two uncharged capacitors are arranged ap8 v4olwfa,w0mv.*a ms shown in (Fig. Below). Then a potential dif v*4,8mf. a0 lwpvoamwference of 24 V is applied across the combination as shown.
(a) What is the potential at point a with switch S open? (Let $V=0$ at the negative terminal of the source.)    V
(b) What is the potential at point b with the switch open?    V
(c) When the switch is closed, what is the final potential of point b?    V
(d) How much charge flows through the switch S after it is closed?    $\mu F$


参考答案:     查看本题详细解析

标记此题
77#
 
填空题 ( 1.0 分) 切至单题模式 搜藏此题  
  What is the resistance of a voltmeteerb4 wr oq43u1:q;lno r on the 250-V scale if the meter sensitivity ieuq rr:qo14 lw 34n;obs $30,000\,\Omega/V$?    $ \times10^{6 }\;\Omega$

参考答案:     查看本题详细解析

标记此题
78#
 
填空题 ( 1.0 分) 切至单题模式 搜藏此题  
  An ammeter has a sensitivitggnp2e. hjf-/n)kc1z y of $20,000\,\Omega/V$? What current in the galvanometer produces full-scale deflection?    $\mu A$

参考答案:     查看本题详细解析
本习题练习全部题目来源于题库网 (https://tiku.one)，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力
标记此题
79#
 
填空题 ( 1.0 分) 切至单题模式 搜藏此题  
  A galvanometer has an internal resim*5v2qc,llz: yb rqj 9stance of $30\Omega$ and deflects full scale for a $50-\mu A$ current. Describe how to use this galvanometer to make
(a) an ammeter to read currents up to 30 A,    $ \times10^{-5 }\;\Omega$
(b) a voltmeter to give a full-scale deflection of 250 V.    $ \times10^{6 }\;\Omega$

参考答案:     查看本题详细解析
本习题练习全部题目来源于题库网 (https://tiku.one)，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力
标记此题
80#
 
填空题 ( 1.0 分) 切至单题模式 搜藏此题  
  A galvanometer has a sensitiv(7 wxc,vunbl:uq+-y r ity of $35k\Omega/V$ and internal resistance $20.0\Omega$. How could you make this into
(a) an ammeter that reads 2.0 A full scale,
   $ \times10^{-4 }\;\Omega$ in
  
(b) a voltmeter reading 1.00 V full scale?
   k$\Omega$
  

参考答案:     查看本题详细解析

标记此题
81#
 
填空题 ( 1.0 分) 切至单题模式 搜藏此题  
  A milliammeter reads(mmzj 7(us )k:a3lo-( eko6tlpl e+r2y w x:dj 10 mA full scale. It consists of a $0.20-\Omega$ resistor in parallel with a $33-\Omega$ galvanometer. How can you change this ammeter to a voltmeter giving a full-scale reading of 10 V without taking the ammeter apart? What will be the sensitivity ($\Omega/V$) of your voltmeter?
$R_{ser}$ $\approx$    $\Omega$(Round to the nearest integer)
The sensitivity is    $\Omega/V$

参考答案:     查看本题详细解析

标记此题
82#
 
填空题 ( 1.0 分) 切至单题模式 搜藏此题  
  A 45-V battery of negligible internal resistance is connecte ) 3y(h efup+-8ecdqapd to a $R_1$=$38-k\Omega$ and a $R_2$=$27-k\Omega$ resistor in series. What reading will a voltmeter, of internal resistance $95k\Omega$ give when used to measure the voltage across each resistor? What is the percent inaccuracy due to meter resistance for each case?
$V_1$$\approx$    V (retain one decimal places) % error    % too   
$V_2$$\approx$    V (Round to the nearest integer) % error    % too   

参考答案:     查看本题详细解析

标记此题
83#
 
填空题 ( 1.0 分) 切至单题模式 搜藏此题  
  An ammeter whose internal resistance is+bk.ne- )6m3,pc, vv/:wkyfkj guxlr $63\Omega$ reads 5.25 mA when connected in a circuit containing a battery and two resistors in series whose values are $750\Omega$ and $480\Omega$. What is the actual current when the ammeter is absent?    $ \times10^{ -3}\;A$

参考答案:     查看本题详细解析

标记此题
84#
 
填空题 ( 1.0 分) 切至单题模式 搜藏此题  
  A battery with $E\,=\,12.0V$ and internal resistance $r\,=\,1.0\Omega$ is connected to two $9.0-k\Omega$ resistors in series. An ammeter of internal resistance $0.50\Omega$ measures the current, and at the same time a voltmeter with internal resistance $15k\Omega$ measures the voltage across one of the $9.0-k\Omega$ resistors in the circuit. What do the ammeter and voltmeter read?
$I_{source}$   $ \times10^{ -4}\;A$
$V_{meter}$    V

参考答案:     查看本题详细解析

标记此题
85#
 
填空题 ( 1.0 分) 切至单题模式 搜藏此题  
  Two $9.4-k\Omega$ resistors are placed in series and connected to a battery. A voltmeter of sensitivity $1000\Omega/V$ is on the 3.0-V scale and reads 2.0 V when placed across either resistor. What is the emf of the battery? (Ignore its internal resistance.) $\approx$    V（Round to the nearest integer）

参考答案:     查看本题详细解析

标记此题
86#
 
填空题 ( 1.0 分) 切至单题模式 搜藏此题  
  What internal resistance should the voltmeter of Example 19–15 have to dlv2ua+ k u6b2be in error by less thankd+vul6 ba2u 2 3%? $\approx$    k$\Omega$

参考答案:     查看本题详细解析
本习题练习全部题目来源于题库网 (https://tiku.one)，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力
标记此题
87#
 
填空题 ( 1.0 分) 切至单题模式 搜藏此题  
  When the resistor R 1o/0sbbq3e 7rrhg:iw o 5.lyk in (Fig. Below) is $35\Omega$, the high-resistance voltmeter reads 9.7 V. When R is replaced by a $9.0-k\Omega$ resistor, the voltmeter reading drops to 8.1 V. What are the emf and internal resistance of the battery?
r $\approx$    $\Omega$(retain one decimal places)
$\varepsilon$ $\approx$   V(retain one decimal places)



参考答案:     查看本题详细解析

标记此题
88#
 
填空题 ( 1.0 分) 切至单题模式 搜藏此题  
  Suppose that you wish to apply a 0.25-V potential differbss t 3)h4oj(qence between two points on the humant4h)sj qobs(3 body. The resistance is about $2000\Omega$, and you only have a 9.0-V battery. How can you connect up one or more resistors to produce the desired voltage?    k$\Omega$

参考答案:     查看本题详细解析

标记此题
89#
 
填空题 ( 1.0 分) 切至单题模式 搜藏此题  
  A three-way lightbulb can produce 50 W, 10m lcm1t;pcp9x1 q4n2k0 W, or 150 W, at 120 V. Such a bulb contains two filaments that can be connected to the 120 V941c;tlqpxmncm 1p2 k individually or in parallel.
(a) Describe how the connections to the two filaments are made to give each of the three wattages.
50 W output use   
100 W output use   
150 W output use   
(b) What must be the resistance of each filament?
$R_{50W}$    $\Omega$
$R_{100W}$    $\Omega$

参考答案:     查看本题详细解析

标记此题
90#
 
填空题 ( 1.0 分) 切至单题模式 搜藏此题  
  Suppose you want to run somp**x(: h+cd .whsxqda)i 0o dfy 7.bafyo8lw +e apparatus that is 95 m from an electric outlet. Each of the wires connecting your apparatus to the 120-V source has a resistance per u ldwd7d(sa p x8i*+oh0ah+yfq* .o)xw:.y bc fnit length of $0.0065\Omega/m$. If your apparatus draws 3.0 A, what will be the voltage drop across the connecting wires and what voltage will be applied to your apparatus?
$V_{wires}$    V
the voltage applied to the apparatus is $\approx$    V(Round to the nearest integer)

参考答案:     查看本题详细解析
本习题练习全部题目来源于题库网 (https://tiku.one)，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力
标记此题
91#
 
填空题 ( 1.0 分) 切至单题模式 搜藏此题  
  Electricity can be a hazard in hospitals, particularly to pais4 t g,gy/x5htients who are connected to electrodes, such as an ECG. For example, suppose that the motor of a motorized bed shorts out to the bed frame, and the bed frame’s connection to a ground has broken (,gx5g y hi4t/sor was not there in the first place). If a nurse touches the bed and the patient at the same time, she becomes a conductor and a complete circuit can be made through the patient to ground through the ECG apparatus. This is shown schematically in Fig. 19–60. Calculate the current through the patient. $\approx$    $ \times10^{-3 }\;A$(retain three decimal places)


参考答案:     查看本题详细解析
本习题练习全部题目来源于题库网 (https://tiku.one)，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力
标记此题
92#
 
填空题 ( 1.0 分) 切至单题模式 搜藏此题  
  How much energy must a 45-V battery expend to charge a ml-ga*:p dg mzkkcwvqk5*r 7 x+203wk $0.40-\mu F$ and a $0.60-\mu F$ capacitor fully when they are placed
(a) in parallel,    $ \times10^{-3 }\;J$
(b) in series?    $ \times10^{-4 }\;J$
(c) How much charge flowed from the battery in each case?
$Q_a$    $\mu C$
$Q_b$ $\approx$    $\mu C$(Round to the nearest integer)

参考答案:     查看本题详细解析

标记此题
93#
 
填空题 ( 1.0 分) 切至单题模式 搜藏此题  
  A heart pacemaker is designed to operate at 72 beats/mikug(u8cpsuw 2q )p9vr5f kv8/ n using a $7.5-\mu F$ capacitor in a simple RC circuit. What value of resistance should be used if the pacemaker is to fire (capacitor discharge) when the voltage reaches 63% of maximum?    $ \times10^{-5 }\;\Omega$

参考答案:     查看本题详细解析
本习题练习全部题目来源于题库网 (https://tiku.one)，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力
标记此题
94#
 
填空题 ( 1.0 分) 切至单题模式 搜藏此题  
  Suppose that a person’s bo1v0eo 9 ueq khc3x0p:npgym+1dy resistance is $950\Omega$
(a) What current passes through the body when the person accidentally is connected to 110 V?   A
(b) If there is an alternative path to ground whose resistance is $45\Omega$, what current passes through the person?   A
(c) If the voltage source can produce at most 1.5 A, how much current passes through the person in case (b)? $\approx$    mA(retain three decimal places)

参考答案:     查看本题详细解析
本习题练习全部题目来源于题库网 (https://tiku.one)，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力
标记此题
95#
 
填空题 ( 1.0 分) 切至单题模式 搜藏此题  
  A Wheatstone bridge q7nzc1bv)bv z( kt9 y-is a type of “bridge circuit” used to make measurements of resistance. The unknown resistance to be measured,yq(b7kv1)zn z cb9-tv $R_x$, is placed in the circuit with accurately known resistances $R_1$ ,$R_2$, and $R_3$(Fig. Below). One of these, $R_3$, is a variable resistor which is adjusted so that when the switch is closed momentarily, the ammeter Ann Meter shows zero current flow.
(a) Determine $R_x$ in terms of $R_1$ ,$R_2$, and $R_3$.
(b) If a Wheatstone bridge is “balanced” when $R_1\,=\,630\Omega$,$R_2\,=\,972\Omega$, and $R_3\,=\,42.6\Omega$, what is the value of the unknown resistance?    $\Omega$



参考答案:     查看本题详细解析

标记此题
96#
 
填空题 ( 1.0 分) 切至单题模式 搜藏此题  
  An unknown length of platinum wire 0.920 mm in- kn,erqecb sl2e (t-9j yg7j3 diameter is placed as the unknown resistance in a Wheatstone bridge (lckej, 3n e(j2 st-er7g9-q bysee Problem 71;Fig. Below). Arms 1 and 2 have resistance of $38.0\Omega$ and $46.0\Omega$ respectively. Balance is achieved when $R_3$ is $3.48\Omega$ How long is the platinum wire?    m


参考答案:     查看本题详细解析

标记此题
97#
 
问答题 ( 1.0 分) 切至单题模式 搜藏此题  
What are the values of effective capacitance which can be, kwb5 tn2s nd93zlru1e ua+/d ;-wurk obtained by connecting four identical capa b+ e-kw u3 95 nlkdzt1un/w,r;d2usracitors, each having a capacitance C?
参考答案:    

标记此题
98#
 
填空题 ( 1.0 分) 切至单题模式 搜藏此题  
  The variable capacitanc (9;mjap-v7s 6 aclyyovc;p1ze of an old radio tuner consists of four plates connected together placed alternately between four other plates, also connected together (Fig. Below). Each plate is separated from its neighbor by 1.5 mm of air. One set of plates can move so that the area of o9; (vcay7-jo vyscm61;lazpp verlap of each plate varies from $2.0cm^2$ to $9.5cm^2$
(a) Are these seven capacitors connected in series or in parallel?   
(b) Determine the range of capacitance values. from    pF to    pF



参考答案:     查看本题详细解析

标记此题
99#
 
填空题 ( 1.0 分) 切至单题模式 搜藏此题  
  A battery produces 40.8 ale5epow/ )b0i cxmb.-:w/q iV when 7.40 A is drawn from it and 47.3 V when 2.20 A is drawn. What are the emf and internal resistance of the mai)e50e: pi -lw//.qbc xbwobattery?
r    $\Omega$
$\varepsilon$    V

参考答案:     查看本题详细解析

标记此题
100#
 
填空题 ( 1.0 分) 切至单题模式 搜藏此题  
  How many $\frac{1}{2}-W$ resistors, each of the same resistance, must be used to produce an equivalent $2.2-k\Omega$, $3.5-W$ resistor?    $\Omega$ resistors, each rated at ½ W, in   
What is the resistance of each, and how must they be connected? Do not exceed $P\,=\,\frac{1}{2}W$ in each resistor.    k$\Omega$ resistors, each rated at ½ W, in   

参考答案:     查看本题详细解析

标记此题
101#
 
填空题 ( 1.0 分) 切至单题模式 搜藏此题  
  The current through tw(l2h* k o.to(pli ,ts;)srrahe $4.0-k\Omega$ resistor in (Fig. Below) is 3.50 mA. What is the terminal voltage $V_{ba}$ of the “unknown” battery? (There are two answers. Why?) [Hint: use conservation of energy or Kirchhoff’s rules.]
right $V_{ab}$    V
left $V_{ab}$    V



参考答案:     查看本题详细解析
本习题练习全部题目来源于题库网 (https://tiku.one)，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力
标记此题
102#
 
问答题 ( 1.0 分) 切至单题模式 搜藏此题  
An air-filled parallel-plate capacitor has capaj:o63)gv imyz:tl( gecitance $C_0$. If two identically sized dielectric slabs of dielectric constants $K_1$ and $K_2$ are inserted as shown in Fig. 19–64, what is the new capacitance? [Hint: treat this as two capacitors in combination.]
参考答案:    

标记此题
103#
 
填空题 ( 1.0 分) 切至单题模式 搜藏此题  
  For the circuit shown in(Fig. Below)tu jfj82-.lswq gtkfz8dr+ 1lvb, 46q, determine
(a) the current through the 14-V battery $I_1$   $ \times10^{-5 }\;A$  
(b) the potential difference between points a and b, $V_a-V_b$.    V



参考答案:     查看本题详细解析

标记此题
104#
 
填空题 ( 1.0 分) 切至单题模式 搜藏此题  
  A solar cell, 3.0 cm square, has an output -c :nrdgcuu zq9u.4i- iwfj35 of 350 mA at 0.80 V when exposed to full sunlight. A solar panel that delivers close to 1.0 A of current at an emf of 120 V to an external load is ne ui4-rj3w5fc9: qiuguc.z-d n eded.
How many cells will you need to create the panel?    cells
How big a panel will you need, and how should you connect the cells to one another?    $m^2$
How can you optimize the output of your solar panel?    banks of    cells in series per bank, with the banks in    always have the panel   directly at the sun。

参考答案:     查看本题详细解析
本习题练习全部题目来源于题库网 (https://tiku.one)，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力
标记此题
105#
 
填空题 ( 1.0 分) 切至单题模式 搜藏此题  
  A power supply has a fzn)b l.n lvlz*7( savqj /0r)sixed output voltage of 12.0 V, but you need $V_T\,=\,3.0V$ for an experiment.
(a) Using the voltage divider shown in (Fig. Below), what should $R_2$ be if $R_1$ is $10.0\Omega$? $\approx$    $\Omega$(retain one decimal places)
(b) What will the terminal voltage $V_T$ be if you connect a load to the 3.0-V terminal, assuming the load has a resistance of $7.0\Omega$? $\approx$    V(retain one decimal places)



参考答案:     查看本题详细解析
本习题练习全部题目来源于题库网 (https://tiku.one)，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力
标记此题
106#
 
填空题 ( 1.0 分) 切至单题模式 搜藏此题  
  The circuit shown in (Fig. Below a) uses a neon-filled tube66xwhb 0 w2(g arqkz(o as in (Fig. Below b).aqw(zko66 g bhw0x2(r This neon lamp has a threshold voltage $V_0$ for conduction, because no current flows until the neon gas in the tube is ionized by a sufficiently strong electric field. Once the threshold voltage is exceeded, the lamp has negligible resistance. The capacitor stores electrical energy, which can be released to flash the lamp. Assume that $C=0.150\mathrm{~}\mu\mathrm{F},R=2.35\times10\mathrm{~}^6\Omega,V_0=90.0\mathrm{~V}$ and Ann meter=105 V
(a) Assuming that the circuit is hooked up to the emf at time $t\,=\,0$, at what time will the light first flash?    s
(b) If the value of R is increased, will the time you found in part (a) increase or decrease?   
(c) The flashing of the lamp is very brief. Why?
(d) Explain what happens after the lamp flashes for the first time.

a
b

参考答案:     查看本题详细解析

标记此题
107#
 
填空题 ( 1.0 分) 切至单题模式 搜藏此题  
  The current through 956mhyoxe :vc the $20-\Omega$ resistor in (Fig. Below) does not change whether the two switches $S_1$ and $S_2$ are both open or both closed. Use this clue to determine the value of the unknown resistance R.    $\Omega$


参考答案:     查看本题详细解析

标记此题
108#
 
填空题 ( 1.0 分) 切至单题模式 搜藏此题  
  In the circuit shown in (Fig. Bell6x r)bwqau- 9ih.d/zow), the $33-\Omega$ resistor dissipates 0.50 W. What is the battery voltage? $\approx$    V(retain one decimal places)


参考答案:     查看本题详细解析

标记此题
109#
 
填空题 ( 1.0 分) 切至单题模式 搜藏此题  
  (a) What is the equivalent restal;am ia ux *r200tx3istance of the circuit shown in (Fig. Below)? $R_{eq}$ $\approx$    $\Omega$(retain one decimal places)
(b) What is the current in the $18-\Omega$ resistor?    A
(c) What is the current in the $12-\Omega$ resistor?    A
(d) What is the power dissipation in the $4.5-\Omega$ resistor?   W



参考答案:     查看本题详细解析

标记此题
110#
 
问答题 ( 1.0 分) 切至单题模式 搜藏此题  
(a) A voltmeter and an ammeter can be ci01+.wbp vw+l gvpa-w 1vu(bs onnected as shown in (Fig. Below a) to measure a resistance R. If V is the voltmeter reading, and I is the ammeter reading, the value of R wvulv.w-ps b a+ iw1+(wpvb10gill not quite be $V/I$ (as in Ohm’s law) because some of the current actually goes through the voltmeter. Show that the actual value of R is given by
$\frac{1}{R}=\frac{I}{V}-\frac{1}{R_\mathrm{V}}$,
where $R_V$ is the voltmeter resistance. Note that $R\approx V/I\quad\mathrm{if}\quad R_\mathrm{V}\gg R$ .
(b) A voltmeter and an ammeter can also be connected as shown in (Fig. Below b) to measure a resistance R. Show in this case that
$R=\frac{V}{I}-R_\mathrm{A},$
where V and I are the voltmeter and ammeter readings and $R_A$ is the resistance of the ammeter. Note that $R_\mathrm{A}\quad\mathrm{if}\quad R\approx V/I\quad\mathrm{if}\quad
R_\mathrm{A}\ll R.$

参考答案:    

标记此题
111#
 
填空题 ( 1.0 分) 切至单题模式 搜藏此题  
  A flash lightbulb rated at 2.5 W and 3.0 V is operated by a 9.0-V bzwu),o t i.jk9ybt-7battery. To light the bulb at its rated voltage and power, a resistor R is connected in series as shown in (Fig. Bji-)bbz.t9yo7w ut,kelow). What value should the resistor have?    $\Omega$


参考答案:     查看本题详细解析

  • :
    •
    总分:111分 及格:66.6分 时间:不限时
    未答题: 已答题:0 答错题:
    此次习题练习共有 111 道题
    本系统支持习题练习，作业与考试三大模式，作业考试自动评分，成绩排序一键导出，可设定动态变量同一试卷千人千题
    如果您对本系统感兴趣，想加入我们或者想进行任何形式的合作，请加微信 skysky1258

    试卷内容到此结束!   © 2024 题库网 (https://tiku.one)版权所有

    浏览记录|使用帮助|手机版|切到手机版|题库网 (https://tiku.one)

    GMT+8, 2025-5-19 04:27 , Processed in 0.277168 second(s), 244 queries , Redis On.