题库网 (tiku.one)

 找回密码
 立即注册

 

      

上传图片附件

未使用图片

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:gc textbook chapter 17 Electric Potential



 作者: admin   总分: 95分  得分: _____________

答题人: 匿名未登录  开始时间: 25年04月09日 20:26  切换到: 整卷模式

标记此题
1#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
If two points are at the same potential, does this mean2r )znio*,zwt0hk; pwqi *n(n that no work is done in moving a t; q(*t* wwionhr2,pnkzi0 nz )est charge from one point to the other? Does this imply that no force need be exerted? Explain.
参考答案:    

标记此题
2#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
If a negative charge .ieuw2k ..nmlis initially at rest in an electric field, will it move toward a region of higher potential 2em.k.i ul.nw or lower potential? What about a positive charge? How does the potential energy of the charge change in each instance?
参考答案:    

标记此题
3#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
State clearly the dinp44 fp *ugpg7fference (a) between electric potential and electric field, (b) between electric potential an4p gpf u4np*g7d electric potential energy.
参考答案:    

标记此题
4#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
An electron is accelerato: cl;g wox--eed by a potential difference of, say, 0.10 V. How much greater would its final se-o-g;:lwcox peed be if it is accelerated with four times as much voltage? Explain.
参考答案:    

标记此题
5#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
Is there a point along the line joining two equal positive charges whea*k,4ub1vz+g ifts, ; :iyzyfre the electric field is zero? Where thi+* zs yf; 4yuv k1fizgba,t:,e electric potential is zero? Explain.
参考答案:    

标记此题
6#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
Can a particle ever 8m*teet3,dikwz b7 d(um+)u1iwib)kb: dl4 hmove from a region of low electric potential to one of high potential and yet have its electric potential energy dechk+z)b,b3e(dt dm*bue dm tlwi:1 4k7wui8 i) rease? Explain.
参考答案:    

标记此题
7#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
Compare the kinetic enk-kisgti70 t(u uy63cito/+ eergy gained by a proton $(q=+e)$ to the energy gained by an alpha particle $(q=+2e)$ accelerated by the same voltage $V$.
参考答案:    

标记此题
8#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
If $V\,=\,0$ at a point in space, must $\vec{E}\,=0$ there? If $\vec{E}\,=0$ at some point, must $V\,=\,0$ at that point? Explain. Give examples for each.
参考答案:    

标记此题
9#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
Can two equipotential line1c j5r;k 9 ozw*c;trwfs cross? Explain.
参考答案:    

标记此题
10#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
Draw in a few equipotential line4 xy*cjphin5vo;6:k as in Fig. 16 – 31b.
参考答案:    

标记此题
11#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
What can you say about the electric field in a region of space that has the samelns+ ny9b--dmu tj +(l poted-m ls(u 9+jt+-nn ylbntial throughout?
参考答案:    

标记此题
12#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
A satellite orbits the Earth along a grav du/lzbz/12 4s6i+ erbmqlxp4itational equipotential line. What shape must tbd 4l/iq+rp6/m 4szb2 1ezuxlhe orbit be?
参考答案:    

标记此题
13#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
When dealing with practical dgb)ae lyo)yi7p.; uzm)+, wm+ kqr+yl evices, we often take the ground (the Earth) to be 0 V. If, instead, we said the ground was how wobyk;i a +ye zyum.,rgw+ll )+o7)m p)quld this affect (a) the potential V, and (b) the electric field E, at other points?
参考答案:    

标记此题
14#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
When a battery is connected to a capacitow 6nroe99p h8ir, why do the two plates acquire charges of the same magnitude? Will this be true if the two conductors aep689nho 9irw re different sizes or shapes?
参考答案:    

标记此题
15#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
We have seen that the capacfrpjq6. pyr 03d i()ju9fiv;53sixyn itance C depends on the size, shape, and position of the two conductors, as well as on the dielectric consta)ri0 ;rjp6v (5qifu9yjnf3yp3dxsi. nt K. What then did we mean when we said that C is a constant in Eq. 17 – 7?
参考答案:    

标记此题
16#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  How much work does the electric field do in mo x839kl -syuho:qp9 juving a $-7.7\mu C$ charge from ground to a point whose potential is $+55V$ higher?    $ \times10^{-4 }\,J$

参考答案:     查看本题详细解析

标记此题
17#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  How much work does the electric field do in moving a proton frmurjfcpt8.38 .oqtvn o75r/r :rxs i(om a point with a potential ot qicr3jtom po .rrvru7n/8f .(:x58s f $+125V$ to a point where it is $-55V$ Express your answer both in joules and electron volts.
   $ \times10^{-17 }\,J$
   eV

参考答案:     查看本题详细解析

标记此题
18#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  How much kinetic energy will an electron gain (in joules and eV) if it acce:dc 74g plm/0ei pjwh:lerates through a potential difference of 23,000 V in a TV picw4ichg/dp7pe :m lj:0ture tube?
   $ \times10^{-15 }\,J$
   eV

参考答案:     查看本题详细解析

标记此题
19#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An electron acquires m* oay:* zd,b5y;vq bo$7.45 \times10^{ -16}\,J$ of kinetic energy when it is accelerated by an electric field from plate A to plate B. What is the potential difference between the plates, and which plate is at the higher potential?
   V
plate 

参考答案:     查看本题详细解析

标记此题
20#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  How strong is the electric field between two parallel a-wgz bxtiai5i 6z5l. e*; 0nwplates 5.8 mm apart if the potential difference between them is 2-5z ;i*iewltwbz6ai. ng 0ax5 20 V?    $ \times10^{ 4}\,V/m$

参考答案:     查看本题详细解析

标记此题
21#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An electric field ofma.-4yz+7ujzi ku* cc $640V/m$ is desired between two parallel plates 11.0 mm apart. How large a voltage should be applied?    V

参考答案:     查看本题详细解析

标记此题
22#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The electric field between two parallel platez7cyiua 4dgef8t;xk9k 6r7. hs connected to a 45-V battery is $1500V/m$ How far apart are the plates?    m

参考答案:     查看本题详细解析

标记此题
23#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The electric field bet9v/. fqhvjd+7c3 p*o wpz:wesween two parallel plates connected to a 45-V battery is $1500V/m$ How far apart are the plates?    m

参考答案:     查看本题详细解析

标记此题
24#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What potential diffe j3vf ,u2:naywrence is needed to give a helium nucleus $(Q=2e)$ 65.0 keV of kinetic energy?    $ \times10^{4 }\,V$

参考答案:     查看本题详细解析

标记此题
25#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two parallel plates, connectekdhca3v+ zx3)p omh0 *d to a 200-V power supply, are separated by an air gap. How small can the gap be ifcvoh p )03da*xm3h zk+ the air is not to become conducting by exceeding its breakdown value of $E\,=3 \times10^{ 6}\,V/m$?   $ \times10^{-5 }\,m$

参考答案:     查看本题详细解析

标记此题
26#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The work done by an external fmt0k x7*,uur . ejb/0yefln7 1 azxtp+orce to move a $-8.50\mu C$ charge from point a to point b is $15.0 \times10^{ -4}\;J$. If the charge was started from rest and had $ 4.82\times10^{ -4}\;J$ of kinetic energy when it reached point b, what must be the potential difference between a and b?    V

参考答案:     查看本题详细解析

标记此题
27#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the speed of an electron with kinetic enboamg + (urj 0bs6c1zuth4:p /ergy
(a) 750-eV,    $ \times10^{7 }\;m/s$
(b) 3.2-keV?    $ \times10^{7 }\;m/s$

参考答案:     查看本题详细解析

标记此题
28#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the speed of a proton im)bejqe2 / .d5kc ij-whose kinetic energy is 3.2 keV?    $ \times10^{5}\,m/s$

参考答案:     查看本题详细解析

标记此题
29#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An alpha particle (which is3vulw* l.tf5 (e6oke r a helium nucleus, $Q=+2e$, $m\,=\,6.64\times10^{-27 }\,kg$) is emitted in a radioactive decay with $_{KE}$ = $5.53MeV$ What is its speed?    $ \times10^{7}\,m/s$

参考答案:     查看本题详细解析

标记此题
30#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the electric potential 15.0 cm from ; +achh2oz6jz . -)zek2qjjxna $4.00\mu C$ point charge?    $ \times10^{ 5}\,V$

参考答案:     查看本题详细解析

标记此题
31#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A point charge Q creq0/ujf d2o o0cates an electric potential of $+125V$ at a distance of 15 cm. What is Q?    $ \times10^{-9 }\,C$

参考答案:     查看本题详细解析

标记此题
32#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A $+35\mu C$ point charge is placed 32 cm from an identical $+35\mu C$ charge. How much work would be required to move a $+0.50\mu C$ test charge from a point midway between them to a point 12 cm closer to either of the charges?    J

参考答案:     查看本题详细解析

标记此题
33#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
Draw a conductor in the shape of a football. This conductorxrc ;-bk1g5yn carries a net negative chargeb-n1 ;g 5kxcyr, $-Q$. Draw in a dozen electric field lines and two equipotential lines.
参考答案:    

标记此题
34#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  (a) What is the electric potential a distance oa9st81h80)gknc jqhpf $ 2.5\times10^{-15 }\,m$ away from a proton?    $ \times10^{ 5}\,V$
(b) What is the electric potential energy of a system that consists of two protons $2.5 \times10^{-15 }\,m$ apart — as might occur inside a typical nucleus?    $ \times10^{ -14}\,J$

参考答案:     查看本题详细解析

标记此题
35#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
Three point charges are arranged at the corners of a squw 3rs+fl)c4gj1d/+,8nwpr uxz8ua f yare of side L as shown in Fig. 17–25. What is the potential at the fourth corner (point z8dxgrl3n8a,/4c+ wj f1s pruuy w)+fA), taking $V\,=\,0$ at a great distance?
参考答案:    

标记此题
36#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An electron starts from rest 32.5 cm from a fixeycv )2t: ezkg .21nxtfd point charge with $Q\,=\,-0.125\mu C$. How fast will the electron be moving when it is very far away?    $ \times10^{7 }\,m/s$

参考答案:     查看本题详细解析

标记此题
37#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two identical $+9.5\mu C$ point charges are initially 3.5 cm from each other. If they are released at the same instant from rest, how fast will each be moving when they are very far away from each other? Assume they have identical masses of 1.0 mg.    m/s

参考答案:     查看本题详细解析

标记此题
38#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two point charges, $3.0\mu C$ and $-2.0\mu C$ are placed 5.0 cm apart on the x axis. At what points along the x axis is
(a) the electric field zero    cm leftof $q_2$
(b) the potential zero? Let $V\,=\,0$ at $r\,=\,\propto$.

参考答案:     查看本题详细解析

标记此题
39#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  How much work must be done to bring three electrons from a great distance a14j pr1k(c1kvey. x6k7gmfu cpart tk xg1(cpk6kv1ymcfj 1ru4 .e 7o $1.0 \times10^{-10 }\,m$ from one another (at the corners of an equilateral triangle)?    $ \times10^{-18 }\,J$

参考答案:     查看本题详细解析

标记此题
40#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Consider point a which 8xbasgw7f5q -is 72 cm north of a $-3.8\mu C$ point charge, and point b which is 88 cm west of the charge (Fig. 17–26). Determine
(a) $V_{ba}=V_b-V_a$    V
(b) $\vec{E}_b-\vec{E}_a$ (magnitude and direction).
   V/m
   $^{\circ}\,$


参考答案:     查看本题详细解析

标记此题
41#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  How much voltage must be used to accelerate a proton (radiusgp1c5gg3q olqu 5cby)(5 m7vs $1.2 \times10^{-15 }\,m$) so that it has sufficient energy to just penetrate a silicon nucleus? A silicon nucleus has a charge of $+14e$, and its radius is about $ 3.6\times10^{-15 }\,m$. Assume the potential is that for point charges.    $ \times10^{6 }\,V$

参考答案:     查看本题详细解析

标记此题
42#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
Two equal but opposite charges are separated by a distance d, as shown in Fig. 1*nu1zaw d;f6ixnl9 /m7–27. Den; /fn 9amzxid1w6l u*termine a formula for $V_{BA}\,=\,V_B-V_A$ for points B and A on the line between the charges.
参考答案:    

标记此题
43#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  In the Bohr model of the hydrogen atom, an electron orbits a proton (the nucleuz/p.dui:q34j ;luz m k0b3ljos) in a circular orbit o:dq 3uuzzjk0 iml43 bopl/.; jf radius $ 0.53\times10^{-10 }\,m$.
(a) What is the electric potential at the electron’s orbit due to the proton?    V(Round to the nearest integer)
(b) What is the kinetic energy of the electron?
   $ \times10^{ -18}\,J$
   eV
(c) What is the total energy of the electron in its orbit?    $ \times10^{-18 }\,J$ $\approx$    eV(Round to the nearest integer)
(d) What is the ionization energy — that is, the energy required to remove the electron from the atom and take it to $r\,=\,\propto$, at rest? Express the results of parts b, c and d in joules and eV.   $ \times10^{-18 }\,J$    eV(Round to the nearest integer)

参考答案:     查看本题详细解析

标记此题
44#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An electron and a proton are:46c 7kz311qu5 9)ywnhzu libqaxsgs $ 0.53\times10^{ -10}\,m$. apart. What is their dipole moment if they are at rest?    $ \times10^{-30 }\,C\cdot\,m$

参考答案:     查看本题详细解析

标记此题
45#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Calculate the electric potential due to a dipole whose dipdi-u.gzrcf 9 *a3 ias2ole moment is $ 4.8\times10^{-30 }\,C\cdot m$ at a point $1.1 \times10^{ -9}\,m$ away if this point is
(a) along the axis of the dipole nearer the positive charge;    V
(b) 45° above the axis but nearer the positive charge;    V
(c) $45^{\circ}\,$ above the axis but nearer the negative charge.    V

参考答案:     查看本题详细解析

标记此题
46#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The dipole moment, considered as a vector, points fib)m+k: ir83yx ts ;xfrom the negative to the positive charge. The water molecule, +) xib;rftyix3: ks8mFig. 17–28, has a dipole moment which can be considered as the vector sum of the two dipole moments, $\vec{P}_1$ and $\vec{P}_2$as shown. The distance between each H and the O is about $ 0.96\times10^{ -10}\,m$. The lines joining the center of the O atom with each H atom make an angle of $104^{\circ}\,$, as shown, and the net dipole moment has been measured to be $p\,=\,6.1 \times10^{-30 }\,C\cdot m$ Determine the charge q on each H atom.    $ \times10^{ -20}\,C$


参考答案:     查看本题详细解析

标记此题
47#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The two plates of a c0-er8) dtegd1beso c - d,/nvph6g/l yapacitor hold $+2500\mu C$ and $-2500\mu C$ of charge, respectively, when the potential difference is 850 V. What is the capacitance?    $ \times10^{-6 }\,F$

参考答案:     查看本题详细解析

标记此题
48#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The two plates of a capacitoqtpj6 fqbfetl j6ml1 (p:l+)*r hold $+2500\mu C$ and $-2500\mu C$ of charge, respectively, when the potential difference is 850 V. What is the capacitance?    $ \times10^{-6 }\,F$

参考答案:     查看本题详细解析

标记此题
49#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 9500-pF capacitor holds plus and minus q c80 tls8.s fqf/1gtvcharges of $ 16.5\times10^{-8 }\,C$. What is the voltage across the capacitor?    V

参考答案:     查看本题详细解析

标记此题
50#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The potential difference between two short sections of parallel w9 8y )feke7svl-b-w ctcf cl26+7zf fdire in air is 120 V. They carry equal and opposite cha-eswz6v927fkcy+ f-cf 8) dblcelft7 rge of magnitude 95 pC. What is the capacitance of the two wires?    $ \times10^{13 }\,F$

参考答案:     查看本题详细解析

标记此题
51#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  How much charge flows from each terminal of a 12.0-V bask2ox,d8h w7gpgh 4lss ,b- 5,.ccixrttery when it is connected ts57cb2rd hspshwci.-k4x,8g,x l go ,o a $7.00-\mu F$ capacitor?    $ \times10^{-5 }\,C$

参考答案:     查看本题详细解析

标记此题
52#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 0.20-F capacitor is desired. What area must the plates:l5ta2 ,ojym y have if they are to be separated by a 2.2-mm ai,t l 2mjoyay:5r gap?    $ \times10^{ 7}\,m^2$

参考答案:     查看本题详细解析

标记此题
53#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The charge on a capacitor increases bs1 qor5; j,t0 gepidnd6h6pd;y $18\mu C$ when the voltage across it increases from 97 V to 121 V. What is the capacitance of the capacitor?    $ \times10^{ -7}\,F$

参考答案:     查看本题详细解析

标记此题
54#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An electric field ofl:ue ; mn+8gi gq+ddyerk86t2 $8.5 \times10^{ 5}\,V/m$ is desired between two parallel plates, each of area $35\,cm^2$ and separated by 2.45 mm of air. What charge must be on each plate?    $ \times10^{ -8}\,C$

参考答案:     查看本题详细解析

标记此题
55#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  If a capacitor has op 25jk+k(i4gbw3:e5ynpju f pwposite $5.2\mu C$ charges on the plates, and an electric field of 2.0 $2.0\,kV/mm$ is desired between the plates, what must each plate’s area be?   $m^2$

参考答案:     查看本题详细解析

标记此题
56#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  How strong is the electric field between the .pvp +,5 bicxtplates of a $0.80-\mu F$ air-gap capacitor if they are 2.0 mm apart and each has a charge of $72\mu C$ ?    $ \times10^{4 }\,V/m$

参考答案:     查看本题详细解析

标记此题
57#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A capacitor is charged by a 125-V batt 8pg,.gbgko3 uery (Fig. 17–29a) and then is disconnected from the battery. pg3 ob8gk,u.g When this capacitor $(C_1)$ is then connected (Fig. 17–29b) to a second (initially uncharged) capacitor, $C_2$, the final voltage on each capacitor is 15 V. What is the value of $C_2$? [Hint: charge is conserved.]    $ \times10^{ -5}\,F$


参考答案:     查看本题详细解析

标记此题
58#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A $2.50-\mu F$ capacitor is charged to 857 V and a $6.8-\mu F$ capacitor is charged to 652 V. These capacitors are then disconnected from their batteries. Next the positive plates are connected to each other and the negative plates are connected to each other. What will be the potential difference across each and the charge on each? [Hint: charge is conserved.]
$V_{final}$ $\approx$   V(Round to the nearest integer)
$\begin{array}{l}
Q_{1}\\
\text { initial }
\end{array}$   $ \times10^{-3 }\,C$
$\begin{array}{l}
Q_{2}\\
\text { initial }
\end{array}$   $ \times10^{-3 }\,C$

参考答案:     查看本题详细解析

标记此题
59#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the capacitance of two sqv0kdb: hyf -2 fk5blr:uare parallel plates 5.5 cm on a side that are separated by 1.8 mm of para-b :brv2lyh 0dkf5:fkffin?    $ \times10^{-11 }\,F$

参考答案:     查看本题详细解析

标记此题
60#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the capacitance of a k 3 zojb;;; 4rzehoron69xbbcd 4.e,opair of circular plates with a radius of 5.0 cm sepxo ozhbnkro; 4e;ez3r.db4o c;,b 6j9arated by 3.2 mm of mica?    $ \times10^{-10 }\,F$

参考答案:     查看本题详细解析

标记此题
61#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 3500-pF air-gap capacitor is connected to a 22-V32tdw oqpjrr w40 ;a,w battery. If a piece of mica is placed between the plates, how much charge will flow from the battery?, rw po2qaw;3 djtw0r4    $ \times10^{ -7}\,C$

参考答案:     查看本题详细解析

标记此题
62#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The electric field between the plates of a papx 2un.o6e:p bler-separated $(K=3.75)$ capacitor is $ 8.24\times10^{4 }\,V/m$. The plates are 1.95 mm apart, and the charge on each plate is $0.775\mu C$. Determine the capacitance of this capacitor and the area of each plate.
   $ \times10^{--9 }\,F$
   $m^2$

参考答案:     查看本题详细解析

标记此题
63#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  650 V is applied to tqii,fb : i)o. k6n+hma 2200-pF capacitor. How much energy is stored?    $ \times10^{-4 }\,J$

参考答案:     查看本题详细解析

标记此题
64#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A cardiac defibrillator is used to shock a hear/ mk5 vciwa +:a,zvg(qt that is beating erratically. A capacitor in this d v(zm/:k va5 w+gaq,cievice is charged to 5.0 kV and stores 1200 J of energy. What is its capacitance?    $ \times10^{-5 }\,F$

参考答案:     查看本题详细解析

标记此题
65#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  How much energy is stored by the electric field between two 6;5/s, e 5f 3u0f+kyi mbv bigzxhv-rpsquare plates, 8.0 cm on a side, separated by a 1.6g-sm;i3 fr +,xukv/5vyip0e5hzbb f 5-mm air gap? The charges on the plates are equal and opposite and of magnitude $420\mu C$.    J

参考答案:     查看本题详细解析

标记此题
66#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A homemade capacitor is assembyu/r9l 7,cgr0m gi2l gled by placing two 9-in. pie pans 5 cm apart and connecting them to the opposite terminals of a 9-V battery.g0 gr,2ir 7lc 9gumy/l Estimate
(a) the capacitance,    $ \times10^{-12 }\,F$
(b) the charge on each plate,    $ \times10^{-11 }\,C$
(c) the electric field halfway between the plates,    V/m
(d) the work done by the battery to charge the plates.    $ \times10^{ -10}\,J$
(e) Which of the above values change if a dielectric is inserted?

参考答案:     查看本题详细解析

标记此题
67#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
A parallel-plate capacitor has fixeh ,xtxi o+t qh+/og* t;zi*uh0d charges $+Q$ and $-Q$ The separation of the plates is then doubled.
(a) By what factor does the energy stored in the electric field change?
(b) How much work must be done in doubling the plate separation from d to 2d? The area of each plate is A.
参考答案:    

标记此题
68#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
How does the energy storvf b3vg3 -d4cufs; rfu1:or9ted in a capacitor change if (a) the potential difference is doubled, and (b) the charge on each plate is doubled, as the capacitor remains con9r uf-scb 3f1ovtudr:v4g ;f3nected to a battery?
参考答案:    

标记此题
69#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A $2.70-\mu F$ capacitor is charged by a 12.0-V battery. It is disconnected from the battery and then connected to an uncharged $4.00-\mu F$ capacitor (Fig. 17–29). Determine the total stored energy
(a) before the two capacitors are connected,    $ \times10^{-4 }\,J$
(b) after they are connected.    $ \times10^{-5 }\,J$
(c) What is the change in energy?    $ \times10^{-4 }\,J$


参考答案:     查看本题详细解析

标记此题
70#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  In a given CRT, electrons k+h z; ++bh,kwnm : fxwmdu64k.dvn(jare accelerated horizontally by 7.0 kV. They then pass through a uniform electric field E for a distance of 2.8 cm, which deflw+w.(bhzm x; 6+m,+kvj4nf kd duh:nkects them upward so they reach the screen top 22 cm away, 11 cm above the center. Estimate the value of E.    $ \times10^{5 }\,V/m$

参考答案:     查看本题详细解析

标记此题
71#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Electrons are accelerated by 6.0 kV 0t :knm*pz ut)in a CRT. The screen is 30 cm wide and is 34 cm from the 2.6-cm-long deflection plates. Over what range must the horizontally defleckttnz:)mp*0 uting electric field vary to sweep the beam fully across the screen?    $ \times10^{5 }\,V/m$ to    $ \times10^{5 }\,V/m$

参考答案:     查看本题详细解析

标记此题
72#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An electron starting from rest acquires 6.3 keV of KE in mmwk/aec *8;v: o8ptvu oving from point A to point B. *akmpve/wv; o:c8tu 8
(a) How much KE would a proton acquire, starting from rest at B and moving to point A?    keV
(b) Determine the ratio of their speeds at the end of their respective trajectories.   

参考答案:     查看本题详细解析

标记此题
73#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A lightning flash transfers 4.0 C of charge and 4.2 MJ of energy f o)t sl veo-8nc:pr*/to the Earth.
(a) Across what potential difference did it travel?    $ \times10^{ 6}\,V$
(b) How much water could this boil and vaporize, starting from room temperature?    kg

参考答案:     查看本题详细解析

标记此题
74#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  There is an electric field near the Earth’s surface whose magnitue gr t9qlmv/;1 4*rb,2cjamar d 7dqw.de is about $150\,V/m$ How much energy is stored per cubic meter in this field?    $ \times10^{-7 }\,J/m^3$

参考答案:     查看本题详细解析

标记此题
75#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  In a television picture tube, electrons are accelerated by thousands of .8wkr fzvq/nfor649avolts through a vacuum. If a television set were laid on its back, would electrons be able to move upward against the force of gravzwk4r6rf.a oqf/n 8v9ity? What potential difference, acting over a distance of 3.0 cm, would be needed to balance the downward force of gravity so that an electron would remain stationary? Assume that the electric field is uniform.    $ \times10^{ -12}\,V$

参考答案:     查看本题详细解析

标记此题
76#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A huge 4.0-F capacitor has enough stored energy to heat 2.5 kg of water f s hwm tj m 3 lb7lmjua::e(nkb3cte7a..3r;8trom 21$^{\circ}\,C$ to 95$^{\circ}\,C$. What is the potential difference across the plates?    V

参考答案:     查看本题详细解析

标记此题
77#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An uncharged capacitor is.g9/2fgfgzw z yuin c j(day(s1,-rf5 connected to a 24.0-V battery until it is fully charged, after which it is disconnected from the battery. A slab of paraffin is/2yazd(u.,1 wif5 ngrygjf( - s9gcf z then inserted between the plates. What will now be the voltage between the plates?    V

参考答案:     查看本题详细解析

标记此题
78#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Dry air will break down if the electric field exceedsi7 , i1hirz709 zorxe; yfc*ij $3.0 \times10^{6 }\,V/m$. What amount of charge can be placed on a parallel-plate capacitor if the area of each plate is $56cm^2$?    $ \times10^{-7 }\,C$

参考答案:     查看本题详细解析

标记此题
79#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
Three charges are at the corners of an equilateral triangle (siz y0yfi(wgj5d;qw0l * de L) as shown in Fig. 17–30. Determine the potential at the midpoint of each of ;q5*lwdwi ygz0(jyf0 the sides.


参考答案:    

标记此题
80#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A $3.4\mu C$ and a $-2.6\mu C$ charge are placed 1.6 cm apart. At what points along the line joining them is
(a) the electric field zero,    cm left of $q_2$
(b) the electric potential zero?

参考答案:     查看本题详细解析

标记此题
81#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 2600-pF air-gap capaci :08,p( sldynllyo b)x; hiy2stor is connected to a 9.0-V battery. If a piece of Pyrex2, nb (0)sxdlo:yy;slil 8y ph glass is placed between the plates, how much charge will then flow from the battery?    $ \times10^{-8 }\,C$

参考答案:     查看本题详细解析

标记此题
82#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An electron is accelerated horizontally from rest in a television picture tubfe ln:u/ y-gr:c86ed ke by a potential difference of 5500 V. It then passes between two horizontal plate ln:gru6:8e/ce -dk yfs 6.5 cm long and 1.3 cm apart that have a potential difference of 250 V (Fig. 17–31). At what angle $\theta$ will the electron be traveling after it passes between the plates?    $^{\circ}\,$


参考答案:     查看本题详细解析

标记此题
83#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
A capacitor of capaci9sqn20whu3(bcch vp(tance $C_1$ carries a charge $Q_0$. It is then connected directly to a second, uncharged, capacitor of capacitance $C_2$, as shown in Fig. 17–32. What charge will each carry now? What will be the potential difference across each?

参考答案:    

标记此题
84#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  To get an idea how big a farad is, suppose you want tozqt7hcud ,ncx c2/3 0k6 yyey- make a 1-F air-filled parallel-plate capacitor for a circuit you are building. To make it a reasonable size, suppose you limit the plate area to What would the gap have to be between the plates? Is this practically achievable? ,7 cy-2nu6 0kc 3z yey/xdqcht   $ \times10^{-16 }\,m$  

参考答案:     查看本题详细解析

标记此题
85#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Near the surface of the Earth there is an electric field of about 8+iwf/lx4) dhkbya/k$150\,V/m$ which points downward. Two identical balls with mass $m\,=\,0.540kg$ are dropped from a height of 2.00 m, but one of the balls is positively charged with $q_1$ = $650\mu C$ ,and the second is negatively charged with $q_2$ = $-650\mu C$. Use conservation of energy to determine the difference in the speed of the two balls when they hit the ground. (Neglect air resistance.)    m/s

参考答案:     查看本题详细解析

标记此题
86#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The power supply for a pulsed nitrogen laser has al*a hu.cp,;c *fvi)sz $0.050\mu F$ capacitor with a maximum voltage rating of 30 kV.
(a) Estimate how much energy could be stored in this capacitor.    J
(b) If 12% of this stored electrical energy is converted to light energy in a pulse that is 8.0 microseconds long, what is the power of the laser pulse?    $ \times10^{5 }\,W$

参考答案:     查看本题详细解析

标记此题
87#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  In lightning storms, the potential differa60e yl4xm hx0s89u m;dkn3 fuence between the Earth and the bottom of the thunderclouds can be as high as 35,000,000 V. The bottoms of the thunderclouds3x esmf9;y xnmdu4hua 68k00l are typically 1500 m above the Earth, and can have an area of $110km^2$ Modeling the Earth–cloud system as a huge capacitor, calculate
(a) the capacitance of the Earth–cloud system,    $ \times10^{-7 }\,F$
(b) the charge stored in the “capacitor,”    C(Round to the nearest integer)
(c) the energy stored in the “capacitor.”    $ \times10^{8 }\,J$

参考答案:     查看本题详细解析

标记此题
88#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  In a photocell, ultraviolet (UV) lighta r+zb 1vq(nn: provides enough energy to some electrons in barium metal to eject them from a surface at high speed. See Fig. 17–33. To measure the maximum energy of the electrons, another plate above the barium surface is kept at a negative enough potential that the emitted electrons are slowed down and stopped, and return to the barium surface. If the p: rq avnn1zb+(late voltage is $-3.02V$ (compared to the barium) when the fastest electrons are stopped, what was the speed of these electrons when they were emitted?    $ \times10^{6 }\,m/s$


参考答案:     查看本题详细解析

标记此题
89#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A point charge is placed 36 cm from azya1su7:).lxa0e .1s b m qxkun identical $+33\mu C$ charge. A $-1.5\mu C$ charge is moved from point a to point b in Fig. 17–34. What is the change in potential energy? $\approx$    J (round to one decimal place)


参考答案:     查看本题详细解析

标记此题
90#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A capacitor is made from two 1.1-cm-xj*hn 8w1gy y qp,2qx46 hoy4obre 47gdiameter coins separated by a 0.15-mm-thick piece of papp,4 goqq61jx84h2 wg 7by4nyh yrxo *eer $(K=3.7)$ A 12-V battery is connected to the capacitor. How much charge is on each coin?    $ \times10^{-10 }\,C$

参考答案:     查看本题详细解析

标记此题
91#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A $+4.5\mu C$ charge is 23 cm to the right of a $-8.2\mu C$ charge. At the midpoint between the two charges,
(a) what are the potential    $ \times10^{ 5}\,V$
(b) the electric field?    $ \times10^{6 }\,V/m$  

参考答案:     查看本题详细解析

标记此题
92#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capacitor with plate 9a*yz6 vwkga:area $2.0cm^2$ and air-gap separation 0.50 mm is connected to a 12-V battery, and fully charged. The battery is then disconnected.
(a) What is the charge on the capacitor?    $ \times10^{ -11}\,C$
(b) The plates are now pulled to a separation of 0.75 mm. What is the charge on the capacitor now?    $ \times10^{ -11}\,C$
(c) What is the potential difference across the plates now?    V
(d) How much work was required to pull the plates to their new separation?    $ \times10^{-10 }\,J$

参考答案:     查看本题详细解析

标记此题
93#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A $2.5-\mu F$ capacitor is fully charged by a 6.0-V battery. The battery is then disconnected. The capacitor is not ideal and the charge slowly leaks out from the plates. The next day, the capacitor has lost half its stored energy. Calculate the amount of charge lost.    $ \times10^{-6 }\,C$

参考答案:     查看本题详细解析

标记此题
94#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two point charges are fog jpt f.0 ga aqkh:3w-3ign2 , +w/nu3jjogd7ixed 4.0 cm apart from each other. Their charges are $Q_1$=$Q_2$=$5.0\mu C$, and their masses are $m_1=1.5mg$ and $m_2=2.5mg$
(a) If $Q_1$ is released from rest, what will be its speed after a very long time?    m/s
(b) If both charges are released from rest at the same time, what will be the speed of $Q_1$ after a very long time?    m/s

参考答案:     查看本题详细解析

标记此题
95#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two charges are placed as shown in F5 :hy1t gsv5puig. 17–35 with $q_1$=$1.5\mu C$ and $q_2$=$-3.3\mu C$ Find the potential difference between points A and B.    $ \times10^{ 5}\,V$


参考答案:     查看本题详细解析

  • :
  • 总分:95分 及格:57分 时间:不限时
    未答题: 已答题:0 答错题:
    当前第 题,此次习题练习共有 95 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

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

    GMT+8, 2025-7-2 05:37 , Processed in 0.264346 second(s), 212 queries , Redis On.