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习题练习：Physics Unit19: DC Circuits
本习题练习来源于51fly国际课程 (https://51fly.win)，是在线习题练习的打印版，您也可以访问本平台网站(https://51fly.win/)直接在线完成(注册并登录账号后在首页左侧输入试卷号 77 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://51fly.win/test77.html
 作者: physics  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 terminals of a battery, q uz7(zfu1+f snz3f9emt wo.: nk,9hawhen no current flows to an external circuit, is referred to az+,n wktf9:nuas7 q.fzo uhf (e3zm19s 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 g2ur7; ud+uuz z6f-bibetween the terminals of a battery, when current flows to an eu- zr; gu2u bd76+zfiuxternal circuit, is referred to as the

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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 series to a baab5ugyj- vl7us iz9cv731ak /m0,qop- f6bx i ttery

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4#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  When resistors are connectedwi85,81fi/fzqm1 h opz2sy)lda d 5q m 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 cq4j+8o kj/:vfx8g *n/dbwwri onnected in series to a battery. If the current of 12 A flows from the /owwnjk/j r8 +* qfdx48ib gv:battery, how much current flows through 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 resistors are connected in seriesr8+j)c u5kh5k9zisxa to a 12-V battery. What is the voltag5ri 8xasjz) 9hc5k k+ue across any one of the 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 a constant voltage source, di91dzf; yiv+.3l b,snffbh+8qh+ o wthe power supplied by the sourceb,1ob;fdh y9zliff d.qs+v8+ +i3h nw

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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 hx r2xd s:o)u) mm frhvg *f,zo14gv87kd5cc7 in parallel to a 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 connected in parallel, we can 30h q;w8k* q25bp i,qqwv gsnybe 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 paralleq+ed78 1pmgff l to a 12-V battery. What is the voltage of any one of the resistors?1mg+f7 8qepdf

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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 battery. If the curren gsh(2ezv+zn bz1j9c8t of 12 Asc +2 e(vzjnzgb189zh flows from the battery, how much current 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 Ch u i-q9iln*blwud 48kph1ccpbj831;p ristmas tree lights are connected in parallel. What happens*88i1bb;- quwlp kp1nd chlip4c uj93 if one lamp burns out? (Assume negligible resistance in the wires leading to the 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 constant voltage sourn-:sik4y -ra0 vys- llg2;cmece, the power supplied byr:-g0- mni kys;-vs a2yl e4lc 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 of resistance ;ljkqbi5 e:-+tshpy+R. The maximum power each can dissipate is Pet:-5 l+kjpiyqh ;+bs. Two of the resistors are connected in series, and a third 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 rpiu t9 ;8o6boi8 rj2wz ; *ud-5iejwxeule.
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17#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
State Kirchhoff's loop rugd-o fv;y:gp x ubu6usb,rx(/ o7o,c/le.
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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 examplex08w2n tgu ,rj0d pmc* 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 rul)5gmj(u7dczdj8q (jz u9xtu9 e is an example of

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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 thel-t xijl:5ve-ficy.( circuit 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 identinmakb6yq e,mz0:sut(j82ho3 cal storage batteries together in series ("+" to "-" to "+" to "-"), and place them in a cit 8m s kenz0jq3h(2 6o,a:ymburcuit, the combination will provide

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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 ser i h7)r 3en8g cgojl0w*is2nh52t1zuhies ("+" to "-" to "-" to "+"), and place them in a circuit, the combination will pros *g z2t02 1)h5hgwlnij3 oi7her8ucn vide

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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 togetz)c,is 7tr2 05uv.z nfvo/u t5p vscv(her in parallel, and place them in a rpoz )v/5tvsv7i (ccf.t s5n0uz,uv2circuit, the 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 capw. htsjchn5 k52 +l/kkjn/5 0laezun-acitors are connected 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 connected in series,m cj.l3m9c)rk 4wo tn- the equivalent capacitance of the comb lc kr-c3ow9mj 4.tn)mination 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 in series to a bcu/m* k:zn- t9gjf au.attery. If a total charge of Q flows from the battery, how much c9-:a/zcfg . km u*ntjuharge does each capacitor carry?

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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 qor(6m oi/pn*3 h9gw )bi*6u2i mxetcparallel to a battery,

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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 capacitors are connected in parallel, the equivalent capacitanccv qu:xsd;3(p e of the combination increas qpv 3xuds(c:;es.

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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 batteryz r9k5b6*4wq4ra m6qg 3bg2gtnmyhi. . If a total charge of Q flows from the battery, how much ch435 qb96grgyzn r4a6 ihktm*qbwm2. garge 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 quantityh44g fce2 j6tv RC?

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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 battery of constw op nm86s ta; c(dlm31zr0th9)rzr(n:dujr )ant terminal vrsdp(;c or930w8jtn :num)zrdz(h16lrm a)t oltage. At the moment contact 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 to an ideal ba ax29lo )) rfbz45al)ajuu/4u)kw/lqbh6 ej x ttery of constant terminal /9l l klxou)zb5qa4a j x)rhw2u4)6fbj)u/ea voltage. At the moment contact is made with the battery, 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 ar1fjhe70wjht61e / tyjl m/e f)e connected in series to an ideal battery of constant terminal voltage. When this system reachefe/ 7t6 yw1m)j0elfjj t1eh/h s its steady-state, the voltage across the 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 shoux g+kot ztt9t*++q;rdp9ev2 uld

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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 to anz sa1 ; femztc2u/ck v2c,0c9l 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 ang6n u57r( jpkjvo6 v5jsji x(( ammeter in a circuit consisting of one regrijjjxjk6 v55 7(np6(( svuosistor and one battery. 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 ovtk aj5*)b*ie ed3v t2l mph6osb-*jfgk:6t 2f an ammeter's shunt 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 aw-wr)g,3 anht voltmeter from a galvanometer, one 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 of a voltmeter's series resista zts *0hh3i.lqnce

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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 placing a voltmeter across a resistgbikx o 6p/, iaz2 a+vwrm8t*,or. What happens to the total tr8abp+ agi,6wk/izmvo2* ,x 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 a2wm. c.1w yk3uo2l j2w j+dfdbmmeter, and a voltmeter is placed 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 ammeter reading, the value obtainewo2c .2 jl2 u3bd jm.wfk+w1dyd

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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 wired in series with an ammeter, and a volhvtlu8n9.- /l+z4;si . ig vqj*rebxk tmeter is placed in paralle8t e z llv-iv.*/nrkh qub;+4.s 9xjgil across the resistor only. This network is then connected 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, anrc4 40hyp sp 9;7sb7xg6awtcm d 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 12,64)s on led:jr 12, and 6.0 $\Omega$ 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 b;nf r2np4e6)mz, fr u6.0 $\Omega$ 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 serkg u 88izwcsx 3vi9-2sgzk)3 bies combination 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 series combination of avkk4 1xh3k93gazz :pss j4wc5aqs: ; p 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 intz707q +or.qrdiftal. o a parallel 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 intok,gloyn0u1 z3oj./qd a parallel combination 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 lc8c/ y8qc zqevp2v lc0 6q6j+into a parallel combination 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 ar m 2n0pq/f8b4byo esr+e connected to a 120-V circuit: 1200-W toaster, 650-W coffee pot, and 600-W microwave. If all were opebp 0 82rme+s4noqy /fbrated 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, t z4tdsim ai+*tb3s; light bulbs you can connect in parallel in a 120-V circuit without tripsdmt+z4s3b *ttii ;a, ping a 20-A circuit breaker?

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55#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A combination of 2.0km4r f jhap** 68p ,kgc9r2hjs $\Omega$ 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 an,sa *f/ qwu5 pm7gq9oad 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, 6. 4gd( uwd4w ymha:o)u(iz;d1uv:.uxb0, 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 5p+l hb.,zjmcw c ho4o vop0/(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 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 9.0ag 2k1vmbgp9og2e j-0o*e -wa3 ia7or $\Omega$ 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 5.0 .rygd6i-rk.3oz bbsrqx56* y 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 a, ,f)mqbx7q pnpmx58circuit in Fig. 19-2?


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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 throui)3t j.0;ojpgs b fwr1gh $R_2$, 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 circuit in Fig. 19-3 +jsugo/7cfq -?


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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. 19-4, determine the c cvs7a ;7gs1t lf2e+udurrent 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 tbw ma,86 e)ghbh-k e)dhe current in 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. 194k.6fje ,rlk6 fgn( fv-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 hlgvuw4: w+rq.ng +ys5.qa2t point 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 o n8co t)jaade c a7c9(-g-mo5 t3uasg:f point B relative to point C in 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 in Fig.y6jdkvg3ozq717 p v1wk;m y 5o 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. 19-5?r6gw*yi7s hgdi7*t ; a


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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 drop from point Ad) w qcaae; :xn9j/wj* 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 t:vcu- ws0lk jmo98p )ehe 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 current in fxz7fr-e+tg 7the 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 inx +vi4/y t.p.r:f+ybrqmn *si 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 ig,z2m dw:2uspg8bs/.tt9c( f knnm c -n 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 innx:rehu 3 pc2l b,7jb+ the 18 $\Omega$ 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 solidca;z,4c*g,v 66+xo7 syvzmznt ufp/x wire connecting the upper left and lower left coonct vzaxs4*7fc m/,6x+6;u,zz gyv prners?

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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 equivalent capac; .x bp1zrfik599 uxqcitance of th xc9;ub z5xr1. 9ifqpkis combination 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 cl2k ()lsuk st l(mj,)xonnected in series across a 12.0-V batterl )k2( tkjsx,lmu()sly. How much 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(*q.g-rp k crr -gbrg4j 8h,kawi;q +q -3xmpp in series across a 12.0-V battery. What is the potential difference across the 10.0-mF capacq*3j g4qr kkp,gc(m r +rg8 ;-iqp.pwxarb -h-itor?

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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 series across a 3.0-V b8 gx e3 3od;ig-rxfz,/ 0lmkjvattery. What is the voltage8gf vir3eoxkjd, ; x/g0-l3zm across the 1.0-mF capacitor?

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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 (ka q9x uf/ylea5 il5 ln3zc10capacitor are connected in series across a 3.0-V battery. What is the voltage across the 2.0-mF capacitocnq uz1f/x30eky5al 5(i l9alr?

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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 b3z wo,1,xdjf across a 24-V battery. How much energy is stored in this combination whez ,1obwdx,f3jn 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 connec f3ie 3-h 2-oz4vyua6qj+tec oted in parallel, and this pair is then connected in series with a 30-mF capacitor. What is the equivalent capacituo-z46+i3e-c yvf h2aq j3oetance 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 m :t/a k fgryym.jde;5lq 2lzz/:5+g ukF are connected in parallel. The combination is then cfru+q 5tjz;gdlk/l5e:y/ .gyak 2:mzonnected in series with a 12.0-V battery 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 connected in paral1x :7+ ue 2x.qdehjgoblel. The combination is then connected +bxh 2dqx ge.jeou:17in series with a 12.0-V battery and a 14.0-mF capacitor. What is the charge on the 6.00-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 are connected in parallel. The f, 78mq kaubk7combination is then connected in series with a 12.0-V q7 ukk7,mb fa8battery and a 14.0-mF capacitor. What is the voltage 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 through l j+.ea g)eo 2 c3xjtm6 p-g3f;0kr(eectowe(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 charg h-+9dkeekk 3hed to 12 V 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 connected ;qz4/ nf1aa dzin series with a 0.50-mF capacitor. The capacitor is initially uncharged. The ; adzaqznf/41 RC combination 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 chatw34t;u/ua b:f oa. fmz+(yyr rged to 6.0-V. It is then connected in series with a 3.0 :+ouf wmyt3yt z /bur(f.a; a4$M\Omega$ 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 internal resistance of 1ee: ;lv m643kkj,tnqggly:so. /vac /00 $\Omega$ 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 w +xol.8(un :.u tqizqk jphny1*ikk43ith a resistance 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 4jse.w2 v4 cpvinternal 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 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 resistance of 40.0 4:vhi vhg,j; .jygc9hsqj s12 $\Omega$ 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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