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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: 游客未登录  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 currentoos fwa/7n qt2. ht:.p flows to an extswn/hqto:oa27 f. p.ternal 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, whenhjx0u4ad6 0: oxc(t,/m bdafg current flows to an external circuit, is referred to as th(6, ajmogxbthad04:d / ufcx0e

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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 connect w4tx6/ei mwr1ed 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 in sr;ii j,1 ,gk/uca-mrseries,

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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 battery. If the cunumc 3szl )p9fyb07u /rrent of 12 A flows from the battery, how much current flows through any one of t7suu)0cz39 nf py m/lbhe 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 in4 vf+-qu/hsl yit//8vza o(fr series to a 12-V battery. What is the voltage across any one ofu i/z -vh4 ra/(qsofyl +fv8/t 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 constant voltage source-bqf q:aa4 co), the power supplied byfa :coaq -4)qb 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 are .d5-a yp uge,econnected 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 padl mvm,)i -l:frallel, 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 connected in parallel to 6:zrozt8x 4wyh(x x -oa 12-V battery. What is the voltage of axt8hy- 6:x(o4orzxw zny 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 parallel to a battery. If the ck bse x5rd+4n1urrent of 12 A +bxkrs en1 4d5flows 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 conne1l r(rs(bakp i5zh0/d cted in parallel. What happens if one lamp burns out? (Assume negligible resistance in tbh p (/al5rk sir01(zdhe 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 2pi8 1 k9 9yxblt40xnspval/zparallel to a constant voltage source, the power suppl2 paxktl9v4 0z/sx bl8yin91 pied 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 poh,n55c7tr*7*gs3 z kmatjaqg wer 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 netszkj7gm c7*rgn,35ta*ath q 5work 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 junctiogw kxz4i. v.h:n 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 looua15 p2yetb x*p 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 ijlas/l xcl2dt7vn n 0)*-)sxy s 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 examplxujffa2lu439 e 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 13 ,oj xi/fx(m2upnxhyk;uv.k jtf3+ is valid for the circuit 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 tovah8+kcnlu5*z -6z 0dtiihl1gether in series ("+" to "-" to "+" to "-"), and place them in a8t l1lu0ii khd *5h-a+vz cz6n 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 bat f)8 mgyr/v;od8 so6gvteries together in series ("+" to "-" to "-" to "+"), and place them in a circuit, the ) f om8g/dg;8yvrv 6socombination 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 identica3q*:zt cthy 0ml storage batteries together in parallel, and place themcy*0tqmh3: tz 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 connecten59ich 70lw5z zxkl+fd 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 n 0n f/uu329ukznl+shgir7y9pbzt6 (, the equivalent capacitance of the combination 6uszy+ ir39u(n 02lh t/nb7n g9z pfukincreases.

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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 al+d8 rf )z69xm0luvw battery. If a total charge of Q flows from the battery, how much c z6w8md9uxf+ ar0llv) harge 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 d8y ze;wr4 1 e 100)xrxijsjnwin 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 cqer3-h9t:gv k(n yd d7onnected in parallel, the equivalent capacitance of the combinav-dk 3y7 9t:egrq hd(ntion 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 batte1r vz+ri dgo-fb9u0t(ry. If a total charge of Q flows from the battery, how much charge does each capacitor catburi0v zof-(dr1+g9rry?

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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 q8ut a s5d 4pprx8-nwlgh x*4)g9ymm 7buantity 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 ser m9i pd0pxz6g9ies to an ideal battery of constant terminal voltage. At the moment contact is made with the battery, the voltage azp 9xmg0d ip69cross 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 connected in serie): w az*h-6u7cs ecy+ dbrz7cws to an ideal battery of constant terminal voltage. At the moment contact is made with thu 7rcy w7bz:a+sdew 6c)- *chze 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 cap, )0a 4f mtuwss6tji*lacitor are connected in series to an ideal battery of constanisf0lua6,tw *m4j )tst terminal 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 should/1 c-coq8)wjjkgyo o 6

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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 additioj*i; clz 0kyc7n 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 r-qcehs-g 4y:obtained by properly placing an ammeter in a circuit consisting of one resistor and one gq4:h- sy -recbattery. 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 ammet1yic7/ j t7zweer'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 3)/m3g ypir;iz /s +vc,ee+d m5fxlts a voltmeter 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 resist6xn /yi5+g)m awv.cgoance

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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 b8rh o39 t.ik8 8ix:ai2zo+hqy e /vesvoltmeter across a resistor. What happens to the total current flowing in the circuit as a result ofi +8y.2hvk 8rshqe3 zo:i9i xta e/8ob 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 anlj) p3 jrj ;2+,fmzeaq ammeter, and a voltmeter is placed in parallel across both the resistor and the ammeter. This network is then placed across a battery.zj23fjrq,ej p a ;m+)l 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 anhab 1j zi(osgufn41r( d:by(+ 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 the resistance by dividing the voltmet 1(1 4gbnafdj+u hyri:zs((boer 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 a2 - c(+xzmxhk5sg5om.0, 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, and 6.)5r-l uedojxxcw /c- 0fnc3qa: :s fk50 $\Omega$ 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 e/. y.pcr hg4u$\Omega$ 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 + r7(bh/ bpsn 6u2n:fo a/r/in.ssdgginto a series 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 ftcw /u )j2zv-series combination of a 3.0 $\Omega$ and a 4.0 $\Omega$ resistor. What is the voltage drop across the 3.0 $\Omega$ resistor?

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49#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 22-A current flows into adok v2( cr.f6v 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 sc :oau3g0;iku*em x;/xzqp m3ic 0/a 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 combination of a 4.0r u knqt48zn-lj8ow*gm(ut,, $\Omega$, 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 toastergr(zsk) w/;uf, 6sg;z(u wrk )/f50-W coffee 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 yo(v3gai o:u;7 xvti h6gu can connect in parallel in a 120-V circuit without trippinitg7x: oi(huv v6g; a3g 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 2.0e w upoga-typw;5;6- h $\Omega$ 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 anf3 3) bcf5n), dp 4meflkc(qhdd 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, 6sa hasfv8uvw6oyp gk ,z4xx5*k( vx 19l0ev7 7.0, 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 b aty c5z up*((irvf7)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 9.05f-a 9 84k jywhp,euam $\Omega$ 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 g61i;4zt fht lv;-lwq9.0 $\Omega$ 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 cjgyiy mr6+r qmb,0jdm s8u)6 (ircuit 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 rrspkep7 mw*w5 /v3 krv .bu88$R_2$, 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 bm/xmgy d:8a cz9 ;5 f6wfun3fcircuit 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. 19ipbw/ s axjurfi4b:(h.q+9 o4 -4, determine 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 wo4rrf5ck1 u(q+8 wv.*hrgnp the current in the 3 $\Omega$ resistor.


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73#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  For the circuit in Fig. 19-4, determine th1 bkjoupld-v eed zt +4q tzr76q i5668-c5lwme 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 point C in Fig. 19-5?ifazs 7:pquq0wh ) rdr9,j .9w


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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 of6f .kyalfl7z+ point B relative to point 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 D relative to point Cj)vjsia1;5o epnktv +x5 +*o1 fnz2 wx 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 the battery in Fil1q33)k yd1bx wqi:xg 6jpz mov+6-t mg. 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 Fig. uj35)bxcjv:4iq y bxrc;m0*p 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 i o/b)xy,i ev2t5;byvin 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 curreni : igf3+/9/bqwptoo p 2gak3gi g 2o3wra;yl6t in 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 tmx2l1lg6 xpkif3ne3; oc n5g9he 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 tvwfg ziu u-41foqk1y8t3x)lla * . +lxhe 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 theb,/pm 7l .ft3zh +hszq 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 + cfj2a5xgh yw6v;bps u (ydu+2ozz4* solid wire connecting the upper left and lower left corners? c+adw+ vuf(zh2 j64z2oyy* g;sp xub5

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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 equivale y0k;k -b d:3zvvl.lkbnt capacitance of this combination i.3dk-:vz klvybklb ;0 s

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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 ie/ (1y8sm nii. :mijzjn series across a 12.0-V battery. How much ch /ynei(zmisj.i1 : mj8arge 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 xwa,4zey1 cy:7svdw q--3fbe*v .ijt50.0 mF capacitors are connected in series across a 12.0-V battery. What is the potential differefy *4,sc:tq-ij.e 7yvz-xeww d b3 a1vnce 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 :q lqze cas xdjzl6,46w.w) y9battery. What is the voltage across thyj6ed 9.lqzx6:a lzscw4w)q ,e 1.0-mF capacitor?

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89#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 1.0-mF and a 2.0-mF capacitor are connectez1c/tv o4+v bdd in series across a 3.0-V battery. What is the voltage across the 2.0-v1/t+4 dozb cvmF 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 at:q3gcm.m 9qo)rqw, mF capacitors are connected in parallel across a 24-V battery. How much energy is stored in this combination when the capacitors are fully char mqocr .qtg,a:3wqm) 9ged?

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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 connect 9fx,9-)x zxp0qxyeemed in parallel, and this pair is then connected in series with a 30-mF capacitor. What is the equivalent capaciyzxeqe)9,0x x9f-p xmtance 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. The combinaeqo -iwq e12ekio8b(7qwxw5mb a30m ir v820ction is then connected in series with a 12.0-V battery and a 14.0-mF capacitor. What is the 2b 2o0wi-3mq ik50 boai8emrq qxw7cv1(8ewe 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. Thspm9bg p d:,u4)n8au pxc-s .ke combination is then connected in series with a 12.0-V battery and a 14.0-mF capacitor. What is the charge on the 6.00-mF capacitoa8ubpk)9sp- 4 ucgn ,m.s:p dxr?

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94#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two capacitors of 6.0fj2 *dz/dggzfsgw 96 80 mF and 8.00 mF are connected in parallel. The combination is then connected in series with a 12.0-V battery and a 14.0-mF c w9fg z6gdfdg*js /28zapacitor. 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 chfx(j9phutp m7fz/ v9- roo +2iarged 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 dischafyq d( dksuqfq;;v;0d 9p7yx+rged 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 capacitor. The ca1 48yx.puihuxhpu g, 5pacitor is initially uncharged. The RC combination.xp g51 u4yxpi8 hhuu, is charged by a 9.0-V battery. What is the change in voltage between t = $RC$ and t = $3RC$?

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98#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 4.0-mF capacitor is charged to 6.0-V. It is then connected in series with a x 5*mifnq60kg 3igq 0*kfnm 6x5.0 $M\Omega$ 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 inyo8+q7ejua9 av v-p,rxr*adhea o591 l;*eamternal resistance of 100 $\Omega$ and deflects full-scale at 2.00 mA. What size resistor should be added to it to convert it to a milliammeter capable of reading up to 4.00 mA?

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100#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A galvanometer has a coil with a resistance of 24 5lsog )oz rxm09/tf6i.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 intern 1w xvkt;kih)j0wo 8ohm9 9jp-+itj) gal 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 coil rg)1ux1s:xozr mm3h3e esistance 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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