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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 0rcdk;rdh:8h a4f; jn between the terminals of a battery, when no current flows to an external circuit, is referred to d a;c; 0fr4:nd8jk hhras 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 us)p nhxde)at3h*6,znx. n2 rflows to an external circuit, is referred to nne3th rx,2x)*s)pn.6 a hzud 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 connecteucr; 2gpzfdh57 6g)f wd in series to a battery

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4#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  When resistors are connected i*n4qnu o:)cpsx k7;a jn series,

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5#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Three identical resist9hjjxz(r o4u);y+w tis1 w-gftjh(h:ors are connected in series to a battery. If the current of 12 A flows from the battery, how much current(4jtjh w wohg tyf-1 xj+s(r9hzi: u); 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 battery.phhgfl,7 vtg53 i ,qr4bvjyj2q0s2 (x What is the voltage across any one ofh2 v0fvhi 3lg5(xbq s7g4t2yjj,qrp, 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 series to a c pbs x-vh qk9ug+ 4:w3hp7uh;/vri-q donstant voltage source, the power supplied by tdh:s k3/r h9q-giq;p +7vv pwhxu-4bu he source

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9#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  When two or more resistors are hu 7.hn jmuom/)60rvo 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 connected in parallel, we can be cz/trj+ /vyx d,ertain 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 .m,hht6a4i jsk7s9w g in parallel to a 12-V battery. What is the voltage of any 7 ,gs4t96h. ismh kjawone 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 paralt;es 8bunch/36w qb axu(g6l.lel to a battery. If the current of 12 A flows from the battery, how much current flowsuu clxngwa.6b/q (teh sb368; 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 parallel. Wha1*lfocl9u+an v2ntq2 t happens if one lamp burns out? (Assume negligible quln v*f1ton 2cl a9+2resistance 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 c;g3.rr akgu7 ym )-ptdonstant voltage source, the power supplg dp y;gk) r3m.ra7tu-ied by the source

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15#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Consider three identical resistors, each of resistance R. The maximum power ea k 4yxqjlw3x4e/ju ,z.ch can dissipate is P. Two of the r.4kluxj 4qj/yx3w, z eesistors are connected in series, and a third is connected in parallel with these two. What is the maximum power this network can dissipate?

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16#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
State Kirchhoff's junction 13 ayzi.zy;xyd9 0anri+fjf ,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 ruax 0 48sap ;6aauwapv 7sox4k/w0z/pzle.
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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 ecebink n8)piz/;g0 1e xample 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 exa6pju. 0 u6e1fahei/ah mple 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 circud .e3s0x1qvob it 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 identio; xfo iy , (*mf3cy36d.tzhdkcal storage batteries together in series ("+" to "-" to.*k;h33fi (ot,fmz6yddy cox "+" to "-"), and 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 identical storage batteries together in series ("v)/)bkj+fbk l+" to "-" to "-" to "+"), and place them in a circuit, the combijvkl) )/bk fb+nation 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 identicasd*l1 c6 ,kgt6 qhhmg1l storage batteries together in parallel, and place them in a circuk s,g1 6t16dh lqmg*chit, 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 connpgut. scl7owr:6w1 9*s aji:mected 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 i(sej-ga9, uf*4nddprn series, the equivalent capacitance of the combinati -d,n9gue4a rsfdj*(p on 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. If a nqb 3,* ervi*tb j)k6elwe-m 0.c (zwvtotal charge of Q flows from the battery, how mu-qc0e eb (,rl**k 6ijw3nz.btvwv e)mch 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 parallelre f 7ok pb;q729idcp* 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 io179(l) obiu q(qev4w0l1o 8mwl j+ nruawo3wn parallel, the equivalent capacitance of the combinatno0oo1w u wo(+1m9ia8ru)wqll jwb7vq3 4l( e ion 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 batn5astwe1 9mx 8 )zisw.tery. If a total charge of Q flows from the battery, how txnzeswisw85 )a m9.1 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 thea.x; hbuw/: eh;wef :t 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 capaci l -iq b55c-ytie0 /lrm5wb c9zhot*e4tor are connected in series to an ideal battery of constant terminal voltage. At the moment contact is made with the battery, the voltage across the capacitor ll4or hyic5ebt90 5mtiqe5-b-z */c wis

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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 connected in series to an ideal batteryz.9n.ta / ) vuyupdqh3y2r o 6iyo-2tc of constant terminal voltage. At the moment contac-d ohip.t3r o2utq a.9vy2c6y)/ nzuy t 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 capacwte+2hm :t6g4evb4ov dds - 3titor are connected in series to an ideal battery of constant terminal voltage. When this system reaches its steady-stat 6-std4 dv4e3wtgemhbov t2:+ e, 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 shouldc.b5bke y: gt( o.da(t

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35#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A galvanometer can be converted to an ammeter by the addition owg,;z4sio*9+izh n f5q ec)s gf a

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36#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A current reading is obtained by properly placing an ammeter in a circw jp4dqa( vc9d/45nciuit consisting of one resisto54d(jd4 9iq /v npcacwr 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 ammetezr 0qx h; z7j mvf1nb-d (tescl:2t(4br'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 galvanome ;b uf /q.dut3akh/.16i kbfvgter, 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 ruvdvf 70 y)hp9esistance

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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 obtainedetr0u (b+jkj* by placing a voltmeter across a resistor. What happens to the total current f*u 0r kjt+jbe(lowing 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, and a voltmeter is pqflb.wd z2bn 77 kdtcdl5 6*.placed in parallel across both the resistor and the ammeter. This network is then placed across a battery. If one computes the value of the resistance by dividing tdbcq2l7p*l 56nd.7 wfkbz .td he 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)9urj;lvx(oo :oa g1tjny 1k, wired in series with an ammeter, and a voltmeter is placed in parallel across the resistor only. This network is then connected to a battery. If one computes the value of th;lo:rj9x ogku) j1(t,vy ona1 e 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,bvf4s6i /ukmd(jav)4r6j, k a 5.0, 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, and1kxl 9pjd/k*+l) uvlx1 ona)i 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, andd, aeef( ;zn::jxo; dd 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 vhtcn9pf2,(; )wj pw iseries combination of a 3.0 $\Omega$ and a 4.0 $\Omega$ resistor. What is the voltage drop across the 4.0 $\Omega$ resistor?

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48#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 14-A current flows into a series combination of traq;78 /yrnap7v c p)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 combinatdt7 vt,1 j413lmpvh glcc)gk8ion 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 int2lly)4 k d)nty 9ez)vcysp +wryx-.e 3o 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 combina1ns8) 0whwq2 f7sd6:to ikxjc tion 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 th f81ppr /o79efbwi t 0s3xxa/oaster, 650-W coffep /xaix obsw phf30/7rt189fee pot, and 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 parali 4jnpxi ;dp s2)jt,u;8h.im ulel in a 120-V circuit without tripping a 20-A cir xd,pj i 4ut2j)ih;.p8nis;mu cuit 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 2.0d) me+7 q5.rfe c zcr87gni).h/kjan)qi2lyb $\Omega$ 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 av( vxdv+1iq ojcj 2i,*l/j4htnd 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, aftptd. +oewg9 hs k6(h78uib8nd 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 9.46h9wqnb 15gjcwz 9o j0 $\Omega$ 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 9.0 gi6lbk9l6u7 e $\Omega$ 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 5.0g1+ u:(7kpnw -vs;s job7aloa 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 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 theabzqunky:vyu /7-1* o 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 icg: n,-/ dvcj$R_2$, 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 j(s6 h+ ;qbmeuay z()6hbjiz. 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, determine tyc-aje;etnb40rj q3u, ,k wc-he 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 curpeo9wsjh tsz,(yb3 8/ rent 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, determinei 62m81xbbydi9 iek6v 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 relative to pointd cpul7v0*/t-jr)z0 1 c fwepl 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 Ci - u)27a hnnowhxh1y- in Fig. 19-5?


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76#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the potential of point D relative to point C in Fig. 19-5a );lul0pp(wau :l gqr5v a-.z?


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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 )/c 5 ggko9bfrthe battery in Fig. 19-5?


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78#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the potential drop from point A to point B in Fimp)w 10 hvt7zqg. 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 77kvw4 psteimf.4c/r d,9 c bk2 $\Omega$ 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 iz e.1y ld*ra/ixn/2 asn 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 nig72+y mcim 5$\Omega$ 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 the q1.p,bmb8 a;d bcso(v12 $\Omega$ 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 tvcw6pq,p-ur .) fz5mehe 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 ,/4xadb;g n 3kdbo l odg;pf79connecting the upper left and lower left cornersb,lx4pa;o ; 3onbkd /7d9dgfg?

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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 conjq5s uj33l)(y0mp w;hv;emqca4 6 e honected in series. The equivalent capacitance of this combinatisqcq54weo h6jm;v; (jpy03 ua hl) m3eon 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 acr-n l cw5u1 ea4b,,ppazoss a 12.0-V battery. How much charge isna- pcezp ,4w,5 l1uab 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 capacitors are connected in serixtx m3e12l +bqes across a 12.0-V battery. What is the potential difference across the 10.0-mF capacitlmt1 b2+xeq3 xor?

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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 * pmnr3 i pc12ma)(l3fudh/k mm::dqg3.0-V battery. What is the voltage across the 1.0-mF 1d(kmg)duqp*:/nlfm : 3hamc2p3 rmi 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 connectjzaag: 4ox(wkj/o szde( t9y- xlr)/(ed in series across a 3.0-V battery. What is the voltage a(ja )( j:/twgo(azx k-yrdl9o4x zes/cross 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 cap95qh7)gtzhk fdxk sv96bjd zy8 x /4hpt/o*v6acitors are connected in parallel across a 24-V battery. How much energy is stored in this combination when the capacitors ar7bhp x/ 9ohv x8s6)gz6fz *k9vjyth/4qdd5t ke 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 andh77wmy7w br b; 20 mF are connected in parallel, and this pair is then coyb777mwr hb; wnnected 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 parallel. Thel/yxl5g tu6dye vt6ng25 -ml 2 combination is then connected in series with a 12.0-V battery and a 14.0-mF 2me5l2ut6ggy/y6 xdnl5t vl -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 c(m-g6g+t:utx f z6jd wx0wa ;fzx0a0 aombination is then connected in series with a 12.0-V battery and a6x;xa g6w a 0u0zgwt+(j-df0x z:tmfa 14.0-mF capacitor. What is the charge on the 6.00-mF capacitor?

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94#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two capacitors of 6.00 mF and 8.00 mF are connected in parallel. The combin2m1 izup+yzp7qsz) ur4j4ojqa 5 ;p-gation is then connected in series with a 12.0-V battery and a 14.0-mF capacitor. What is the voltage across q-grpi2 up )azoj1;up475jy 4 z+qmzs 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 crepc*mq1 9e / lzaub8j;mw91zharged 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 throug: fqo2czr9w8zu o8(f rv 4)jcwh 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 , 1h k/7y bmytf7oc1fvin series with a 0.50-mF capacitor. The capacitor is initially uncharged. The RC combination is chahff1v/ , koty17bmc7yrged 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 connecu4f0c 5z)itr zted in series with a 3.u) ifz5czr40t0 $M\Omega$ 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 10si(vnznza b+pv mk kx)-(7()b0 $\Omega$ 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 24vv)1fav(9pq.p kw xz1pnj2 2m.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 inted szqlr(1leb*v ot6q 2o v),/qrnal 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 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 coi g 2zirrx:9 /uzgfm2o8l 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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