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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 ak4trx 8(phk ju*v+g.o battery, when no current flows to an external circuit, is referred to as the +gku.hktox 8*jvp4r(

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2#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The potential difference betwebjfgq2dm9 64nx38o 3w wtto-len the terminals of a battery, when current flows to an external circuit, is referred to as638g3 -b2l 4dofqm9wo ttnxwj 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 r k*aqvz7e7:d8kq 3 4.yx .l -l dbmx3g(pklviin 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 coir9iiwkni 2m.o6:tf, vd 9m-mnnected 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 au kr*f4j9j9k are connected in series to a battery. If the current of 12 A flows from the battery, how much current flows through any o 49ujark9kf*jne of the resistors?

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6#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Three identical resistors are connected in ser5iysgbt/l-*hq w6(u *bh9 dkdies to a 12-V battery. What is the voltage across an/gb9*ys dh(l ik qhb5*6 u-wtdy 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 seriev* jx9oim0, q u2irr6xs to a constant voltage source, the power supplied by ther x9 0u6xiivo2q *mr,j 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 cg5-oc1qo*2df fip3,x1kpccn onnected 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 in paraa4fib rrb)4r +llel, 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 cotdcyqn9 j7pyuk5 j5 ((nnected in parallel to a 12-V battery. What is the voltage of any one of the resic9dy7jn 5kq tjy u(5p(stors?

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12#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Three identical resist gfaphr :ela w*.-xj2(ors are connected in parallel to a battery. If the current of 12 A flows from the battery, how much current flows through any one ofrhj (xwga. 2-l:* epfa the resistors?

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13#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The lamps in a string of Christmas tree lights are connected in parallell7j+y2i tl0n.k zdk8f. What happens if one lamp burns out? (Assume negli0l2j kzniyf7. k8d+t lgible 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 souryxq:h -w l6sll*s41okce, the power supplied* l61swhq- y:klo4sxl 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 identro9j mii 6m(6w,v8rxsical resistors, each of resistance R. The maximum power each can dissipate is P. Two of the resistors are connected in series, and a third 9mivxwm(6 r ,j8r6oi sis 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 ruld d5cpk)r+k /ye.
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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 ru3qk0 agi 3o3on;5m te7o m,y mxdp;f,gle.
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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 if 1gwl,wg)8oza 2p x1ks 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 an 9 exbjx iy96w;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 valid for the circuit k(us5j(pq3s:6 dj7 6di ymgj(st 0vx lshown?


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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 bap2;dyp;3rtjy-.q c , /fpi l 1islpn/ntteries together in series ("+" to "-" to "+" to "-"), and p ,.1l;c -rp /y3qnl2nsdiipjy/pt ;fplace 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 stoe7k;*, tlqxu15bg wq brage batteries together in series ("+" to "-" to "-" to "+"), and place them in a luqbgb t7ex ;w*,q 15kcircuit, 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 identicbpu3w 8u,0wm0n r lxr/al storage batteries together in parallel, and place them in a circ 3rb rwu/nl0wxu, 08pmuit, 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 connected in series to a bati*c5 kzz(slx-7 me:uatery,

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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 conne4v cxd,l gj).icted in series, the equivalent capacitance of the combination incrg)x d 4ijvl,c.eases.

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26#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Three identical capacitors are connected in series to a battery. If rxn v2htm2q :t/u2; kzcf+2 cla total charge of Q flowsc+h; 2mqcutnz2x /f: 2rv l2kt from 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 capacito.uk2 po8uea 8brs are connected 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 iebwb*ti y(,h +n parallel, the equivalent capacitance of the coihw, t( yb+be*mbination increases.

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29#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Three identical capacitor:lwklgttum fqj90 mopp34 b3 r2m60c4s are connected in parallel to a battery. If a total charge of Q flows from the battery, hm t0c0 gb4p m:uo3pqflwmtl3 694j2rkow 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 th 8sbtf 2+obel6qy1z 6ke 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 series toz4j dcfqv91+lwi 4k 4w an ideal battery of constant terminal voltage. At the moment contact is made with the battery, the voltag1jw q44w94 kdz+fi vlce 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 congf+8o3 ) -i yt mybigaw)j/r(rnected in series to an ideal battery of constant terminal voltage. At the moment contact is made wi)yyri/rfgbi3- 8 o+m) g(taw jth 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 se ;76rf 2ln) emwr4 kz9*iffc1sgx 0owqries to an ideal battery of constant terminal voltage. When this system reaches its steady-state, the vo w rkf*o;f14wxmlsf en)7 2r0i qg9cz6ltage 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 shouo 7,smjk,b.6mv oe-;2uwvjna ld

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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 convertzt p 1hzmwn360ed 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 obfn5m6z*v-o(rz (kpsq; xd4 cftained by properly placing an ammeter in a circuit consisting of one resisto6m4 5o-fkdq*nx((z cvfr ;sp zr 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 aod1p81xw,gei e lrw .61ygf3 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 construct a voltmeter from aq xx cz)yl6ycs*3vza59on(9w 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 volti,zfwfl* wse0 ;zv4u* xz+v zx3p0mi *meter'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 across a resistor.y3kbgqo(cmecn 544. q What happens to oye3q4(.5c gqc4 kbmnthe 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 series with an ammeter, c4av 3bv0h: ovand 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 resist :bohvc0a4v3 vance 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 seriexedh9b*w-vo; s with an ammeter, and a voltmeter is placed in parallel across the resistor only. This networkdb*e9 x ;vho-w is then connected to 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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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+z5xgjj,2lj g,pc*nh 4.0 $\Omega$ are connected in series. A 12-V battery is connected to the combination. What is the current through the battery?

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45#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Three resistors of 12, 12, b;-j ih7-+o)ccb ekxjand 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, rp,4b9fld ka/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 combination fqte2be*a9fdjrw e44. f:(y oof 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 *f(jbfxy1ia-1j l gk/h a f3q*a series combination of a 3.0 $\Omega$ and a 4.0 $\Omega$ resistor. What is the voltage drop across the 3.0 $\Omega$ resistor?

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49#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 22-A current flowse - wvr3-lcv( v)sl5rp into 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 intof,c wjqlgk(*b 1 6cz1v a parallel 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 parallel cng89tn9(wxkx+/ w r;k 43 nhzkkrref .ombination 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 120-V circuit: 1200-W toast.3xow dk x:vvp7r4s8e er, 650-W coffee pot, and 600-W microwave. If all were operat4 x7vsw e3drvk8p :.xoed at the same time what total current would they draw?

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54#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the maximum number of 100-W light bulbs you can connect coe+48-y gy;uh2dl xr:itz( rin parallel in a 120-V circ+ 2ueyxho yl8c;rd-t z4: ig(ruit 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 2.0syck q)q7o32.p1 fmre $\Omega$ 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 v0x(. jlk)xk)uce um: 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, a5od) 1j(reg1f 3khecqnd 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 9jq;.x3gd 1xcqrqnx 2and 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/*s l-kki(csug szr6/ cew8l 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 an5jiw e9wl )w4h r0zjl);2 a5tgryvl.md 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 circtcbg6nf c l0k2p;ki,( uit 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 .(tvv; khddq7h $R_2$, 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 inpi3j j3(aoafcw bw)32 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 currea4tg pv4w c ua(f(4(4 c7okgjent 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. o-jpbb g3wm40+ocr4l4 .zvne 19-4, 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, dlj.uon8pg8 9ys /6nvozeye/g 7q5jc 0etermine the current in the 4 $\Omega$ resistor.


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74#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the potential of pointg;h,qp .yt du96tv 5nt 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 point C in ej5tqx2 jefsh;2,6u0k8 jvdno* gia3Fig. 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 v2hzxdzo7njc a h2a7 a56b(mirx* 3j (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 frk(sc(o3f, 2 m obh1gbfom 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 from po*i 6zwj.0,h(xc i t y/)viydulint 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 the h19fwbywo u xpfuq-1h846k n;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 ir8oaeq *q mc18n 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 the 4,l6h(deqy .e e $\Omega$ 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 thr j ie ))h6kezj;r(v,le 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 in7 tw5b)v;axvrt dt u-6jhx5-b 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 ai-pb 0z qidb0of)dlh:/;a6 (gkb,qn nnd lower left corz,k i nlpdni)bh0b6q qb/-do :(0ag;fners?

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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 capacitancstu .*tjbn 4:os( tm2/gj 5krce of this combina: j./c5kn *m( otsbujtrgst42 tion 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 capacitors avwhq:jmg +;a-h gb4k: re connected in series across a 12.0-V battery. How much charge is stored ingam -q b w;hv4::kjgh+ 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 acrzc 9 ;iwq 9-7 z*ihahua/o9uwnoss a 12.0-Vhhui9w* ;7ui-zn wq/a c za9o9 battery. 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 capacitor are connected in series3v a;xcsx e6z3 across a 3.0-V battery. What is thzcsxa 63v;e3xe 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 seriesup c 88xh2(3vx0fyc jq across a 3.0-V battery. Whax3jp (0hcqcfy2 x u8v8t is 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 3.0 mF capacito,bur 4ss l.shtx4s jc a,1k;/ors are connected in parallel across a 24-V battery. How much ejb,4sr ak, oxss1t4c; /ls uh.nergy 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 connected in parallel, and th.p0 .abdqn-kmis pair is then connected in series with a 30-mF capacitor. What is the equivalent capacitance of this aq .0.d-b kmpnarrangement?

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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 mF are connectede:.n9v zu 7cad in parallel. The combination is then connected in series witna9 :7.uevz cdh a 12.0-V battery and a 14.0-mF capacitor. What is the equivalent capacitance?

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93#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two capacitors of 6.00 mF and 8.00 mF are connectef,.u3n6ax3hzz p+ ctmy h3(/ gjgu4xdd in parallel. The combination is then connected in series with a 12.0-V battery and a 14.0-mF capacitor. What is j3nfx.3 ,ya6z(/ htcgx4 umhz+gpdu3 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 conne 5luu2so9 3oiut09fc0no w ip77djf:fcted in parallel. The combination is 7uodo9fs0 jc :2i0fli 7ntufuwo593p then connected in series with a 12.0-V battery and a 14.0-mF capacitor. What is the voltage across the 6.00-mF capacitor?

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95#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 2.0-mF capacitor is charged through a 50 h8a-+nn pd;x f$k\Omega$ 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 th zvl/glbv5t3, 9c.) it/rcivw.cdip 0en 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 coxje*8g n,odj. 4odgtk1 4oqi 9nnected in series with a 0.50-mF capacitor. The capacitor is initially uncha4i.dk *8ojqdj oxg etog9 4n1,rged. The RC combination is charged 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 connected in series with a b)oz tgwphtsl; z2*0i oks615 30z2hg s ot6lo)5 sbtk1* pwz;i.0 $M\Omega$ resistor and connected to a 12-V battery. How long after being connected to the battery will the voltage across the capacitor be 9.0 V?

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99#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A galvanometer has an0 3h4--7wk zkl)k u7q.dktpwtmk h1vd internal 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 + vqp s8 rbwihrc2m2cm6*y4/ma 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 resir;u)m76uvz q cstance 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 co c 1j97qmibnpmup:*k 2il resistance of 40.0 $\Omega$ deflects full scale for a current of 2.0 mA. What series resistance should be used with this galvanometer in order to construct a voltmeter that deflects full scale for 50 V?

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