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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 b5noigy3nmz7(j*r4sw: z p 6ybattery, when no current flows to an external circuit, is referred tybz w5s4o*jn yzp:ngri7 (36mo 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 betwee h 1ibl8olz;wjk)ha2,n the terminals of a battery, when current flows to an external circuit, is referred to zl l;ihk1b)28 oh,aw jas 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 t*j fu 42fc)snvo 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 connecteu aw((n: )dkvad 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 serlcm. ;b7yiq( ries to a battery. If the current of 12 A flows from the battery, how much current flows through any one of the rem. i;( 7bryqclsistors?

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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 a 12-V w9;y1e,zrca kcn9 i2s t0yxx*:l eu 8vbattery. What is the vxe c9iwev1r 8z:u cas0k xtn*l;,2y y9oltage 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 sourbcva /(3gn3coce, the power supplied by b3/cocva( 3 ngthe 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 in6+;vqr i+d +bl -bhnis 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 ino9w6o keg 4tjjd .y cod;pm)e*y 4kr*6 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 cov+i a7w7kxq3x6 ob6 pcrvy)j1nnected in parallel to a 12-V battery. What is the voltage of any one of the resistors?+aqic wx7j63bypv1)7v 6kxo r

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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* dj2:fkev k+s in parallel to a battery. If the current of 12 A flows from the battery, how much current flows through any one of the res+jk d e2*:kfvsistors?

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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 Chri/earnpef 5 1ax40h, kjstmas tree lights are connected in parallel. What happens if one lamp burns out? (Assume negligible resistance in the wires leading to xj pne0are5f,a4hk/ 1the 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 aavw1tk otie/b o: xtx+3*v3i)dded in parallel to a constant voltage source, the power supplied by the sourcaxi:t +xt1oo/3 t*iev bv) wk3e

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15#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Consider three identical resistot3 t8hfly(2 qors, each of resistance R. The maximum power each can dissipate is P. 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 diss3 t y8qfothl2(ipate?

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16#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
State Kirchhoff's juuuxlsnw24*,z nction 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 loos z-()of9avv rql1ao s1at/ p5p 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 ehq;8l 6-bd*mu d r j9q,ky(nfaxample 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 o +y*fs*+ ubtbt gko3)ef

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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 circuim:zgn:6 i6dg3b nzp0- fg/cjdt 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 " nac.fwq5b.s87 nr5 je-3 bwjwtv2(pr-" to "53c(t85 .frbn b7 v.-wwsaqr2jpjen w+" to "-"), 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 identical storage batteries togetherzixjuo. s zaaj;:1 )n, in series ("+" to "-" to "-" to "+"), and place them in a circuit, th1) sn.zuj xaaj:i;o ,ze 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 stmt7t pk+44y4u- imjt zorage batteries together in parallel, and place them in a circuit, the combination wii-pyum474ktt+jz 4mt ll 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 conneccg1(r*e 6viutted 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 co30xjm b5arr,cet y(( nnnected in series, the equivalent capacitance of the combination in xmc,(jny03eab (rtr 5creases.

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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 tos,u)exn suxl (,vaw +: a battery. If a total charge of Q flows frow lus,un(, )xeax: s+vm the 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 connected in pab3dj;3 w; xxhgvj1d,xx 7 ev;nrallel 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 conzn - 5a*,6v/plpaxveyvkdmz/v) .+ svnected in parallel, the equivalent capacitance of+ -p v.ze5slma//kpv6yvdx*nv, zva) 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 connec1xj*je74 xmtl ofuj h6vu4 l64ted in parallel to a battery. If a total charge of Q flows from the battery, ho 7je14l* fvj6h xuu4tj6 x4lomw 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 4je tz:2sxn 2pquantity 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 connectedg3xckd * y.i/,wa24d q z5lrfj in series to an ideal battery of constant terminal voltage. At the mo .g3i j2f5 rxz dd*ka/4qcw,ylment 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 connecime 3mn 2p **01a j8gsm8iksnwer/8kmted in series to an ideal battery of constant terminal voltage. At the momeg*8sm2m*map 0jwn nmk18eri/se 8ki 3nt 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 in series to an ideal batteq) -d5puvh+w yqi6uk 4ry of constant4+5 -6yuiqhw dp u)vqk terminal 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 shoul gtm),u+ qoh22 (tfdkmd

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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 ammetuzye,r: 7fjj 6er 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 pl5uln6-l-au ws acing an ammeter in a circuit consisting of one resistor and one battery. - ll-a nw6uu5sAs a result,

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37#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Decreasing the resistance of an ammeter's shuntpfbb h )vhlect x3upjf+35lu*a.8 )a9 resistance

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38#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  In order to construct a voltmeter from a galvanometer, one normallyta2zto0 :8r a8 cw1cbo 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 n n5zjo++sizevz e*2i hm,5-bries 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 ispvgqfu-7n)7 q obtained by placing a voltmeter across a resistor. What happens to the total cug7vnqf7qu) -p rrent 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 series5sz jr(gzxe)3 with an ammeter, and a voltmeter is placed in parallel across both the resistor and the ammeter. T)zs5g xer 3j(zhis 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 ammet 0p9x n; olpy:vtn2 ,fd698fdg yrgw/oer, 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 voltmeted9rng,f0 l8 pdy x:o;o2tnvw f69p/gyr 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 kn1 utd,is2fx2 j;vj* 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 1nr2)ajf :q0i+7ysjwj8, y 6uwujwep -2, 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 6.yq-jt:z x6 mo10 $\Omega$ 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 seriesmn,ez9-* sigas /lv7h 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 a 3.0gz7 vi / t ;8f-h24ihlrqpdg/h $\Omega$ 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 z b jri 59pvgrg-i,5u/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 of a 4.0v vuguhj65c8 g-7s* dn ec,w97w :gkng $\Omega$, 6.0 $\Omega$, and 12 $\Omega$ resistors. What current flows through the 6.0 $\Omega$ resistor?

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51#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 22-A current flows into a parallel combination of zhc.694ux z* kq3er oc9vfnw*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 120-V circuit:9 3o/n x2;e9falodfeg 1200-W toaster, 650-W coffee pot, and 600-W microwave. If all were operated at the same time what t oofn2af9exl ;3ed/g9otal 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 5m 4mew8a1lne100-W light bulbs you can connect in parallel in a 120-V circuit without tripping a 20-A circuin1m45me8ewl at 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 2.09xjpu5ev )gt y.rw -;r $\Omega$ 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.p7suen1t; da d 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, 6ug kkca4g 4s;,l fdrc07ek5w and 10.0 $\Omega$ are connected in parallel. If the combination is connected in series with a 12.0-V battery and a 2.0 $\Omega$ resistor, what is the current through the 10.0 $\Omega$ resistor?

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60#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two resistors of 5.0 and 9vyvebkb;(l)h+tgrj lv(5; n hg :w /.s.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 af)l8ujn8l pr,ro7 au0nd 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 ha(39 n-av b fv6gwit(ersy*+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 resi9 dh 2ppc0yq1kf9e n:omg ;q.sstance of the 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 throughi0 ) a*e 5ek3sweoy(rl $R_2$, 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 oj:c g t9- 2xuzfr,mn0jf 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 Fik4 j5la g,q4gsg. 19-4, determine the current in the 1 $\Omega$ resistor.


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72#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  For the circuit in Fig. 18ppc cd2u-0h bfvjj-j .di6/7an pj 2w9-4, determine 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 current in the53 rkvpsy/ lw.v)cn ;e 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 point1x7 s89jyxr 9dmetor / A relative 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 poi9hi(;la3ync f+bvm1xnt 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 poin, 0 q1- ondrzimy+l1.iwwif :nt 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 fromzaq 70upv/wxjdt7*p( /llhy( b1 *se g 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 f+l0j:7p iask3job 5xgk z01fzrom 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 int dvkbh/rsqn6-5bb 9 7 the 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 inir1 60-zxt.3bsv0rh, 7e a ,qdfn 8yrkvpl4wo the 8 $\Omega$ resistor in Fig. 19-6.


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81#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Determine the current in 0k z :e79dvqo*yph;mjthe 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 7i1qca) zql c/:x1zaithe 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 dtu1 p * gr,u/v3+t jzao,s;wf18 $\Omega$ 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 connectiuw lqfetn )mw8 f 2-r/b2gp.ai3ek+/png the upper left and lower left corbr.fme2wifl 82n/-kp3+ pt ua)wqe/gners?

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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 ck8 )gobnf* w.equivalent capacitance of thi.*8bwn)f co gks 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 *; /r 897rrkss 1zbmmg5njs:surzh-n mF capacitors are connected in series across a 12.0-V battery. How much charge suj b51s rmz7sr n;*/hn8rz -sg9 kmr: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 capaci6ph7io:oqgdm hv+hsy ):ydt9kz7 m /,tors are connected in series across a 12.0-V batt v+g:sohy 76i:po hy/dmtd,k)h z7q m9ery. What is the potential difference 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 cap:6lft/ 4z tdtdacitor are connected in series across a 3.0-V battery. What is the voltage across z6 tft4tld/d: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 ar-3;hk(k ai +orj7xpnz e connected in series across a 3.0-V battery. What is the volta kx3 (+;hnopka zir7j-ge 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 mFw f6ryo4iz-:r capacitors are connected in parallel across a 24-V battery. How muyzr 6:4firw -och energy is stored in this combination when the capacitors are fully charged?

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91#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Capacitances of 10 mF and 20 mF are co18sg3 di6jlyoapj .;s v6 2 9ce3.ie(zlvf gjrnnected in parallel, and this pair is then connected in series with a 30-mF capacitor. What 6j .csdazf(g3y jj 9es;v8lgro l12i.6ivep 3is 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 m,rfg fglg4 t26io;ax )x z*t5iF are connected in parallel. The combination is then connected in series with a 12.0-V battery and a 14.0-m*l5 rtg2iiztg x),afg4ox6 f;F 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 parallel. The ri3p;rp. h ri /m63vuf8gqit2combination is then connected in series wit6u/it m2ih ir3p;rq83v .fgrph 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. They1 3utm;sc c.z combination is tht;cmzc.31 suy en 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 charged40xlz,gs:d w* hy.u iy through 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 xs;c)8 p /8jop,w qgwb3q/kwlto 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 cody6:wg)x5dnzyr- f ( g +amp1+p yz/alnnected in series with a 0.50-mF capacitor. The capacitor is initially uncharged. The RC combination is chara)z6y1( x/n-wr g5:z y+mlagdfpy+pdged by a 9.0-V battery. What is the change in voltage between t = $RC$ and t = $3RC$?

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98#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 4.0-mF capacitor is charged to 6.0-V. It is then connecte;lu:zp5z x3n zd in series with a 3.0 z5zpnzx:3 ;lu$M\Omega$ 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 internalz4ab6jw cm 82a 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 resis x;m9eui.p+lnsi ;q 3u+sxxw d8k g1-etance 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 resistance,iadi, 8dl 3iv 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 replfbg2 )4g 9dzsistance 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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