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习题练习:Physics Unit19: DC Circuits



 作者: admin发布日期: 2022-08-17 15:49   总分: 102分  得分: _____________

答题人: 匿名未登录  开始时间: 22年08月17日 12:52  切换到: 整卷模式

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1#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The potential difference between the terminalo7 .u:gnq m)jks of a battery, when no current flows to an external circuit, is referrej qukno.:) mg7d to as the

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2#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The potential difference between the terminals of a battery, when bmvy08al(1le )pue6w current flows to an external circuit, is referred to as th80(lp1byeelwm 6 avu) e

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3#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  When two or more resistors are connected in serie8tmk7wcnk 8 ulop,pel,:zs d2 9nkt:;s to a battery

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4#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  When resistors are connecbii;ysp, r7jav4s0j 0ted in series,

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5#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Three identical resistors are connectebvw1g+ lx)d9z ckv +m:d in series to a battery. If the current of 12 A flows from the battery, how much current flows throughd+bw1x: )zglm9v+vkc any one of the resistors?

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6#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Three identical resistor) x7pxczyg;p8s are connected in series to a 12-V battery. What is the voltage across any one of the zx8xypg);cp 7 resistors?

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7#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  You obtain a 100 $\Omega$ light bulb and a 50 $\Omega$ light bulb. Instead of connecting them in the normal way, you devise a circuit that places them in series across normal household voltage. Which statement is correct?

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8#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  As more resistors are added in series to y4u8y:ck1y *jhq.ch n a constant voltage source, the power supplied by the sourcey cyn.8uc hkqy:h1*j4

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9#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  When two or more resistors are connected in parallel to d14;whr 4zn1ep1innt(l n 0fka battery,

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  When resistors are c;w 7: sk:huyeconnected in parallel, we can be certain that

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11#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Three identical resistors are connected in paralln0;kw*9y6jxn dc6t wa(pny1iel to a 12-V battery. What is the voltage of(w0j9w k6yi a1tn*n;pdx6c ny any one of the resistors?

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12#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Three identical resistors are connected in parallel to a bah(x7 r.ca4i:/g97. c nj sxib xbicl:dttery. If the current of 12 A flows from the battery, how much curr.r9 7xbcda:ic7 xgsih cx(4jbn/:l i.ent flows through any one of the resistors?

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13#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The lamps in a string of- /om.ui0nqzo+ ud:ci3igb0t qar-* jr4r2xz Christmas tree lights are connected in parallel. What happens if one lamp burns out? (Assume negligible resistance in the wires leading to .ma-4rr dt 02c/q*iib u+ q:oxzuj-zn3o0igrthe lamps.)

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14#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  As more resistors are added in parallel to a constai*+xf t.4v aidcmw3-qnt voltage source, the power suppli+cvtqdm 4 i3 ix*-.wfaed by the source

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15#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Consider three identical resistors, each of6vtd-ko w,uo,5yl(:i b5lyqg resistance R. The maximum power each can dissipate is P. Two of the resistors are connected in series, and a thiryul d y,l6kq ibw:o-,( gvt5o5d is connected in parallel with these two. What is the maximum power this network can dissipate?

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16#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
State Kirchhoff's junction rule.*oj1(sz )watfs3 le8q
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17#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
State Kirchhoff's loopg)j1 mvk+:22/hj sxttoc*7 w-h a8l.xrtixla rule.
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18#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Kirchhoff's loop rule is an zhfm0/ -uhsdh4r7*op example of

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19#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Kirchhoff's junction rule is an example ofd8-owwaf)3lx.qd py eq4h+u2

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20#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Which of the equations here is valid for the circuid3(h, kl.d yh ;w0qu9mbl*gj qt shown?


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21#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  If you connect two identn8br81/yes;g- u3bwi g8zp xjkv.msi6e5f5 aical storage batteries together in series ("+" to "-" to "+" to "-"), and place them in a circuit, the combination will provip r8;58 ienx.wb ak/iz86 35yg1e fmssjg bu-vde

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22#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  If you connect two identical storage batteries together in series ("+" to "-" tq 0p -v3sdin5ko "-" to "+"), and place them in a circuit, the combination will prov k-pq 3svi50dnide

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23#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  If you connect two identical storage batteries together in parallel, and plac acj0a dfv4w-p(7(sd ie them in a circuit, a p07s (dawj(-c4vdfithe combination will provide

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24#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  When two or more capacitors are fos:d. paco; 4c//juiconnected in series to a battery,

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25#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  As more and more capacitors are c r4vb5 mph07xaonnected in series, the equivalent capacitance of the combin0mhr57x a4bvpation increases.

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26#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Three identical capacitors are connected o*x1*chk;k; to )qgbvm 69iysin series to a battery. If a total charge of Q flows from the battery, how much charge does each capacitor carsmc;9bovq; tk yxo1*hi *k6)gry?

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27#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  When two or more capacitors are connected in parallel to a battery5x tyl6: -f ijf1hpp;t,

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28#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  As more and more caph m w-a;jhbln/8d/9+texw3 veacitors are connected in parallel, the equivalent capacitance of the combination incej na3bd8mtv /+hhw/x ew;9-lreases.

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29#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Three identical capacitors are connected in parallel to a battery. If a 8yjdft d 2 ke/ 6j6cyfqrn*i(,n9g;hftotal charge of Q flows from the battery, hqeiy6ngyj/fj d8 f(2c6 9hkfnd*, r; tow much charge does each capacitor carry?

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30#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the unit for the quantity RCwz2 f+vu(ib bt0r 6vx(h (w,sl?

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31#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A resistor and a capacitor are connected in series to an ideal*2dawk p+t :mhlm:p9l battery of constant terminal voltage. At the moment cont: m9 :lpw+2lm*h apdktact is made with the battery, the voltage across the capacitor is

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32#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A resistor and a capacitor are connected in series tdv w,ff1mz a0z-;f i-to an ideal battery of constant terminal voltage. At the moment contact is made with the battery,tzvffm- iz, 0 f;ad1w- the voltage across the resistor is

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33#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A resistor and a capacitor are connected in sg 0k6c r0n 1whysxmn,*eries to an ideal battery of constant terminal voltage. When this system reaches its steady-state, the voltage across th*w0r0,g cy 6nnkx ms1he resistor is

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34#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An ideal ammeter sho1qe) n6-vnh- yw(3 zveml;ztfuld

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35#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A galvanometer can be converted to0jfi7 n;0wef q an ammeter by the addition of a

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36#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A current reading is obtained by properly placing dintfg;;rr (jkxz3ipq) . ,fe**7 qhean ammeter in a circuit consisting of one resistor and one bxekr*q(e di.z ;j,pq frghif3*)7;ntattery. As a result,

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37#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Decreasing the resistance of an ammeter's sgq* yrdp9 n6jsa(sf9+9 ombr t(6obs6hunt resistance

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38#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  In order to construct a voltmeter from a galvanometer, oneop 0x*glws v wz-)s4;d normally would

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39#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Increasing the resistance ofmam8; pa;,evd a voltmeter's series resistance

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40#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A voltage reading is obtained by placizpiu,dd7h -xx y m/j3f1eak87ng a voltmeter across a resistor. What happz ae7df,1 uyp/i kj7xd-x m3h8ens to the total current flowing in the circuit as a result of this action?

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41#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An unknown resistor is wired in series with an ammeter, and a voltmeter is 5y7 qnx8:4fdwczu1c bplaced in parallel across both the resistor and the ammeter. This network is then placed across a battery. If one computes the value of the resistance by dividing the voltmeter reading by the ammete:d51xb8fc 4nu c7y zwqr reading, the value obtained

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42#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An unknown resistor is wiredzpl ded5 ami5h:yv107 in series with an ammeter, and a voltmeter is placed in parallel across the resistor only. This network is then connected0l zie15p:h5dyav m 7d to a battery. If one computes the value of the resistance by dividing the voltmeter reading by the ammeter reading, the value obtained

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43#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Four 20 $\Omega$ resistors are connected in series. What is the equivalent resistance?

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44#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Four resistors of 12, 3.0, 5.0,d6v vv yz3gpizyp7tv , 6.qt6a15fao3 and 4.0 $\Omega$ are connected in series. A 12-V battery is connected to the combination. What is the current through the battery?

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45#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Three resistors of 12, 12, and 6 pmgy+:u27;jg i1qboa.0 $\Omega$ are connected in series. A 12-V battery is connected to the combination. What is the current through the battery?

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46#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Three resistors of 12, 12, and 6.n p21lb4xqm8gnc 0fm20 $\Omega$ are connected in parallel. A 12-V battery is connected to the combination. What is the current through the $6 \; \Omega$ resistor?

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47#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 14-A current flows into a series combiq0* t4gk qkd9anation of a 3.0 $\Omega$ and a 4.0 $\Omega$ resistor. What is the voltage drop across the 4.0 $\Omega$ resistor?

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48#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 14-A current flows into a seriezd )cprie 3*(bg swo,+s combination of a 3.0 $\Omega$ and a 4.0 $\Omega$ resistor. What is the voltage drop across the 3.0 $\Omega$ resistor?

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49#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 22-A current flows into a parall(iu zen+1tl 30pl.r li:zq,pr el combination of 4.0 $\Omega$, 6.0 $\Omega$, and 12 $\Omega$ resistors. What current flows through the 12 $\Omega$ resistor?

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50#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 22-A current flows into a parallel combinobb*- o scs*4tation of a 4.0 $\Omega$, 6.0 $\Omega$, and 12 $\Omega$ resistors. What current flows through the 6.0 $\Omega$ resistor?

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51#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 22-A current flows into a parallel combinatifr9*zre ;nv ;xon of a 4.0 $\Omega$, 6.0 $\Omega$, and 12 $\Omega$ resistor. What current flows through the 4.0 $\Omega$ resistor?

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52#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 6.0 $\Omega$ and a 12 $\Omega$ resistor are connected in parallel to a 36-V battery. What power is dissipated by the 6.0 $\Omega$ resistor?

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53#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The following three appliances are connecte 2a19rh w 6hb5ecjggi7d to a 120-V circuit: 1200-W toaster, 650-W c 7 bjrch2h59eg6wgia1 offee pot, and 600-W microwave. If all were operated at the same time what total current would they draw?

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54#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the maximum number of 100-W light bulbs you can connect in pa(8vqepc;,m a;zns+q o 4u7yyvrallel in a 120-V circuit without tripping a 20-A circuit breakn,4+ sv8 oyqa;ec;z 7muv qy(per?

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55#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A combination of 2.0 h, uy5c 4nne. nfpao7+$\Omega$ resistor connected in series with 4.0 $\Omega$ resistor is connected in parallel with a 3.0 $\Omega$ resistor. What is the equivalent resistance?

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56#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two 4.0 $\Omega$ resistors are connected in parallel, and this combination is connected in series with
3.1 W. What is the effective resistance of this combination?

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57#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 2.0 $\Omega$ resistor is in series with a parallel combination of 4.0 $\Omega$, 6.0 $\Omega$, and 12 $\Omega$ resistors. What is the equivalent resistance of this combination?

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58#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two resistors of 15 rzk:l hk.ms5 z,lxz 2vzl50 e/and 30 $\Omega$ are connected in parallel. If the combination is connected in series with a 9.0-V battery and a 20 $\Omega$ resistor, what is the current through the 15 $\Omega$ resistor?

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59#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Three resistors of 4.0, 6swzl r((9w66vydltpjjyn l(l.*pw(6 .0, and 10.0 $\Omega$ are connected in parallel. If the combination is connected in series with a 12.0-V battery and a 2.0 $\Omega$ resistor, what is the current through the 10.0 $\Omega$ resistor?

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60#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two resistors of 5.0 and pjlplep v75 ix(hmd 0u)2fls pi/- :.b9.0 $\Omega$ are connected in parallel. A 4.0 $\Omega$ resistor is then connected in series with the parallel combination. A 6.0-V battery is then connected to the series-parallel combination. What is the current through the 4.0 $\Omega$ resistor?

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61#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two resistors of 5.0 and / oouwu; +8hmj9.0 $\Omega$ are connected in parallel. A 4.0 $\Omega$ resistor is then connected in series with the parallel combination. A 6.0-V battery is then connected to the series-parallel combination. What is the current through the 5.0 $\Omega$ resistor?

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62#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two resistors of 5.0q/ywr-+wy c m(9r8yhp and 9.0 $\Omega$ are connected in parallel. A 4.0 $\Omega$ resistor is then connected in series with the parallel combination. A 6.0-V battery is then connected to the series-parallel combination. What is the current through the 9.0 $\Omega$ resistor?

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63#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 3.0 $\Omega$ resistor is connected in parallel with a 6.0 $\Omega$ resistor. This combination is connected in series with a 4.0 $\Omega$ resistor. The resistors are connected to a 12-volt battery. How much power is dissipated in the 3.0 $\Omega$ resistor?

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64#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the total resistance of the circuit in Fig. 1 t*sbeb+)9ic y9-2?


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65#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  If $E = 40 \; V$, what is the voltage on R1 in Fig. 19-2?


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66#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  If $E = 20 \; V$, what is the current through $R_3$ in Fig. 19-2?


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67#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  If 1.5 A flows through 8 )ya5845qhk3oujwh :bbqben$R_2$, what is $E$ in Fig. 19-2?


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68#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the total resistance of the csshkvrv( + k7-,zen r5ircuit in Fig. 19-3?


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69#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  If $E = 100 \; V$, what is the voltage across $R_5$ in Fig. 19-3?


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70#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  If $E = 4.0 \; V$, what is the current through $R_6$ in Fig. 19-3?


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71#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  For the circuit in Fig.oih 9w4i ick(++kk)ye2 ga 0rf 19-4, determine the current in the 1 $\Omega$ resistor.


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72#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  For the circuit in Fig. 19-4, determine the current in wc)lzw i+xt6; 0stt.ncv 7z,x the 3 $\Omega$ resistor.


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73#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  For the circuit in Fig. 19o cxwd4 7/3z +q,0l:wxt rzugx-4, determine the current in the 4 $\Omega$ resistor.


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74#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the potential of point A relative to poin1a.2bmi 4qva kt C in Fig. 19-5?


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75#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the potential of point B relative to point C i-gxibxb)9 kq m xxj5:5n Fig. 19-5?


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76#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the potential of point D relative to point C a w2 tqgoxaoxu,g+a.p92w 56h in Fig. 19-5?


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77#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What current flows from the battery in Fig. 19-iohr8p7zkc6e6f) k 8r 6-dszh5?


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78#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the potential drr s v5v1rm)tu)op from point A to point B in Fig. 19-5?


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79#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Determine the current in ,om3px 0w xcez.4mpc9cs mu ;a8e:k-gthe 7 $\Omega$ resistor in Fig. 19-6.


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80#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Determine the currenqxd o0e q gx+x6b7ocu4kog -,u l+lx-3t in the 8 $\Omega$ resistor in Fig. 19-6.


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81#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Determine the current in wnjk44mv/yv, the 4 $\Omega$ resistor in Fig. 19-6.


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82#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What current flows i(paj89xuttnhzozx6 n n7aya0 xzo* r*u k (;)7n the 12 $\Omega$ resistor in Fig. 19-7?


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83#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What current flows in the 18d*q/f8m6z n/ah2 jihy $\Omega$ resistor in Fig. 19-7?


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84#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What current flows in the solid wire connecting the upper left and lower lawxr4az1y 40 left cornerswl1y zra04 x4a?

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85#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Four 16 mF capacitors are connected in series. The equotvv j 1r12h z+hbc-7livalent capacitance of this covz h+l2- h1t17cb vojrmbination is

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86#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  5.00 mF, 10.0 mF, and 50.0 mF capacitors are connected in a gv6nelbf(aa( j4yds 9 ,+3hlqzuf*9 series across a 12.0-V battery. How muchvdf yqha +,9ubfe nj l9l*sa(6ga34z( charge is stored in the 5.00-mF capacitor?

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87#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  5.00 mF, 10.0 mF, and 50.0 mF capacitors are connected in ser(p n4 /kd-o9bt3rkyyx ies across a 12.0-V battery. What is the potential difference acrok4nk pt b-y3(xo rdy9/ss the 10.0-mF capacitor?

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88#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 1.0-mF and a 2.0-mF capacitor are connected in serr(zz-)t:kqcdl(wm7 w 59 mifqies across a 3.0-V battery. What is the voltage across the 1.0-mF capacito:ftm rzmqc7q9 )k( wz 5l-wi(dr?

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89#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 1.0-mF and a 2.0-mF capacitor are connected in series ac x0fl( ;3cajh*nf2s -k 86xapkqb; mvmross a 3.0-V battery. What isfnm -hvx(6;b f*k8ps 3jc;m2a kaqx l0 the voltage across the 2.0-mF capacitor?

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90#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  1.0 mF, 2.0 mF, and 3.0 mF capacitors are connected in parallel across a 2( miyq,:k-lq6l 0:v bri h7s9zta wfy64-V babyta-:w l(qr,i76 yqs 0il6h:kvmfz9ttery. How much energy is stored in this combination when the capacitors are fully charged?

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91#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Capacitances of 10 mF and 20 mF are connected in parallel, ( g euyth6c*e7and this pair is then connected in series with a 30-mF cap*6h(gec 7yeutacitor. What is the equivalent capacitance of this arrangement?

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92#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two capacitors of 6.00 mF and 8.00 mF are connected fn jv9qt(cwww53k a21;kxdce-zp5 : dc2dl -l in parallel. The combination is then connected in series with a 12.0-V ;52 2-x1wnk ql (ldj3w 5 9-tpzkdfa:cdvcew cbattery and a 14.0-mF capacitor. What is the equivalent capacitance?

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93#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two capacitors of 6.00 mF and 8.00 mF are connectmio:;;a y cr/li;ea1a bvt(t) ed in parallel. The combination is then connected in series with a 12.0-V battery and a 14.0-mF capacitor. What is the charge on the 6. oa1c m/:t ;;i b;iea)ytla(vr00-mF capacitor?

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94#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two capacitors of 6.00 mF and 8.00 mF ardhy gt 6ouuy)gy5gh/0 /t 5sm8e connected in parallel. The combination is then connected in series with a 12.0-V battery and a 14.0-mF capacitor. What is the volt5 uyyh6s/)8u 5t otm0dg yhgg/age across the 6.00-mF capacitor?

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95#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 2.0-mF capacitor is charged t gafa *m9se meayjts9wl 6:,1/hrough a 50 $k\Omega$ resistor. How long does it take for the capacitor to reach 90% of full charge?

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96#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 2.0-mF capacitor is charged to 12 w xyek)vd933lz/d-a dV and then discharged through a $4.0 \times 10^{6} \; \Omega$ resistor. How long will it take for the voltage across the capacitor to drop to 3.0 V?

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97#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 4.0-MW resistor is connecx-av p04vfy;ij:y8m2dkny l5fp; n8w ted in series with a 0.50-mF capacitor. The capacitor is initially uncharged. The RC com420-jyfm8 fpk;i 5w vyx8 ln;dyv:apnbination is charged by a 9.0-V battery. What is the change in voltage between t = $RC$ and t = $3RC$?

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98#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 4.0-mF capacitor is charged to 6.0-V. It is thed;p6wzf2. es0rz) l nlct8wqt, 8cjn-n connected in series with a 3d ntc)tj.8 wzwlql68sn-;cp20,fz re.0 $M\Omega$ resistor and connected to a 12-V battery. How long after being connected to the battery will the voltage across the capacitor be 9.0 V?

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99#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A galvanometer has an internalu4-sj-y:bi ,lzygqi(y ,jc l2 resistance of 100 $\Omega$ and deflects full-scale at 2.00 mA. What size resistor should be added to it to convert it to a milliammeter capable of reading up to 4.00 mA?

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100#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A galvanometer has a coil with a resist:kug+ ypkszi5 8 xkp gacy* jc/yz*163ance of 24.0 $\Omega$. A current of 180 mA causes full-scale deflection. If the galvanometer is to be used to construct an ammeter that deflects full scale for
10.0 A, which resistor is required?

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101#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A galvanometer has an internal resi7y8v r-+zyx os.mn6-d8adapm stance of 100 $\Omega$ and deflects full-scale at 2.00 mA. What size resistor should be added to it to convert it to a millivoltmeter capable of reading up to 400 mV?

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102#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A galvanometer with a coil resistances nh0( 1bn0 av1h l1fdjcrx3a. of 40.0 $\Omega$ deflects full scale for a current of 2.0 mA. What series resistance should be used with this galvanometer in order to construct a voltmeter that deflects full scale for 50 V?

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