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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 b/bevm ls 3tkf,95yry6 w3q.l hetween the terminals of a battery, when no current flows to an external circuit, il 5fvrw emq 6tby /s9,l.3kyh3s 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 rf4.):/ ki hbd0pshk*c5veyothe terminals of a battery, when current flows to an externyb e0fdv r5kk:)hpoh *is.c/ 4al circuit, is referred to as the

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3#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  When two or more resistors are connected in bp+; lpy;;trrxa* uh- 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 sen9xq-/z48 og/g mbsrsries,

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5#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Three identical resistori vud4l1v ( u7ivh4i i:az;1tfs are connected in series to a battery. If the current of 12 A flows from the battery, how much currf u4hi li4(idvu:;v v a117zitent 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 resistorh(ack*lzx 37h s are connected in series to a 12-V battery. What is the voltage across any one of the resis*h3hx7z lka( ctors?

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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 cov)por 47o9hc7 ndm a)h u,w0sxnstant voltage source, the power supplied by twocnsuadmp97 4)07vxhor ,h) he 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 connectn x/1thw-fw5hw5dn9m;wv3pz4oqw s* ed in parallel to a battery,

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  When resistors are connected jfm6idx7ar sli8 5 k);in 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 ykroenag :ty r-,4 a+nx*;zf/ pkb1j7sz+r -ca 12-V battery. What is the voltage xo;+ ,kr-fks yb*1z-:y7 cjgetzp+/a 4rnnraof 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 arvp,q9)5:w*tksias 9kcvd 5je e connected in parallel to a battery. If the current of 12 A flows k,tk*:jcv 5v)5eiaqwsds99 pfrom 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 Christmf nanjo 1t k*gh2m+4kf 3b2 (qtx *dfv.be:ez,as tree lights are connected in parallel. What happens if one lamp burns out? (Assume negligible resistance in the wires leading to the lamne f4(xvqnt: zk.eg1fb 2bhkfd2matj ,3+o**ps.)

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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 voltav6 7y ytm:)v ftsl,nh4ge source, the power supplyy hs7tlm6,v 4vn:tf)ied 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 1u: ogd+ q*nthi-9 euxof resistance R. The maximum power each can dissipate is P. Two ouue+d1 xng*h-q :9ot if the resistors are connected in series, and a third is connected in parallel with these two. What is the maximum power this network can dissipate?

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16#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
State Kirchhoff's junction rulsp;tph i+,n; a(fk:sfjtyi44e.
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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 ruyy m0 fc*8nznk o:n, 2d( )6bme7jsavele.
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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 ofwws4 s(jc. hq:

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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 eowyvm y:nx: 11ppd5 fjt-9m3gxample 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(j wcq0xgo4xt9,k w6i 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 ("+" t ufv4w) z0r .n.xfij8xqrq 4c4o "-" to "+" to "-"), and place t8w)fvrucq nif 04j4x .qx4.zr hem 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 serinnd lp7nbv66et*9t 8 fi tt*t9es ("+" to "-" to "-" to "+"), and place them in a circufb8* ntnttp*t67inv6d t9 e9lit, 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 inx6cm:0q rqzx/u *h8xy parallel, and place themx086* r:xcq hxz yqmu/ in a 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 are conjggwn5 wr qu,w4i73 qw-3vg:r fib4+nnected 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 connectedwt rallms6.j* s;36aw in series, the equivalent capacitance of the combination increas.6ml r6sjaw wla 3*t;ses.

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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 bpomttaii4)h az ), a:7attery. If a total charge of Q flows from the battery, how much charge does eachaih,t47 za:o )t)iapm 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 conn3ybrkgpyrb k:8* tl)kw:+d )1w y3mk lected 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 equi5ulq3m 6 .lanxvalent capacitance of the combination increases.x mq .53llnu6a

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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 parallf: gwfy:)ips (el to a battery. If a total charge of Q flows from the battery, how much charge does each capacitor f wfp:g )i(:sycarry?

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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 a- jepbxv )(4kyio;l,x 4i .withe quantity 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 serper2e;h)wyf 6*tfxp (5m r )je6: lngjies to an ideal battery of constant terminal voltage. At the moment contact is mad5 p:;r xe6jhft)r2*6e(gfly)p jem nwe 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 ar4ltzad* bw *x7ij-s1qe connected in series to an ideal battery of constant terminal voltage. At the mom- 1zswliaqb*j x*7dt4ent 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 tkkob 4n7;9,wztvx;jbo) p3qu o an ideal battery of constant terminal voltage. When this system reaches its steady-state, the ;7 qtx;ob vpj3unko,9b4zkw )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 shouldx 66xw/av*ucr

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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 addition5psxphhkg2 1sk ;jz6 2(2hk,ydon 0g n 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 ammeter in a circuit consivv-9y )otr:c-wjs* uz sting of one resistor and osv 9rwvjz:)-ct -*uoyne 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 an ammeter's shunt resistpcukm8n v -l6xev8k269cjed 5ance

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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 galvanom+ jumh8too//l e,rtw 0eter, 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 voltmxztv 92 vb (gkmc;,)yseter'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 vo 1q:kh3i)*cs ku1m/ yjz rs5pzltmeter across a resistor. What happensck5: y1ui* 3p z)sqkjrsmh/1z to the 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 is wired in serie+3-q )/c/e4bsq*uj4br uro hf)j fptps with an ammeter, and a voltmeter is placed in parallel across both the resistor and the ammeter. This network is then placed across a battery. If one computes the value of the resistance by dividing the voltmeter ret sqjeqjffcbrb 44ru*)/h+oupp/)3-ading 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 s :3a:u(e5+bym/bx a0,xg,zg:d veoh-nm iilneries 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 reading by the ammeter r gg +e:( il,axm :v:5a0mx dnuh/zbo-y 3,enbieading, 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 f9*7p4 :ivck gvayh 0r4.0 $\Omega$ 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 1pv2zts1.y*p +v* rder2, 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 12,1avp l rn2sz14 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 czv*(rhz2l3y)r qzx +fks 1jc8 ombination 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 5ef/e8stjm0 sn:c1 a la 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 ag7kah t/ 7e/af 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 of a 61ki7o8 e jxbs4.0 $\Omega$, 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 parallel co2d -r6(ekegi qmbination 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 applianuzit/) f -b;a281kyo:o duhknces 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 what total ci1bazo:;/n uft y-2uk d o)k8hurrent 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 numbery1x tk)x+u/zo of 100-W light bulbs you can connect in parallel in a 120-V circuit without tripping a 20-kxx /o1y )tu+zA 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 /l/l4/ay,lj5 svnc ;(qserhr $\Omega$ 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 30 n4ir6t/ond.n f r/0k u$\Omega$ 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/es(t pg v3:re, 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 ah.:g iafu: m,jd8h yt:v91amxnd 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 aov(3fsz o(c- wnd 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 9.0 z,iagaf 7.-i* jmbu3x $\Omega$ 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 resistanm spt *b 1k.gz9ipfh)h4y:pl )ce 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 throug h+)pcqp(f01f e vm7dph $R_2$, 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 resg3,c wcp:g *iq, fnug.istance of 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-,/goc /ty.qteg eg/2zly )fl5 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 6l4pyex v 8 svhycn*n3hfzq ;ex:x /,4the 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 89du b-mf mfb30kflj; 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 relat9s fk0hwr)d:nb6(mhu amwci 9(c( 0 gzive 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 poin;3pgwstc0fn o1z,cf v)6x:e ht 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-wc uc,p;qc0)5)m qiw k5?


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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 y z+:z jf 2w-q8+c yb7i3:czu4ee9monj 4shhw 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 from point A to point B in hd q:idvnz9*zc7,s3y)z z f5x 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 currentc8.fxfs.ty:sw3s pb2 6 :tnctl5e .xd in 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 ir+a2jlgvyeb2, ec g6cg s9*)zn 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 ifh:d*u hror l o; :lf,(,vis:vn 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 t aj tufdb2i5g8 *sh k+*dj2dz1he 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 ity)je38hu86z t lavp4 n the 18 $\Omega$ resistor in Fig. 19-7?


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84#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What current flows in the solid wire connecting the upper left and lowerr gq eseg1i-(6 left cor6e grqe1-sg(iners?

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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 connected1akgyhe6+2o v in series. The equivalent capacitance of thg eva2+6k1 oyhis combination is

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86#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  5.00 mF, 10.0 mF, and 50.0 mF za+7yco:h *c6yyn6 uc5 *suvz capacitors are connected in series across a 12.0-V battery. How much charge is stored in the 5.00-mF capacitorzzvc6ou 6+ syancu :c yh*75y*?

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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 50cr40 kulcl3 1(id(ae a.0 mF capacitors are connected in series across a 12.0-V battery. What is the potential difference across the 10.0-mF capacito 1e(cr4au(al cd0 lki3r?

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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 connectedfo7z-yfn f- (v db,yv5 in series across a 3.0-V battery. What is the vol(fo-d zfvn bfy 5v7-y,tage 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 battery. ,x ia:c,p.qyp What iyqp,cpx i:a.,s the 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 3zc6p,mw10 fkd .0 mF capacitors are connected in parallel across a 24-V battery. How much energy is stored in this combina,fw0pc 1k m6zdtion 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 auuh,q w qw q hv)l0eg3f)89+khre connected in parallel, and this pair is then connected in series with a 30-mF capacitor. W9qlu )huq)wgq+kfhw h,e3v 80hat 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 f:pi;56 nfivx and 8.00 mF are connected in parallel. The combination is then connected in series with a 12.0-V battery and a6 ;nivff5xi :p 14.0-mF capacitor. What is the equivalent capacitance?

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93#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two capacitors of 6.00 mF and 8sk )- 3;-fp;xat riwio.00 mF are connected in parallel. The combination is t;ks)xi-p;ri ft3oa w- hen 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. The combietm5-zm;akey i8 gdf;q57 m/mnation is then connected in series with a 12.0-V battery and a 14.0-mF capacitor. What is the voltage across the;mtqy5mfe zg8 / -mdema;ki5 7 6.00-mF capacitor?

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95#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 2.0-mF capacitor is charged through,(m jpe f v+,kvlyw-c8 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 thr66i vr34hxi4qwpl 7 nkj06mkw ough 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 ey)dug7psv.;4+sb 9 khc +rgucapacitor. The capacitor is initially uncharged. The RC combination is charged by a 9.0-V battery. What is the change in voltage9ku+b h dvgu.g)s 47esrcy+ ;p 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 ser5+(t;-dj2c:4yh mzok s yjuoaies with a 3.0zt:jk2ca+d hy-;u jmoo(s54y $M\Omega$ 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 internbz+gzf-ln t ;(al 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 24n5lm-i tmeb3t;1f. uz)a 1d-rqbowa8 .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 /2yhro e,a( g tp0c0 w,pxx,lhof 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 resistancz7l,1sywqz,uh*3hfzkt7 0 jz e 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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