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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(- me ;zb: icm.)12twfrllrofb9 8y zz between the terminals of a battery, when no current flows to an external cirz lrbz(- f icleo)m8.t9fbz 1ry;m:2w cuit, is referred 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 current flo) paacws)/o /sws to an external cico))/a/s paswrcuit, 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 clind6 sidm5- + 1i l6s*znct)9:yfuxg onnected in series 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 connected in s-z7; yc3ukh* x9rt avzeries,

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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 connected in series to a battery. If thhn:0 -hzp: db yw.9uece current of 12 A flows from the battery, how much current flows t:dz heyh w .cp:9n-0buhrough 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 i mxjzw-mp *ek t6r601(g)lhcjn series to a 12-V battery. What is the voltage across any one of the (0z- pm k *whj) tem1g6r6ljxcresistors?

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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, h:clb x:,ma b m: bwe72zw1+ppthe power supplied by t::e+ 2p:x b1zcph wlb mw,ba7mhe source

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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 p,nrw6)q goy5a +(zk kkih38d 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 pals pd9lx+-8odb*tur 10+ kz/ yj krsw5rallel, 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 paru50 v+wqb6jbmallel to a 12-V battery. What is the voltage of any onm560qbw uvjb +e 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 conne9 .bnbh .vi4y sxe (p/v*4asngcted in parallel to a battery. If the current of 12 A flows from the battery, .b hpn.9b4v nxsi ave* (/s4gyhow 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 Christmas tree lights are connected in parallel. Whkxgb/dg( ar 41at happens if one lamp burns out? (Assume negligible resx/dgkr4ba (1g istance 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 s54n-d l 0,nlt1+*ypznhkx qylource, the power supplied by the sour+4zn l-qlnk p1l*d5x0,yn ythce

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15#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Consider three identicalithgzx fbt x6 o23.u/4 resistors, each of resistance R. The maximum power each can dissipate is P. Two of the resistors are connected in series, azhb x.i u6g /x43tf2tond 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 junctif *+sr.4lwqfdm oohtx5ct -(4on rule.
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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 rule.mvwp kq;j.dedq,, 3 v2q 8rvh6
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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 y81f),u;munmf/ +e6llv k l tuan 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 ief b1d.fn 46v6bpim, 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 the circuit u 3pwsr0k8n(ashown?


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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 identical storage batteries together in 8rcwj1g1p pu-series ("+" to "-" to "+" to "-"), and place thg-cppw1urj1 8 em in a circuit, 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 series ("+" to "gfcfbrf 77z*-g5i/3 tew- qcu8or,bd-" to "-" to "+"), and place them in a wgtbudr fcz,-r35 ge*cb7f /7-foi 8qcircuit, the combination will provide

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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 parall kj(yd9uw,7o tnus4 7a;; *b5snxzf4emu8y aael, and place them in aox;stabn,(7f ;j 7kwuu*9eas8nuy5 d 4a m4y z circuit, 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 capacitors ared9e h u5-gsg-x 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, the equivalr15+y2lqr ms2 3 opx*0gja owrent capacitance of 2ro +sl25 x1wpm*aro yg3rq0jthe combination 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 battery. a 5km 4azd9(yxb lv:w17mu :crac4:iwfsuk38 If a total charge of Q flows from the battery, a uzs1x7rk lm9iw85:f4bk :(c: mad wac y3u4vhow much charge 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 oy86i 8mbvq q 5 :466joxrhzmrq vf4.uconnected in parallel 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 capacitanv3.)wdm c nl4gce ofd4l 3n.gc mwv) the combination increases.

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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 parallesyvn sl)rb.pg pf.;j-w, enh 7q;q w25l to a battery. If a total charge of Q flows from the b;h l q7q,pn .bw;.)wp j2syr-sgevnf5attery, how 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 quantitea8z. ias-+ezy 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 capac,uz z c wrjzdww0sf /r4)eq796itor are connected in series to an ideal battery of constant terminal voltage. At the moment contact is made with th47 ,qrf suc ew6/90z)wzw zdrje 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 capaci:q4gd 3c;ml2:irmnvx sm xi+;tor are connected in series to an ideal battery of constant terminal voltage. At the moment contact is made with the battery, the voltaidcmqn+ : g:xl 32ir4xm;v; smge 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.;pn.:rf0ylqrckpc: 2tqx /4ir- ptgf3 /ci p series to an ideal battery of constant terminal voltage. When this system reaches its steady-state, 3/pglkt f.:iqr0cr4i xpqcy; :n pt/ pcf2-. rthe 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 shoubq-b. d;sjk l8kbk84kld

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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 an ammeter by theig5 svtz/,.2 3 1ygrr uaia.vw 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 placin6p m8b,lah* ing an ammeter in a circuit consisting of one resistor and ,ip8b6 ha*nml 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 of a23,a)zg iuvazn 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 a voltmeter from a galvanome3 7pbmm3gp6*uka7ee lter, 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 se)-w vi5*t tv:jo*vgge 7ij9rdries 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 placing a voltmeter ax0obnob6 b*on+.df c5cross a resistor. What happens to the total current flowing in the circuit as a result of this actiobnox+.6bob0co*n f 5dn?

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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 pla.0ihg7,a bi* 4zmb qlgced in parallel across both the resistor and the ammeter. This network is then placed across a battery. If ob, 0b4*ma qgg.izh7i lne computes the value of the resistance by dividing the voltmeter reading by the ammeter 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 wired in series w*4egjhc2 *j,, xmp5.ks vje ffith an ammeter, and a voltmeter is placed in parallel 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 je2,k.c, m j vsfhfe*4jg*5px 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, andw*t o 88 ii2-ydpp dkr j;jsshp(z0)f4k-uq4c 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 nef7t:7hx7brs sj f.8d( x1ab6.0 $\Omega$ 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, oj3p*lv0 xk56k-u yjf*xl1qo and 6.0 $\Omega$ 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 series combq/ 7y4,b3wyibc jzhd zkp5f+nvq5h11ination 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 of8pfk p-.lib6)jpveoof (x,x7q1 n 7into a series 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 parallel n5bp3oya *axa*dy 6a 7combination 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 pa/fq ;u ziw7sa(pfc4uc ,2 8xfirallel 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 mv4no2a(h/is 9j d7yi 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 applia:(ws7d:hfsw rb(91 y 4pyx xglnces are connected to a 120-V circuit: 1200-W toaster, 650-W coffee pot, and 600-W microwave. If all were operat bp (y(gy94xr7 ds l:sx:1wfhwed 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 p.tm1 +va, x 7csygq67o)/erczkk5aon arallel in a 120-V circuit withoq xn7aa+. y e7/v c1kktr5g,o6oczms) ut tripping 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 2.0 r 8omayeo ht5-hav8;(s2npu8 $\Omega$ 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 4eb r zt*ucs2+4d3bwf 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,dj: me qer*a6gab8o1 : 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 d/c63gsmy n,a4 ooq h,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 a ge ccd8g c(:qca9q-c, duaaezk25y16nd 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 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 and f cn 3mrc.+qus 4x:z6n9.0 $\Omega$ 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. 1rjc,v9sl s4+t9-2?


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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 iub;kqj 3e g5(3 kndasz+ui) mjxr3,0$R_2$, 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 ofy3vi5n m4 j-q*8r bwyv the circuit 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. 19-4, determine the current 2zyc og46fqb)6. hrur 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 c7yrx/ rmp:2m. ohc/wpurrent 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. 19-4, di/vb 7y,qd6pt (rt 09cy7me dqetermine 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 rela9t31sr-qe5i uhoibka+ zyw8 /xs9 j 7etive to 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 of point B relative to point C in Fig. 1 up0 b tzvr/g0-4trcf8; ofgz+x2 loa.9-5?


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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 pointgv- j 7eydpx2:r wv.1q D relative to point C 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 b l1)c2dr s jyxf7d o;4tt;w2fnattery in Fig. 19-5?


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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 A to pointgd)0 3 rlm7g/ms(qqs r 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 thdzbq *5hr89s qe 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 curren:3rg7resjv5iw2mfgd2 r3 xk ( t 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 c1epfd v:2(fu in 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 in the 1:72qw5x). 7l uk*b iwc4x m-ixk ckwod2 $\Omega$ 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 thegx*nzcxi k+)3k w tn;;zw,e- z 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 solid wire connectinlb:3jf0k wp jdj 3-*pu0e+lcz g the upper left and lower left cornpz+uwlej*jd-b fpl : c3k003jers?

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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 equi7*0xnzasdi/3 vvdktrd vh/:-u 0 umc4valent capacitance of this dcxz* d/ s /u-7vd0r0n 3tuvi:4ahkmvcombination 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, and5k 1, wxd 9tjp*gqiiv: he*f/d 50.0 mF capacitors are connected in series across a 12.0-V battery. How much charge is stored in the 5.00-mF ca/g: 59hji*kxqit* 1fdp,vwed pacitor?

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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 arzx 1/(-:s2q j ydcbb+n: kra8 ijqnxgt +wkh,:e connected in series across a 12.0-V battery. What is the potential diffiq,j+-ks:kdq/:nxh +1r ygc w( az8t: bx bjn2erence across 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 series , hd;7n;ljoyp8-a qrs across a 3.0-V battery. Whaaoy ,-;hnjqrs p87d ;lt is the voltage 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 capacitor are connected in series across a 3.dc/ fgb 8v9m zdl/m .t+e8ps+i0-V battery. What is the voltage across tsp /i+lv+mgd8tb mz9cd 8. /efhe 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 24-V bmh g-1f -:m74jnvwxdiy3 : kzwattery. How much energy is stored in this combination when the capacitors are fulfngw41kw yx7j im::vd3 --mzhly 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 parall4 6ams(a. 8ctbs; c*uefn:quiel, and this pair is then connected uian6c*umat.e;8(:4b f cs sqin series with a 30-mF capacitor. 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- 6dv0pj1+oxhiymu g ).00 mF are connected in parallel. The combination is then connected in serieh u jm-v0 g+p)yxdio61s 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 6.00qj o uuyce9b3y6dcc kc8(y*1eqo11n 0 mF and 8.00 mF are connected in parallel. The combination is then connected in series wit 8ccj0(k q n1 6*e3e1o ydyoy91qcucubh 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. Th kku nkv()w (2vd.4muve combination is thenvkk.m)2n((uvuv dw 4k connected in series with a 12.0-V battery 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 ttn)vjx 4ik7u( 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 ch y8bb+u.*0xc jmvv 2bgarged 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 con(zrh14*gbx u0 ix w ax7afb/h;2spd.e nected in series with a 0.50-mF capacitor. The capacitor is initially uncharged. The RC combination is charged by a 9.0-V battery. What is the changab0w7 *;x a.shiz2fue(hpgxx4 1 bd/re 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.x0lic )qb(54z:y qj- d+xzk ki0-V. It is then connected in series with a 3qbkjil 50k ) :qx(x-icz4d+zy .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 internal resistafd 41 cja1aexnx,v21snce 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 wusb5sisc ql6n. la0 f(m8r) b+ith 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 internal 3x gtgojfkv1t+m7m k:196q; ir6qhreresistance 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 as fuk3db8tojf n i/pn,+6mb72 coil resistance 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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