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习题练习：Physics Unit19: DC Circuits
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 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 termint1l6ydhpjp(r i 1y5qabrf8 /+uo6rt-als of a battery, when no current flows to an external circuit, is re6 /1dutaypflqr ojhtyr816 (5p-+ briferred 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 terminal : uus5 fu4jxd,mjqxv5r+ioj5gi7:,xs of a battery, when current flows to an external circuit,jxdj rv54:i s :x7 muuj,xqf,u5o+g5i 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 connec0o:.l--bz,u p tmd1f25mhmlh( 3 rfoyrbxx*lted 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 connpt4kp*v s9 re*ected 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 connected in series to a battery. If the current6jdnr p ifo/gwdzw: 7sm -;6q; of 12 Aon sgrzq6:d jp;-/dmw 67 ;ifw flows from the 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 resistorfu-gle 1qp76c;w6 g vqs are connected in series to a 12-V battery. What is the voltage across any one of the resistorw;cq6u gvg6 e-fq 1l7ps?

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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 ;skmm yu-1 yg:yxg*r 9series to a constant voltage source, the power supplied bg:sgm*9x; 1ykm yr-uyy the 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 tod;o rcbm)wag(*a 7k6h 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 u5d+ta:7nktq8 y 2nw ein 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 parallel to a 12-V battery. What is5c4ot+,dnz2 zdnbaz 5 the voltage of any one of4 z55 nct2+,aodnbz dz 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 paralt xnwo x .hj**;6+qjp omc7;dblel to a battery. If the current of 12 A flows from the battery, how much current flows tj .7xj+hmqpx*;* 6bw ;dn oocthrough 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 l faxfij9p.p1sx6fj i/;:e 9a(pp+dc wights are connected in parallel. What happens if one lamp burns out? (Assume negligible resistance in the wires leading to the lamps.sa:x69ifj (x;c/9.pfefp 1 aidjwpp+ )

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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 (g vo5rkzfn52szf7*se-7 b b76eoec o8ks l z3in parallel to a constant voltage source, the power supplie(zfszlr s3 c6fe7n7bsbgo5-kvke8 e*5o 7z o2 d 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 of resistancexq7w2w8jlw fqt0+ k;b R. The maximum power each can dissipate is P. Two of the resistors are connected in ;lq2fj78t x bwwk qw+0series, 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 rule. g)faig:2vx+ yj0i.f /e5wd qg
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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 rule1-wwrvz3 o 6qkj-iqs+.
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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 ie30n db* (glzqs an 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 ari5 d7r(mdb8-gr 1kkz n 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 val riyw e a9g2dnr5g./h;id for the 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 identical storage batteries together in s+a k+jaza3vdejhz;v.1tb e;2 eries ("+" to "-" to "+" to "-"), and pljbzj2 ;v+daatv;ae z 1.3 e+khace them 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 "-" tl9qh - 5e0g6i 0ft6p qdus6wbv-qcw1zo "-" to "+") t-qe6c90q0db6f 1p6ugi zhw- swvql5, and place them in a circuit, 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 togetllnv8n 5. /dbd/l.r:2lj dx:c+ h hobjher in parallel, and place them in a circuit, the combination will provide/ v.cx j /2nln d.j+r blb8dhd:lh:o5l

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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 capaci(p lvrrap//kgs0 9/ artors 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, the equivalent cap*lq;kbhsd):qurfpsn:m- ) *f acitance of the comb:lp**: ufq mdn-r;kqfs b))sh ination increases.

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26#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Three identical capacito;(w8bevo ck*z rs are connected in series to a battery. If a total charge of Q flows from the battery, how muv*eck( b z;8owch 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 con c+//50i6 qfsev t gvydv5my*hnected 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, 30ljq*aa-u n xzw50e0l;ycrz the equivalent capacitance of the combinatio wr5z0u*n-a;3 0 xalyqj0 leczn 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 parall,wa+q3dl0ve3 sgb dm4 el to a battery. If a total charge of Q flows from the battery, how much charge a,w b+sl3q dv4dm eg03does 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 quantit ior 3)y,9vn/v.gg 0wxtzknk)vpk 6h8 y 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 o/7ma02kzzua c f constant terminal voltage. uzak0/2ma c7z 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 batu7xe g4 *xj,pltery of constant terminal voltage. At the mlxj gep*u4,x 7oment 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 are connected iolv.(x+p xsk:l sv2 k(n series to an ideal battery of constant terminal voltage. When this system r lovx+ssv( 2lkp.k: (xeaches 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 sho-rtwnhk 62+5k6v udqps1t ( bluld

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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 the addl ngu o3t*e5 siphd7(;ition 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 an ammeta3m 6b7y quw+rer in a circuit consisting of one rbmr q3au 6w+y7esistor 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 of ancbl+k mtk(6 +bdd;q:r 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 from2d2gfk ((xfnq 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 v3h i iuir:-wi,oltmeter'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 placiwy541*l)k n yu*jkle gqnci,*ng a voltmeter across a resistor. What happens to th ,y5y*eglw1ni *nj*kl)uk4q c e 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 j-a3) k ewpb,b+2a alkis wired in series with an ammeter, and a voltmeter is placed in parallel across both the resistor and the amme3k el,k bw+)ap-a2abjter. 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 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 with an ammeter, and a vw;sn.xlo+ e*z oltmeter is placed in parallel across the resistor only. This network is then connected to a battery. If one computes the valw;s. l*+exnoz ue 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, and -py3h jdkj*(.xjm2.f y2wdxt4.0 $\Omega$ 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, a/) .qqs2gv hzand 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,u2*nfc6) 4 akkoise; t 12, 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 combz qsutb4b*) hl: tgvms)k.)x4ination 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 dxlkbkv/t +6d8 )yj2 sof 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 iu h353llx v1(vm v;bstnto 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 into a parallel combination ;myrb30p6rm9s q0ka ); nicxn 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 /4xdx :zqs)k:1i 6mai 9eqcpf 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 appliancesaq-3aojg 3fp6w* sz cyd)/xlx .+6 waa are connected to a 120-V circuit: 1200-W toaster, 650-W coffee pot, and 600-W microwave. If all were operated at the same time whaj+3wcd)*s. f op 66y/gawx za-3xa lqat 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 parallsp.lzkcf.g-s k 1 ;w.qel in a f 1-w.;k splk.cg.zs q120-V circuit without 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 2.0do8(t2uk uz 6v $\Omega$ 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 and 3050l d+nppf6fq $\Omega$ 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, 6.0, av6xwt 6 jndzq(c1xv 8;f hyi8;nd 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 9.(q (c dm;wvjil5r5:y q0 $\Omega$ 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 9.0e8* *h xhs+lqk)x b0lc $\Omega$ 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 9.0s zys)n;ukke )der5 40 $\Omega$ 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 th.;+n2 xqr a 2vrlc(zc jshh0;-e mrs(le circuit 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 throu3)eyae tl6,9pt ded rz50:9fwbyhr 1jgh $R_2$, 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 szoa,f. *c y:w8 o wdm/k6el*fin 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 in theukku e11ftn*3+8mzgp 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, determi : mf;,rf/9hrsmv zim5ne the 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. 19-4, determine the currw6 zwt -n mxdwrjh86z7b1f t0*ent 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 hego45 4+da dk1mx(e8nba0ltpoint 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 poic0dx : .wlgva1nt 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. 19 6rw7n*v2*v/ zf ieyxu-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- q;-s.(icu u6 qf):j9lqurvpf96tzx y 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 qp )w2d 4a/su2fjdkhfl 9 oq(3point 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 the 7 / /tdkrwz dssv(9 e,.lf3b6fx$\Omega$ 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 t22mbwkn 3,i zv8xd2qvhe 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.d/e* m: n ,+5k5hfzpxgifc nc 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 is 1 n r-9;lb1iydfnx-mn 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 10u3 ,m5r uasgljyb m/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 connecting .wc/ jq. r1vtcthe upper left and lower left cornj.tc/w 1q rv.cers?

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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 capacitancd fki:)fpxyn0 /-zp4qb f..lr e of this combzxpyf) d0p.f-/blqrk. 4n f:iination 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 capa* vvkmcut 7 24+h0sck6t+ehcfcitors are connected in series across a 12.0-V battery. How much charght+6cmu hvv+4 *tsk2c 0k 7ecfe 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 series across a rr)sx/f/ra +a 12.0-V battery. What is the potential difference across the 10.+ax/)f rrr s/a0-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, dezul zt+ ft:7)rev2 series across a 3.0-V battery. ut:v+t2ze 7rez d,lf )What 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-lhed dh-0 pj*.0-V battery. What is thepl*-dhej 0d -h 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 hnm*0g67f- enngy ng09;icjrmvv7 m 3a 24-V battery. How much energy is stored in this combination when the capacitorn*9;3egvcg 7i -00nmvhgnymm7nrf6js 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 con;agnb ) ldil* i5.y3mnnected in parallel, and this pair is then connected in series a3gyin) 5blmi*;l.dnwith 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 anvua hu )8*hyc-d 8.00 mF are connected in parallel. The combination is then connected in series with a 12.0-V battery and a 14.0-mF cac8u- )uvayh* hpacitor. 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 parallel. The combiv 4i:o3b2imxy nation is then:2b 3 ixomvi4y connected in 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 8) eg ly+q zw -nie2owzbk-/y/are 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 voltage across the 6.00-mFgwyle/ze i8z- +/wqn2)y o-bk 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 throughea2;+ t k)bwrs 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 V and then discharged throh5 n szt /( :.l*vuw g8l4jqcykp(mdmnn*7ja;ugh 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 in series with a 0.50-mF c2(o7w u5 aapwlapacitor. The capacitor is initially uncharged. The RC combination is charged by a 9.0-V battery. What is the ch(l5wa u2ap7ow ange 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 th -fap5n1aa9do6zk-9qusop nb ) o+h(j en connected in series with a 3.0 z nupp9nqb1d9jf ao+a-ka hs )o-(6o5 $M\Omega$ 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 100 )aw w,ae vfppg n8toh.+ti0(1$\Omega$ 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 co;7v n*9 cgfc3 dtm2ch1luy9 tgil with 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 resisz qk:fghamy:2i.i7z0xju -v5jk m l0+ tance 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 re oecf,5jl ,yn+sistance 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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