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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 termiq wlk; j5q3y/ azysd,cc1av/* n2 kp4qnals of a battery, when no current flows to an ext*4p5//s cka3;way dqzykj12 vqcl, nq ernal 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 of a battery, when current flows c08o(wjvbil 81qs ibr-opk3 7to an external circuit, is referred t0rwo8kbp 1cb 8 isq-j7i(v3olo 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 se+uo siime;;3 g6o*vhz ries 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 connecte )*mdpp 4clo*ed 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 seri(zgkxl k+:f ;wes to a battery. If the current of 12 A flows from the batte:+ lfzwg;kk (xry, how much current flows through any one of the resistors?

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6#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Three identical resisto+d5gka 7n-6 cnipq ;isrs are connected in series to a 12-V battery. What is the voltage acd65+ in7 c nki-s;qgpaross 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 arhk9it+y)g x:3(xrask e added in series to a constant voltage source, the power supplied h xg+ir)x3 sk:ytak (9by the source

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9#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  When two or more resistors are8kyi+ u(ks441a mighp connected 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 connecte lnzmv(y: v*s)d 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 lkt 5)f e6sqnd7*oo7g are connected in parallel to a 12-V battery. What is the voltage of any one of the l57eos7)6q g ftndk*oresistors?

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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 batte5-a:ry s2 jsu,l ibvburs9 2q/ry. If the current of 12 A flows from the battery, how much current flows through any one of the resis/bsuu i9: qrbs-sja22r 5y,vltors?

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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 Chrisr v)kl(8 g6good9b jt;tmas tree lights are connected in parallel. What happens if one lamp burns out? (Assume negligible resis)bdo o(8 r6k;vtg9jlgtance 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 constanq 4ifp oue266kt voltage source, the power s6epo 6q2kiu 4fupplied by the source

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15#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Consider three identical resistors, each of resis:dk- rgpij31v tance 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 dissipatedp1grjiv -: 3k?

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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 ruleux/)a1hdmk8r0 f dz f9.
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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 rulexv +0qexmnq+2+dn b:h 6j/btt .
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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 exampe q9y:heit6)rg h:/f c x)yxc5le 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 zb3 xcn) iq146ihsp8wrule 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 equations here is valid for the circuit showwvg) s1by crd: 7(c4zfn?


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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 se ,w7( -mr t8j6jko1/l pyxrcxvries ("+" to "-" to "+" to "-"), and place them in a circuit, the combct-xjyr,(r8 7w6lpkvx /m1 joination will provide

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22#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  If you connect two identical storage batteries together in series wxzi3y cak nni.a *dwc/h,w0c *1l;v- ("+" to "-" to "-" to "+wini,.k 0v; y *w3aa*/wchl-1ndzccx"), and place them in a circuit, the combination will provide

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23#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  If you connect two idepf:sh :sy1vu k;o9zj -ntical storage batteries together in parallel, and place them in a circuit,u kov jfs;h-z9 y:1sp: 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 zxurm4,pf13 p connected in series to a battery,

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25#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  As more and more capacitors are connected in serie4z h t+r20hpod7wd;t ws, the equivalent capacitance of the combinatitdd;htw4 w2 r07+z ophon 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 c8 ri (y:i0xvs;84p yqf,dixssonnected in series to a battery. If a total charge of Q s8sd:;4friy xix sy,p 8i0q(vflows 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 capacitors art9-,rs1l doz n48xjog e 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 in 9 c s)+j(uguukparallel, the equivalent capacitance o(jcu+) uk9 gusf 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 capacitos/0 x uwpgs. j5;v6sz4 *tosevrs are connected in parallel to a battery. If a total charge of Q flows from the battery, how much charge ds 5v *us.p6setjsg 0;x/ozwv4 oes 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 th4l 3lfalhqg- m7(dy9; ztiu-le 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 to an ideal battyc) u tek7 ib9*s,ig8cery of constant terminal voltage. At the moment contact is made with the battery, the7) u8sbgi9kct*ce,y i 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 connecte /bxw* t8ro0sod in series to an ideal battery of constant terminal voltage./*so08two x br At the moment 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 g e6c z;s7x x60 lny5+vwlzy/xsol+r8 series to an ideal battery of constant terminal voltal0/yslyzx n8go6rxe+ z;7vxw56s cl+ge. 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 shon-hp d gv+tv/odg,0c 7e nq73culd

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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 convertdw:3z27bbz- pab i2ll mq6g -sed 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 propqmmx(5onsz-ca:ec (qzo j0: 6oc g:*i erly placing an ammeter in a circuit consisting of one resistor and one battec 6cim: m ( xo(coa*g0jns-q z:5oqe:zry. 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 resistancevv6; ozspg 64sl:8fsp

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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 ;d i:kwzn+ zaa.m u2ep:k4a5 svoltmeter 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 resistance of a voltmeter's series resista++oni1dkw;v r.jx)m vnce

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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 obtaineokb5 oq)g9a8v d by placing a voltmeter across a resistor. What happens to the5kv bg)oaq o89 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 6/ *hn. ,n pmgg7wtqhhan 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 compumq g,nh6hpth./ wg7n*tes the value of the resistance by dividing the voltmeter reading by the ammeter reading, the value obtained

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42#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An unknown resistor is wired in series with an ammeter, and a voltme9(7 ;j)jw(sfiz9qsupmlh -u t 6oow;rter is placed in plo6o 9ihp r mws);9jf(7j-q( ust uwz;arallel 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 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, and4x-r:yh7hu3b+v7 9y zhsr+qlm-g osx 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, and 6y60pzcp j /p5z.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 6.0 21x 1* 4(1hnx1len h3kngup6 eygkhjl$\Omega$ 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 ofx-u5i vp** bwd 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 c dsfy z,vz9bz-v e7;w5ombination 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 flows inth1m6q gf h0 6st4jo.,rg. cnpba: n;kqh8p :aao a parallel combination of 4.0 $\Omega$, 6.0 $\Omega$, and 12 $\Omega$ resistors. What current flows through the 12 $\Omega$ resistor?

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50#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 22-A current flows into a parallel combination of a 4.b/ c8:d ibf 8bmf:)dxe0 $\Omega$, 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 b erer:r0ha aleok --28d:q- ca 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 1 wlee06ea q(;l20-V circuit: 1200-W toaster, 650-W coffee pot, aa 6we(el ;0eqlnd 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 bulbs you can connect in parallel in:p*uesl*.l3h, rla4 u a4noj u a 120-V circuit.usrlu,p4 4*hl3lu j o ae*n:a 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 2.07/yx5ks er.df $\Omega$ 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 rdy4b f 1wfoijnn42mnz5*q 9ms 9,fr/ :jvar-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, u8i 0 x3x8cqtjf5 nse96.0, 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 and,)q:c)zpp5i o .tecp m 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 y 7otzq-dv6c b vmj17)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 91jq d9ideq8;j2od 3j w.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 circuit/l3px 2jk( jzxp4zs7rpe c8d + 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 througr7:j j.aibs -dn gm7p,h $R_2$, 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 in0px l024 wzbsktwug6p*+ s*qn 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, determ iq*bk*vtb-y5 kc0p 6bine 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 the yd bf+d/yxqu/5c 0x8b 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, determztt9bd6r47l1a 3usy fine 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 point A relativ l:wys+c+lnph nn87t 5e 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 Fig. 19-5?/cs-4lryb9a1 qvch.c (7zm bn


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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 y ;4do dy36eourelative 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 from thq psv;ksl,64qtmn+ -sm4tar 5ez4z,de 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 z5rdt2q .pz dph8*ut0 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 tciccs1 bft.yhu:kreg: z,3; ( 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 ik4 aom. gbzgm3.q s q,w9z6vx,n 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 +eq 3y- t5hs8jiljkkek5 t/- kthe 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 th3nw +md3,is-(3 xc8kjptay jz e 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 th3 rehpz/e7;d +e:tumee 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 solp 7,ohm7lo-f4mis u;lid wire connecting the upper left and lower left corli;77 ,uof ms- mlph4oners?

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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 equpjt*c1 +,bhm hivalent capacitance of this combitb hm+ c*1phj,nation 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 are connected in series across781zeogc l*n86oh6h; (samdv v6afed a 12.0-V battery. How much charge is stored in thfen(86mc; 6ohagz1*7ahosevd d v8l6e 5.00-mF capacitor?

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87#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  5.00 mF, 10.0 mF, and 50.0 mF capacitors are connected in series across a 12 6 z 6l,sc)ywdkhl(pi,.0-V battery. What is the potential difference acros,lph,(isw cyz6)dkl 6s 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 + zyji-,cgo: ku6ma t.capacitor are connected in series across a 3.0-V battery. What is the voltage across the 1.0-mF capo,mk ty:ijcu g6+.a-zacitor?

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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 capeyqknwm,n2 8se) r-+h7vh (moacitor are connected in series across a 3.0-V battery. Ww n2 ko,s qy8+-v7r)nh(hemmehat 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.;f 5. bphl (y;o9uzj q+xsn vf.woj*k80 mF capacitors are connected in parallel across a 24-V battery. How much energy is stored in thiqjn;sw8ulf xhv.kj+ oy p;z(o9.bf5*s 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 connecte/u2qu81z vib;hcm)sqh hy-q- d in parallel, and this pair is then m;1 h-quh )i/s q-ycb8vqzuh2 connected 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 mF are connected in pa-* g wdmx6nhd7rallel. The combination is then *6 wg-hddmxn7 connected in series with 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 connected in parallel. The combinaz+n :kia ez/m6tion is then connected in series with a 12.0-V battery and a 14.0-mF+iznzma ek /:6 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 8.00igy5gvhlkoj 4ylz5f5 i(a +(4 mF are connected in parallel. The combination is then connected in series with 4gfyvlga+5 ylii54((zjo h5ka 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 charged78v1lb;jda th 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 to 12 V and then discharged throu-qrs6ogwj-4 /l fud08jvpx- dgh 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 capacitor. The capacg0yu;g )bbh/coo 7; ztt*nut6 itor is initially uncharged. The RC combination is charged by a 9.0-V battery. 0cu;t*g7/bhtgt;oy6b u o)nz 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. nqwsd2 -jq u2 )/m,rsqir(ts8 3t.xm (u si8evIt is then connected in series with a 3xjs (s qvw- s i,et28uqqts/r8r3)i2m ( mdn.u.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 an internal resistq4nyrnyw .hf(. dt3;sance 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 24.0kmy1 qdi,70iccjv )e5 $\Omega$. 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 of 1)umpimq 4h y-600 $\Omega$ and deflects full-scale at 2.00 mA. What size resistor should be added to it to convert it to a millivoltmeter capable of reading up to 400 mV?

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102#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A galvanometer with a coil re-ex2i7iqms) 5qth5ok c+ lekjh:46b msistance 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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