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习题练习：Physics Unit19: DC Circuits
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 作者: admin  发布日期: 2022-08-17 15:49    总分: 102分  得分: _____________

答题人: 匿名未登录  开始时间: 22年08月17日 12:52  切换到: 整卷模式

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1#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The potential difference between the terminals of a battery, when no currentd ;(3nxz1n koz flows to an external circuit, is referred to as nk 1 znd;xz(o3the

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2#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The potential difference -3* ycj;/sb lrma)ctm between the terminals of a battery, when current flows to an external circuit, is j3cm /-ytrmbcs ;)*lareferred to 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 z -b0ezs/ (hgc-1uriae2qij8to 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 inq)2 vfb)bg3d +v xf:kl/dn:l y3 khvb7 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 connectedaknuqy6b49 l 1i)sy ;j in series to a battery. If the current of 12 A flows from the battery, how much current flows through an jnqi) klab4 yyu91;6sy 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 battery71 qvme8 v0era. What is the voltage across any one of the rem18aqrvv0 7 eesistors?

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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 addeoy(a:d ) 2ehfnd in series to a constant voltage source, the power supplied b fn(da)oh:y2 ey 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 connected in2-f5+ d iay 0+yrpzznp 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:namlj j2+ rrf8r4hhmx +t6gb z.jb: , 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. What inoygu8c eu1;n mx,6*vhcd) r*s the voltage of any one of the 1n)ny8vo h g6c*mu;cu*e r x,dresistors?

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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 b9 y(qj+ ttsr/(vsw+v f 9p-ek:ypogs-attery. If the current of 12 A flows from the battery, how much current flows through any one of the resistt9qye:k+jgvsvwo tr-(ysp 9 p(sf -/+ors?

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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 paralr3sn2 x7uz )qalel. What happens if one lamp burns out? (Assume negligir 3azxs)u27nq ble 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 arr ;a2jazy;wvsfj6sa0x 0lgfthu 8 -:.e added in parallel to a constant voltage source, the power supplied by the sourcxf a0 gaf; ;jwh ayt:-js.0z8s2 v6lure

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15#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Consider three identical rd.alwm/ p8q)k* 2j qcnesistors, each 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 q 2j./aq8wpcnlk md*)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 rule (e8lg o1:(mhmmwl+vm .
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17#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
State Kirchhoff's loo3t2ggslly.zh2 lg6*q4w yf6o 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 is an examc/,h idadhuu 825g/ ach( sx0zple 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 +)g jfn(yc6lhexample of

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20#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Which of the equations here is valid for the circuit shown? +tky0 9/4)eqte(owcght zw/a


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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++p4nl5lh au k6 hsie7 ("+" to "-" to "+" to "-"), and place them in a circuit, the combination will iuk4 la7+ lne h+ph5s6provide

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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 ("+" to "-" to,.+qvt jupn/mhqm62 4kc:fwl "-" tc/j+pknqq. l6m2h uf,4v:m wto "+"), and place them in a circuit, the combination will provide

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23#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  If you connect two identical storage batteries together in- c)eirru; n6c parallel, and place them in rccue;6r -)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 connected in series to a q,/n/h3nuc3o7c ytyzb y-pxnay00 s7 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 capacitk ck9/wk- p ,l*i14hxo hfx:gpors are connected in series, the equivalent capacitance of the combinationpk lkckxo f p-g/91wx,h*4:h i 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.jjh u.(0 *-uvdea tkanw-l61a If a total charge of Q flows from the battery, how much charge doesdnjjal hk- tuve. a01u-*w6(a 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 c:)a3 5yr xoil) p ppgy:sx(4q ,rryo*nonnected 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 areh cs)w6twz h5a+pu9i-ps 6*vu connected in parallel, the equivalent capacitance of the 9ah sh)i*uwz-p up v+wc6t5s6combination 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 parallelfxjdllvg22*fz2d w. , to a battery. If a total char*.22jfdvw ,z fdx2gllge of 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 quantiz k6 h86n mwfdbjg,52qy03nyp ty 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 battem zf, 0w(jz-dary of constant terminal voltage. At the(wazjf mdz0, - moment contact is made with the battery, 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 connected in seriu,w bmc)-9z vh2gipm nk8l-y4c::m mres to an ideal battery of constant terminal voltage. At the moment contact is made with the battery, the voltage across thg lu m8-) cv:hkzrbm-49ic :,pn2ymwme 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 iqu. ysj8t y5cu5 k1b9nn series to an ideal battery of constant terminal voltage. When this system reaches its stcuqb 5y un1k8t.59yjs eady-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 shoe ud.5s6nbw5pd + 3altuld

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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 byox7tkh jfsa, xu;0o *r)d54y l 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 pl9-itih2z m+, gob*y5zjj w6vkacing an ammeter in a circuit consisting btyvz -*j 5k 69im 2i+wghjoz,of 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 amme*vzt );p /ceh(.zqzfp ter'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 normallvxntb 2ea/o19 ox:/v by 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 resistancho+bmg. 6 ej.4y( npbse

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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 obtainedr+/fo5 r py5a idfv7yvd78y2 n by placing a voltmeter across a resistor. What happens to t df 87ao5vpi yyyfr57r+vd/2n he total current flowing in the circuit as a result of this action?

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41#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An unknown resistor is wiredk7zt0psdb 8c6lk-s ;gdvz/,l in series with an ammeter, and a voltmeter is placed in parallel across both the resistor and the ammeter. This network is then placed across a battery. If one computes the value of the resistance by dividing the voltmete;/ p87vt kls0czk,6d gld-zb sr 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 ammet29x tv8vb-ik yer, 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 voltmeter readi2vyk 9vi x8b-tng 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,c6vy,h, b1x aq 3.0, 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 120aybw x(uz o /(2xr:xe/ozfd6, 12, and 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, 9ir(f w. )ajw1gqac(g12, 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 of a bs(. ftf.r njec)5hg59knn 4v/r p z7f3.0 $\Omega$ 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 combinatiolln;j iget6au *7m-su9*r a5bn 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 combinationtcn7xsgc1brey79y1 i*, ( cgk 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 paral(bgjf1y zes6ss+,d 6levrght15 0m9o lel 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 combin zj:de7 *xts/gb1a. aao e+vs:ation 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 ciqkahm8v8( z3u rcuit: 1200-W toaster, 650-W coffee pot, and 600-W microwave. If all were operated at the same time wv q8m3 (8zuhakhat 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 connw i5i,q )u2 9:asyumaxcs7nt0ect in parallel in a 120-V circuit without tripping a 20-A circuisma )si0a 5n:,tycu7uqw2 9xi t 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 2.0 2dg vg:qud) z4$\Omega$ 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 b1wa 9qz0j2ddh4g uo;and 30 $\Omega$ are connected in parallel. If the combination is connected in series with a 9.0-V battery and a 20 $\Omega$ resistor, what is the current through the 15 $\Omega$ resistor?

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59#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Three resistors of 4.0, 6x9qm4:td/k/rpiizs x.s x9w +un ;i8 g.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 and1l c04.rjcxvj 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. e4l fk36w5sw7mcj7xj(a9k ed 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 /s*ko zgzvqq4mt 22 5ca,plx )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 the circuit in Fig. 1lbep sezcwd*b*76 95 i9-2?


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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 througx l2vsrouv4*1b9. q/s ovu) n/kd.tu qh $R_2$, what is $E$ in Fig. 19-2?


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68#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the total resistance of the circuit in Fig. v :7+5i2oeg-og ; licrp+ aqtk19-3?


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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 thr hk /4v9 pfiw:sy 6+:3:oh vzgj3oyowe 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--pa txt6 r r+.fat7t-w4, determine 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 the current qthtw-)mscze3af 9w((g j0 t *6.mfh bin 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. 11tln kmar.l+ye5i4y) 9-5?


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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 rel )ikgs 7mnumz/j-a;1o ative 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 ponazdomj 10)lv*:g q+qux 3 n9dint 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 the battery iy6+q cc,7 ek qhhnw,gip6hu-:n 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 fr )/w(ro gcnso9m)v,pb ( hvw6gom 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 4vrmgmga/kr9l;g i1 7 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 the 8* bd8h-gjg86obh n+ko $\Omega$ 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 i 2x)ga :tify9nn 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 in the 1l cfv)7qe7 /ht2 $\Omega$ 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 3t ic:no1 h:sp)jo2b fthe 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 wire9( cq65xl wc.xqcz4c. ttg 4rhflp+) e connecting the upper left and lower left corntzccwr6lh. 5 +xq tlec q.f4g) (xc4p9ers?

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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. b ypo4mm:y8+y 0 ny tn-lh2j;cThe equivalent capacitance of this combina yln0oyncm2 y h-+tpm 4jb8y:;tion 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 connectehvd. 9-vp ,do q9wc*n :jlke/b0 xnh:ed in series across a 12.0-V battery. How much charge is stored in the 5.0c/9k-eq0 dvj n9o dh.elx*nh,vb: :pw0-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 si.1d p/p m,c0lp5b erberies across a 12.0-V battery. What is the potenbl i.0me p 5/1bpp,crdtial difference 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 acrossp6ja7c r5,j he a 3.0-V battery. What is the voltage across the 1.0-mF capacij7crje ap6 ,h5tor?

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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 capacitob*x ojc(+m2n or are connected in series across a 3.0-V battery. What is the voltage across the 2.0-mF ca2cx nbo m*(+jopacitor?

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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 p: dy95hqzq;9 bh y:r0u5eefocapacitors are connected in parallel across a 24-V battery. How much h95uqyrpoz 9 :qfb:5eyd0h;e energy is stored in this combination when the capacitors are fully charged?

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91#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Capacitances of 10 mF and 20 mF are connected in parallel, and this pae 7ky 26do)zbqir is then connected in series with a 30-mF capacitor. What )2yokbz d6eq7is 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 ozvx ;o:qzvpumey:09ueu00- mF are connected in parallel. The combination is then connected in serv9;:0- zpoqvy0euz uemu:0o xies with a 12.0-V battery and a 14.0-mF capacitor. What is the equivalent capacitance?

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93#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two capacitors of 6.00 mF and 8.00 mF are connectipieyduj 19(voe-t j4kgugr*1w3x 38ed in parallel. The combination is then connected in series with a 12.0-V battery and a 14.0-mF capacitor. What i v1o1w- etj 34i y8(i*pd9geugxrju3ks 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 8r wx*)2id8 4dvokrir8.00 mF are connected in parallel. The combination 8rv) oid2i wd*8rxkr4is then connected in series 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 charged throucy-w)m -:38uepfmz ya gh 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 the:bix 12g4eramn 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 capacitor. The 5 u x,m cd8oj8d7m,tkscapacitor is initially uncharged. Th 8cmo7kstd ,duj ,m8x5e RC combination 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.3z+ +qdql h/r2:mteg u pf32np It is then connected in series with a 3. ptrp+zl g3dq2 :q2nu3 fh/+em0 $M\Omega$ 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 resistm ( /zax/r)scl.hytt6 niw5:;kn 7fbyance 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 od77m0chgs xny2mwu/ t2y* 0wof 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 interna,c ed)gtr,oe1i7fwl+17v an xl 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 resistance of 44 d5dab(qf/o g.w9ycx0.0 $\Omega$ 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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