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习题练习:Physics Unit19: DC Circuits



 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 battery, when no current hg8d hxz )nm67flows to an egn 8mhx7 6z)hdxternal 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 termina0y(r/4f cntjmls of a battery, when current flows to an external circuit, is referred to/(t 0 mncjr4fy 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 series tovizs 15,gzwh( 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 connectedrxzuumcq-g4p rs560 v5 b+ -qm 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 connecte ) (/sr.hakdbud in series to a battery. If the current of 12 A r. /a (sub)hdkflows from the battery, 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 resistors are connected in series to a 12-V batterb o 57*85t-0+wgh(cyy kbsy,gzdh zn ey. What is the voltage across any one(+,ncgg7 y0thhbkb oy8 s-5wey*5 zzd 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 dhy-0 ti2:b zenntu34 added in series to a constant voltage source, the power supplied by the udnt:- 0n23i ehy 4bztsource

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9#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  When two or more resistors are connected in parallel to a ba:s658r ognghy-a ,lkmttery,

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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 ineyskc4f3)c6p u: 1su h 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 connecyng0 cn1nc0 :bxn*cx7ted in parallel to a 12-V battery. What is the voltage of any one of the rxn0gc bn nn :1cy0*7cxesistors?

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12#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Three identical resistors are connected in parallel to a battery. :/m 5eimg3xxiIf the current of 12 A flows from the battery, how much currentm3xe5i m:xig/ 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 Christma3irq(sxj; 3j)qx/vo 6i; ulbs5rml4j s tree lights are connected in parallel. What happens if one lamp burns out? (Assu(/xs3ij4q 6 u rlo; 3sjq5mli;vj)rbxme negligible resistance in the wires leading to the lamps.)

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14#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  As more resistors are added in parallel to a constant5 o mkkbri dr5/ x7.wwd9vd)6j voltage source, the power supbwrx5k .ki7 /6dov m5)djd9rwplied 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 resistance R. The910ts zrmx2dx maximum power each can dissipate is P. Two of the resistors are connec2rx 9x1dm0zs tted 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(wdbj x+v 9dnp/hy29w 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 loop *csx 9)yue qx 8 1ndp*riws7(rrule.
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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 z),wkkb6lcz ,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 apyd.;,r9bhlf

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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 cibth2f./w :lfe 7:bgfi rcuit 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 j2t9n/+qtpvptogether in series ("+" to "-" to "+" to "-"), and place them in a circuit, the combination will pro nt+tp2jp/ 9vqvide

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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 to 1y1u3nw0vj 8;jcohmg gether in series ("+" to "-" to "-" to "+"), and place them in a circuit, the combinhj1cy0uw8 n1 ov m;g3jation 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 batterlap9(za 6- j;yzvy dg/1z(o+ at 0heanies together in parallel, and place thvz0e /atp19z+aoyz;n(ah-6 ga ( jlydem 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 u04bi+ n354sscw5z bamt) jazconnected 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 series, the equivalent capaci 6 nf -s+lnqasa/e)/titance of the combination increas-nf en /+a)saq6t /lsies.

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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 a s6.cmm(r/6e o;.y g:elg jxrmtotal charge of Q flows from the battery, how much charge does each capacitor cag .mmrcol. j/sgey:(6; 6x remrry?

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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 capacio1lzbre nb2l n1tk (bv5ak 6m9ci+ j--tors 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 conne* :7 nw*ddqrevcted in parallel, the equivalent capacitance of the combina d7*wqrvn:ed*tion 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 connected in parallel to a battery. If a total cfm- 88puynu o4harge of Q flows from 8un-upmof4 8y the battery, how 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 quantity jc;ss x 0ag/w1RC?

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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/dc: r vo qvg)o2pe(+n ideal battery of constant terminal voltage. At the moment contact is made with the bap q/v ecv r)go(o2nd+:ttery, 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 connjrt8b/ njd ydd0e0+i ug/vs;9 ected in series to an ideal battery of constant terminal voltage. At thnvy0d/sjedjt;br 9i 0d8g/ + ue 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 series to an ideal*wv 7v+c +n9s59mk;rkj.dxtpjff a :l battery of constant terca75n flvk:;ftw+x 9v dk+r9p.s j*mjminal 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 shou 60cay /l gpsz5gd1 cn-fvd9y+uwk k7/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 convert)d 3rn4h3lh3jay ( qouz9zce ;ed to an ammeter by the addition of a

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36#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A current reading is obtained by properly pbo5 gec(03wrc lacing an ammeter in a circuit consisting of0ogwrc( b53ce one resistor and one battery. As a result,

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37#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Decreasing the resistance of an amm8cbpxur-5x:zy+kyv+v12 , lc 5c fttceter'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 a galvanometer, one normally wo0i:e jec.od kxykvi0yn.5xvh h621 1 iuld

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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;nkz 5j*bmdr/a4ttn 3 '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 resist7mv9 bhg8id5 j, :f9o4b v:qt )gkqmepor. What happens to the total current flowing in the circuit as a result gvpbq)8 efibh4::vok m tmq7d9, g5j9of 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 wiren:*ej *l od1vmjn k +;43gczebd in series with an ammeter, and a voltmeter is placed in parallel across both the resistor and the ammeter. This network im zve+l3 njeb* jg;o*d4:cn 1ks 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 amttvdr+c c+e.02oxh *2jmbs8k meter, and a voltmeter is placed in parallel across the resistor only. This network is then connected to a battery. Io *.c+ 2djh+xk8ct vsm0rb2etf 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, 3wkct- owst-inj . :6oand 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, and0lpz -1ix+nnqj2lw /t 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 6.0 it+- tj e8d1fn$\Omega$ 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 combcfs /;;/pfbm v60vxro ination 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 u sk5, jk1,jascombination 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 into a parallel combination or- cyc8pt co.9f 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 b2mrkqyqg1uhn5in ;r+ 6skap;39z e- 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 combination of a c:y9oy( r.4 oadwjd*i)5sbhjye8 4bd4.0 $\Omega$, 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 conne,b f4ivrkk d-6 sh8r1fcted to a 120-V circuit: 1200-W toaster, 650-W coffee pot, and 600-W micr14 khvir68-d,fk sfbrowave. 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 conks7c1ul.xkb 1 by7 an3nect in parallel in a 120-V circuit without tripping a . 7alc3 bu171k kbsynx20-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 2.0q+c o xvj7 e-/zjyi:p. 0pgkx5v lcme2sg2 k., $\Omega$ resistor connected in series with 4.0 $\Omega$ resistor is connected in parallel with a 3.0 $\Omega$ resistor. What is the equivalent resistance?

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56#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two 4.0 $\Omega$ resistors are connected in parallel, and this combination is connected in series with
3.1 W. What is the effective resistance of this combination?

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57#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 2.0 $\Omega$ resistor is in series with a parallel combination of 4.0 $\Omega$, 6.0 $\Omega$, and 12 $\Omega$ resistors. What is the equivalent resistance of this combination?

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58#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two resistors of 15 an.r 4duyv52 r(xca qjs,)8l rkkd 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,y.r h3,b g-kbs 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 5.0cziv 3ez;,pvw8li1t + and 9.0 $\Omega$ are connected in parallel. A 4.0 $\Omega$ resistor is then connected in series with the parallel combination. A 6.0-V battery is then connected to the series-parallel combination. What is the current through the 4.0 $\Omega$ resistor?

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61#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two resistors of 5.0 and z ojess(03 .idk7m.+lo ky:xh9.0 $\Omega$ 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.ui.zht ov3b2.0 $\Omega$ 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 in Fig. roc::8 mjuh r2)dxp, e3p0wdk19-2?


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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 through0 m kalaenrn4z.q/(5v $R_2$, 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 circui heo 7;xkpt,g7suwk 1b66 u6zcgv;ic4t 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. 19-4, determicj..w7uy31q rsj oni3 ne 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 dfyy axe)1b.m m 5t+-jtgc*e7e lb5b1the 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 thj x 2p x5uta/ h;m)nqwoba:+k*e current in the 4 $\Omega$ resistor.


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74#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the potential of point A relative to poin ;.i6f.h v, z)msvwgest 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 *d:sd i puc07apoint 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*6nb) e xsf f6kgq)*6ugk;ah q 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 from thg j;r;vmu2xx)oc(qea,izo(. /e k, p svc61pa e 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 fq z 5 a0gs;2-a w s;2vk2pfcln*+tehcqrom point A to point B in Fig. 19-5?


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79#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Determine the current in the 7 o pzga u4lv) aw6n+/8i$\Omega$ resistor in Fig. 19-6.


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80#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Determine the current in the (n 7tce7*.kd 9xlyrgm 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 currentj ca1mwzw vs*srl59-my 6/r w5 in 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 inf 6 *7htmmpmxe)m78kx the 12 $\Omega$ resistor in Fig. 19-7?


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83#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What current flows in the gsc5 (gw, sep6dav).e 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 sol3 iraf s23xiljo.oy9 g .l1ul3id wire connecting the upper left and lower left corners?i3o f2is. r 9l1gl.ouyx3a3jl

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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 capacitance o;golzj*lxc) ;f this jl)lo; *;xgc zcombination 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 kstw:9m3wib3 kamz .2 connected in series across a 12.0-V battery. How m 3wkk9 s awi2t:z3mb.much charge 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 capacitt44/ho l9 nshrae/)g eors are connected in series across a 12.0-V battery. What is the potential difference across the 10.0-mF capacitor) 9/tgheones4rhl4 a /?

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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 series acro xa 4tvj v0*iy; tm4icwu2zk;78q7gvwss a 3.0-V battery. What is the voltage across the 1.0-mF ca wq82x7t4t4vk; viy7agj*w ;muz 0iv cpacitor?

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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 baf be9; r oep:f0 nf+ny0in3y2ittery. What is the voltage across the 2.0-mF cap f+ienb 2 n3pyfi9yrf:e0;n0o acitor?

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90#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  1.0 mF, 2.0 mF, and 3.0 mF capacitors are connected in paralioabz y*g.qh( ;4uz1p /z5hpr lel across a 24-V battery. How much energy is stored in this combination when the cap4.brhz/p5 h gp*i;(u qo1zya zacitors 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 0 lzjtinh.a i57b6iz)b2.h cb, and this pair is then connected in series with a 30-mF capacitor. What is the equivalent capacitan7tbbnbih l5z.a 0ihi)cj 2 6.zce 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 parallel. T/ht+n nkbf.tyxd 0 w./h4d*z bhe combination is then connected in series with a 12.0-V battery and a 14.0-mF capacitor. What is the efdbnnyz/ x.w/0+.bk h tt h*4dquivalent 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 e0m. dkceh*k9. The combination is then connected in series with a 12.0-V battery and a 14.0-mF capacitor. *m9 e0kdceh.k 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 connectz2 ae6hm/- m8t/ b(k.lmh3n jmn fn5zqed in parallel. The combination is then connected in seriehtm.m nj//(-nzn a le3qk5mzh8bmf62 s 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 chargec. e-ml6 x.jnca4/-xn hmvqp5d 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 charg i (n)qp+od5uhb5a 5vta9w*de ed to 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 connected in series with a 0.50-mF capac1a h m51e;qz;u 4aq0nl/tkl b. cscd0sitor. The capacitor is initially uncharged. The RC combination is charged by a 9.0-V battery. What is the change in voltage betweealn;h.qm;e/za bcd0s5 c4qktu10 1sl n 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 thef8kmot* j2ivtns-q 9aq gz85grxq9 6 1n connected in series with a 3.0iq*8z9v- xtn8 rk69 gm toqaf q52gjs1 $M\Omega$ 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 resistance of 10 9)xj u/ia db7tdgpkn(a;c) k80 $\Omega$ 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 o(e-*olyh: u(/dkk 9frphviwa, qu2 ,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 res y*yls;lnv3jvem0 j) 2a p-e(mistance 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 resista9lm d0/+qw2nsz w3jlince 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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