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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 terminals of a battesi;3,s p x3o8eakw j/mry, when no current flows to an 8ap s/e;,x3wmj s3ki oexternal circuit, 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 of5d8 hi**;/5mdjy frqg ko(sbe a battery, when current flows to an external circuit, im*rok jq y/b g(dd f5is;*he85s 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 resisq);mhjv9 (tvc7.e*t l ckwzv0 tors are connected 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 invq;lk s0 g5pxz8w d0oqx1k-mntl*v:0 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 .wnfw)h; eax4sfq /7q series to a battery. If the current of 12 A flows from the battery, how much current flows through any one of the resistors?f ;xwa/)nhsq 7e.4fqw

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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 series to.c;0m /:u4fxt:fp: d xddgscr a 12-V battery. What is the voltage across any one o0c:tgcdf4f.:x/d mrdu;:xs pf 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 iosj ;/* oaq8vx y w:ckc.rj0t+n series to a constant voltage source, the power supplied by the cjow8a.0: qr;*v/ tsj+xkyc o 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 to*(cl;rs lna8 fvl 55mhgcj(z+ 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 w8w,n4bhz( 9 4g sntmqa)qhv 6be 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 pb11 lh 4v9ckzcarallel to a 12-V battery. What is the voltagekcclh1z1bv49 of 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 battery. If the curren .jg qdw1qp1hiee iw89ux3w( .x1lp4 tt of 12 x .1 1l9u3w1eexghi wdpj p8wt 4i(.qqA 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 Christmas tree lights xg y()x;t:zyhare connected in parallel. What happhg;xy()z t:x yens 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 source, the )f5a8y92c ofeyrp.aj power supplied by the 9y2fa ycao)8e. pf5jrsource

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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 R. The mael p dtao,+r:gbrk0rg/( 3e *eximum power each can dissipate is P. Two of the resistors are connected in : rg(k +0tl3adobregee *r,/pseries, 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.p -b9q)tv jtjgx 5zi4 xa5k3/y
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17#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
State Kirchhoff's loopv j m9eu6 puz(0aa. w(r;8x+velib4sa 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 example onfm6mxt ,0cx 4f

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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 cbx 63a;re6koe 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 equationsvc 7ka9zf 3y m 66js,d4jqzsfp60 tyc) here is valid 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 series ("+" to "-md-otjm+6fkfgv b 8+," to "+" to m 6+bmg+8tfk-ovfj, d"-"), and place 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 identicaljyipyd .e8kb(c y*(3 o storage batteries together in series ("+" to "-" to "-" to "+"), and place them in a cidopy b. y(kie3 8cyj*(rcuit, 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 parallewd u65x 0 he5rgaa*8jbju+ 4 jlp9xha6l, and place them in a circuit, the combination wilp8g5x9 0h ead5x +jau r6au4whj*jb 6ll 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 connectedk:+0u)b kwuq e 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 sepn*vivku qonn6 7*33zries, the equivalent capacitance ofn * vzoi 3un3*6qnkp7v the 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 seriesa1/0gujp2r8tj j m0ojp7 j6qe to a battery. If a total charge of Q flows from to70 r8 jjejp mp/jaju1qt2g 60he battery, how 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 conn khm1g3;eg 0izected 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 capacit( 42obhi 6cppq;2 e( 2hlcmtx 7z10oliylvo)sors are connected in parallel, the equivalent capacitance of the combination in(climhx p1z06bi p4yto7eqs2l;(cl 2h) oo2vcreases.

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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 paraly0w( j z/g6rsmozfr-(lel to a battery. If a total charge of Q flows from the battery, how much charz (mg/z6 jsyr 0(orwf-ge 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 RC?qus-w*nr72au( c9vg w

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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 batter uw yo 5z(rws)5*d)*bnfr3qpky of constant terminal voltage. At the moment contact is made with the battery, the voltage across the3fr(*5p* 5ws )kb ynzq ow)rdu 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 )*pd9s;ouf 1(nw8 taabbtep: ideal battery of constant terminal voltage. At the moment contact is made with the battery, the voltage across sfbt*ow dpnapa ; t)(be:u189the 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 serp opi 2f23b0xuies to an ideal battery of constant terminu0pob2i3xf p 2al voltage. When this system reaches 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 shoul4)lof 2rk6ivtd

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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 convee2qw 3 dtd,0gerted to 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 an 5a:q j3ap k+m 9y(ojsam2u z(dammeter in a circuit consistpm a5( z:ukd(aao2q sj j9+my3ing of one resistor 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 resis1 8w-ebst4 qvltance of 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 constructu2- y3wy1cyjg a 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 resistwlr3hh mv.. ou v0yo,j 4+-9rvcgww6xance of 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 placing a voltmeter acrossck0 hm 9+k5gh.gdpp7o a resistor. What happens to the total current flowing in the cir 9h.m70gph5kkgo dc+pcuit 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 anhd8f e:;wtcz 5 ammeter, and a voltmeter is placed in parallel across both the resistor and the ammeter. This netwt 5fhw :dc;e8zork 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 ser(7li6o7ynz/c9s4a l1axy df zies with 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 / 7zyf9 6szl(ac n7o4ayi d1xlreading 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 4.v 44bs;0+ e,in9uw+wv upl hdf0 $\Omega$ 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 6.5kbm* 5r;r5offu6lf )w ah6 dm0 $\Omega$ 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(*c: qd+x mjc,bd(+/ auepj)o1jtd jd 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 combl7ef0z :)r5d oo(dvmbination 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 6 7dwv0jie-1u hmv 2urof 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 paralleey nokhtqwrf 5,l l0;zog,74:l 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 pal6n8) 1mk wfcwrallel 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 into a parallepwr6ctgrnh ny1i; )g2e sa+o;om:3 7fl 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 are connected to a gs j+bq : it*e1np+q;k120-V circuit: 1200-W toaster, 650-W coffee pot,:j+sg+ *1b ik;p eqntq 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 bu*:ah z,rk i0uglbs you can connect in parallel in a 120-V circuit without tripping a 20-A circuit breaker?:guz * i0ark,h

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55#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A combination of 2.0o2tn-w *(yrd k $\Omega$ 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 9vv- cymk xs-4owg59 l+w-:ktt1oyuq 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, 6.0 m9k+kgo3kz3r, 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 j x2b.iuis9zk7w5(y j 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 9.0 n.90 m ;9na f4wwb wzbr9c5/rx.a zmji$\Omega$ 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 anp-xa::d iehwu8f)dt 5cq6n 5id 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 circuix mz)kfl:1(so-g 5f+w csb8y 0cezj,et 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 throughumeb 5 wp1;x)fb26n5p zj9 ukg $R_2$, 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 cirzwxvfbwhyai ;caj: k v)csqwl4 9r1/n:59w.4 cuit 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. 1; :olj*jnipk99-4, 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 t 0 n/z tk8:rybh9qdl +4yyst3fhe 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 t meq9wfy0xd0,e-lm g 1he 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 oinz;nk7v:n+2mn s . rifs8a) 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. 19-/9uolj pj(q.pntcb x-x 87)5fid 4s jy5?


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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 poa 5fw+hosb7v8 int 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 f7w2z*kt )dh/j ipdd/srom the battery 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 fromy 3 u-rkzg5xqd2ctx6r rv -f7) 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 tiw;cz 3fcm;4dpvkij ( y s323+hgtqj/he 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 the 8ay9jh)w5z r3 h $\Omega$ 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 the 4/u +k )vmxmb)*/bjwcp $\Omega$ 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 ic5 hdqozmjuv17. (b o;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 in tf*. tiijm553 e4 uql1p(wysij xd4*t lhe 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 the upper lun a(4xx5neo 3eft and lower left cornersax4xne 3(n ou5?

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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 equivale w0:zz7qn0ls7vouwp3 nt capacitance of this combination i lupz077w3zs vown0:qs

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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 cp+k t) 2y,iy do+ 7ycmn-s3u6xmjxa8yonnected in series across a 12.0-V battery. How much charge is stor ma-xk,otj2 y yim7 cu)8x 3py++sdn6yed 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 conn) csf uvlvagh80-hus5 c2e,r -ected in series across a 12.0-V battery. What is the potential difference across the 10.0-mFcah , r hg- vulfv2s0)eu85cs- 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 siwy.6t d8zjh2 eries across a 3.0-V battery. What is the dh2jwyz.8 i6t 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 3.0-V batokao 2;-;svgwtery. What is the voltage across the 2.;o2ag wsk ;-ov0-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 arel)4fs+ u8 ust jj)y;ha connected in parallel across a 24-V battery. How much energy is stored in this combination when the capacitors are fully chajssu; +u8)lay )t hjf4rged?

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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 2j(+bt ul+l xo30 mF are connected in parallel, and this pair is then connecb ux(l3+j+t olted in 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 8.00 mmvu j0ed s ,*g;uuup;6lr ad82F 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 equivalent capacita drsgj 6pal8;,muu;0 *duvu2e nce?

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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. vilmr; *k ,1uhe;uhxy:8hg3(s1 sfe p The combination is thh m*8h syuxu3k s;,fi1vh;1rlg:ee(p en 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 are connected in parallel. T ml (;wftd4qnt- z 90oy,huw5vhe combination is then connected in series with a 12.0-V battery and a 14.0-mF capuwlhz q59v4t-0w;noy ,df (m tacitor. 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 through0r *uivg m-kqw :2:cvh.56h)e pslhit 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 disch.k f3fo ws:;ea: xsb8+d9bif parged 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 in series with a 0.50-mF capacisd)eytpg7e41 okt-( g skdtk. 1-l.hrtor. The capacitor is initially uncharged. The RC combination is charged bghd)o4t1.-ek-ysg dl sr p.ek1 t7(tky 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 then connected in series wi i-qhw0+s;k-a.desge wocp8/ th a 3.08; 0s-g -waq epk.dh+ewio sc/ $M\Omega$ 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 int/ lcdsh(c, m92(xx-ap5ydorc ernal 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 resistance of 24.0 mp:3wxs*+ lky$\Omega$. 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 resistance ofhk 60vbx m1g5m j,b2/flwuk- f 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 rb )e*o7-8jehgkquq*qq7z m0 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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