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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 8t t/z5*cjny ra battery, when no current flo 8/ctrj zny5*tws to an external 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 flowscldetwk8eu , 0p.6g :o to an external circuit, is referred to as thdl.6c:0 o,ge uwe t8pke

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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 sebwmcjng r6jf: ho.zge /*2.t2ries 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 connect/9m0i r yjsgio/eo5l5ed 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 series to a ba1 ry7drs,a k;attery. If the current of 12 A flows from the battery, how much current flows through dys7rk1,raa ; 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 connw 8bu;-/uz ztechyq2 ;mw;pd 7ected in series to a 12-V battery. What is the voltat;d-7ewz /p muw; bqzh2uyc8; ge across any one of the resistors?

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7#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  You obtain a 100 $\Omega$ light bulb and a 50 $\Omega$ light bulb. Instead of connecting them in the normal way, you devise a circuit that places them in series across normal household voltage. Which statement is correct?

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8#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  As more resistors are adde.s7 qgbq2:t9fv-g stnd in series to a constant voltage source, the power supplied by the sn.q ft:svbg72-stq9g ource

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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 connebs(z,m)ful 5s s5 vyl:cted 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 parallel, zt0m(r*jv 4 k+i4 f)oufcj( ajbaj-h 1we 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 a 12-V battery. o*xfj:jjq. :cpef u,dw ;6vd, What is the voltagef;d6,j jo vpwc:f xdq*. u,:je of 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 are connected in par-oqv7sh (-a/pn*uow yallel to a battery. If the current ofq o-(/7v o*shwy p-anu 12 A flows from 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 Christmas tree lights are connected in pak00 b86b n)gbux cd w.4xqyf8arallel. What happens if one lamp burxb gnk w4y)abfd8. x qb0cu608ns out? (Assume 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 constant voltage soi ffn5js n5+q1urce, the power suppfj 15s nq5n+filied 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 ak k.5-z l8r;/v0gfiy;acmn-y2ilxe of resistance R. The maximum power each can dissipate is P. Two of the resistors are connected in series, and a third is connected in parallel with these two. What is the maximum power this network ckclva5;;- 0l.r zyxm 2- i/ekfy8 ignaan 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 rule.x rujuej h3ru8u+026q
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17#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
State Kirchhoff's looulp; 98y atq5pp rule.
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18#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Kirchhoff's loop rule fj r;l k, e*ku/h)csr7)-e9-qoly uhvcy.z( uis 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 example oy6cz 7k-rcngqx((w:q bv6 y)r f

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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 circusuwn,wk)t (-./s,zbl i j2da lit shown?


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21#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  If you connect two identical storage batteries together in series ("+" to /jn rbj:7x45qf0g /5mylfjnmy o5;y7m cx jf6"-" to "+" to "-"), and:o40m jjy5/cb/ynyjx56 rf7jxnf57 q;gmm f l place them in a circuit, the combination will provide

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22#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  If you connect two identical6 *fzp4pbr7qbl91w +ea-efue storage batteries together in series ("+" to "-" to "-" to "+"), and place them in a circuit, rz*e96wa-uqb7fbf ep+e1 4lp 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 /z+v/ ymd 3bvkstorage batteries together in parallel, and place them in a circuit, the comzbv3k// +mvd ybination 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 s +- y2ktdcnz2series 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 ardexnp)xs ;;1tm+ rc p 0q(7vj/zq3syq e connected in series, the equivalent capacitance of the comb qp s1xpc;+v3n)yq0/xt zsr ;q7(e jdmination 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 connected in series to a battery. Ifb so1(h5t4 sbe a total charge of Q flows from the battery,s4b(ehtb5o 1 s how much charge does each capacitor carry?

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27#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  When two or more capacitors are connected in paraw 2xkm *0v tt,mwr0mp0d;rst w0: ntu+llel 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 h9 m3flqgh,3f connected in parallel, the equivalent capacitance of the combination increasef3hg fhq 9l,m3s.

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29#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Three identical capacitors arese 5cpgv k kfwgm(7aeuj154n,t8x(k l9tk 34g connected in parallel to a battery. If a total charge o ek(4kxpvtgw7eu5g 18t5kc(mjs9ln4fk a,g 3f Q flows from 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 qua wqrub5x2 ror4i:z 3w/ntity 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 battery of const 6sbymij 6b/1gzxwokni (x28j9d:he 6 ant terminal voltage. At the moment contact is made with the battery, tzxi68 ni:e69s whmg6 dj1x(j2bkyb /ohe 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 con3 :xw xl:koxa5i;e-x-+u sfd)e2facynected in series to an ideal battery of constant terminal voltage. At th k wfxx5;-do 2sa+exl 3:i-: f)cxeuyae 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 id/f f-ea5vx sc*eal battery of constant terminal voltage. Whene5 s/afv*-x fc 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 should oj1i;y;le 1of

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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 ammet-gegi: 8,5ses .mw 9gr.dkw hrer 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 placing an ammeta *mefn1*sylu12ko, q er in a circuit consisting of one resistor and one battery. A* 1sulme2ynq *okf a,1s 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 /p/: uq;g hkniof 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 4/(jzdr,en el 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 oxbdyu;.-3z p wf a voltmeter'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 acrossw- ,3c1j:kxnivqqki 7 a resistor. What happens to the total current flowing in the circuit as a j,n3k:q1v ki7x-q cwi 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 ins5otdmi 4qsc+ p8 gb;xv2)elaz6nj(h6 t dn,6 series with an ammeter, and a voltmeter is placed in parallel across both the resistor and the ammeter. h5(bm a 6nnqe 64o8lxjpsst;dg 6d c2 ,ziv+)t This network is then placed across a battery. If one computes the value of the resistance by dividing the voltmeter reading by the ammeter reading, the value obtained

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42#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An unknown resistor is wired in series with an ammeter, and a voltmeter is pla5pm6mtr6. keoihgj1()4 x zklced in parallel across the resistor only. This network is jkmm.kt14ie) 5(zrg66x lhpo 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, tz97 obse aeh2b/8 m9b5.0, and 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, 7omjr-ron2qv/g ,un,tk ( . irto/a+eand 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, 10 sx0z kzz4a2q.ba9sz 2, 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 61qkw55vxgzyk.m (shof 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 combvcw mf5l1 or g+i/f9y/ination 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 combnq pg1k )b6u7s4h8ho8l q-mtuination 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 cos(ep0 p3a fmqzcy.,j/mbination 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 intmvmw*kv * i2uw yr5sip08es8zqd 8,*ao a parallel combination 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 toaster,di,c6u. e u1 +5aayvc .mz;(mtq1wd as 650-W coffee pot, and 600-W microwave. If alld(i.dvs qma, 5 1ec6a1cum+a .zuytw ; 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 connecgdw,2uk 9 olu 64c6)gpdv ,sr/e -i(cgfqex)lt in parallel in a 120-V circuit without tripping a 20-A circuit breakerw9x og q(vlkude2,desgpr fu ic/gc4) )6l-,6?

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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 1 tcla w-wt9p3$\Omega$ 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 p ml zd0/gn bd.8wdkzyd v,5,z .0uus)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,ahe(u9*c,lfp : t.o uo 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 and 9.:*asu,dq w/ wq0 $\Omega$ 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 9geb2 7yst q7nl03lcg,.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 9n:(;igj bcupsmhc )4 4q)s 3lw.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 resista yvcx0l44g 6nc/)nwa*4 ywrednce 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 through itgxs yi6h( q))9,pvf$R_2$, 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 rexcn8 qhph4q8yc 9fu7+ sistance 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. 19-4, k)r2 tjb 8z0 zfz(tk:xyp2y +cdetermine 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 tneo / r kutr5x .a4+pcm7(gmv2he 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 the 4 4awbhb;le;s1 $\Omega$ 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 d kv 2fffdk3:5h9my v1x m6bi)of point 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 Fig.r;md 5shk65c pa:5lsc 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 inx1.8 y;a-mhm8 vhcjyz r8p -za 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 thrfr) -ui:e/)zr :l w6s. jbxk)tal c0oe 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 pointzxh4/o9z+i2) czsk q f 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 pwj4/pslr:(s1 ik4hn 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 in t sn5aaao 9,q+j;tep )p 2w/ara.0 tqxfhe 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 innkb:rk8(f lhh)4c,;wi b kt n1 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 ixt ab lj4,ysha3 ;g+pwpc- ;(mn 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 lb+v+6 rwzy )h18 $\Omega$ 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 lower lef ; z1sdnky xd:g 5amh6s(rh9n.t cor:ns r9( h;.mgny5d6xs zh1dak ners?

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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 seg 8 hdaey-a3aj; *az3wries. The equivalent capacitance of this combination g8ahej-z; ad*aay3w3is

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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 arcqichzyy;mkn, 9m u5bnf(, b.k a*95ce connected in series across a 12.0-V battery. How much charge is scn,q zbyn h,5m kb*c9(9cyk .u 5af;imtored 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 capacitors are connected in series across a 12 hwu 9j8ed.ln ay66ak3 c;wih-.0-V battery. What is the potential elduw3hak-ancw6i6.98h; y jdifference 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 series across a 3.0-V battery t6/h4m ugfv1hln-7pu. j-sob. What is the voltage across the f pbhu-v tog67-uh14ns /.mjl1.0-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; 4gmcs-g pqe;.0-V battery. What is the voltage across the 2.0-mm-eg s ;cq;4gpF 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 capacitoradjp9(5(y+l t9u prl: nnk0ny s are connected in parallel across a 24-V battery. How much energy is stored in this combination when the capacitors are fully charged? n pd9n lrl0 ptk+uy9(5ny(j:a

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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 thi 5z5 u md5jc57atsvvg:5w4t eoh1cf: js pair is then connected in series with a 30-mF capacitor. What is the equivalentw5vj 1v5c t4fo5zhm5 gc:st7j :u dae5 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 5orn+vt/ h 2vfin parallel. The combination is then connected in series with a 12.0-V battery and a 14.0-mF c/t vh rfno+2v5apacitor. 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 6.00j *pq(b 1pmns- mF and 8.00 mF are connected in parallel. The combination is then connected 1-(qmp bns*pj 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 par ;zxjjf2q ba cigx n1+2115igballel. The combination is then connected in series with a 12.0-V battery and a 14.0-mF capacitor. Whatfn xc2 1gbji5;1+jzg1 2ibaqx 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 cm/g5 z qyn97gzharged 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 1 ik er)qpz4) 7sh0p2gl2 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 f l2 r2sbfkf1,s-rm 8pa 0.50-mF capacitor. The capacitor is initially uncharged. The RC combination is charged by a 9.0-V battery. What is the change in voltage 2f2fs r ms-klr 8bpf,1between 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 conne/y+jv t37* gzy5x0uficn dzs3cted in series with a 3.05sjy7duty +i *zc0xn3/ z3gfv $M\Omega$ 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 k n9;q1 b0yx/bai)wta100 $\Omega$ 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,e,0y+h imhs x with a 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 res bhxf*0q-s3s uistance 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 cof)83engkpj h* il 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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