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习题练习：Physics Unit17: Electric Potential
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 作者: admin  发布日期: 2022-08-15 14:49    总分: 75分  得分: _____________

答题人: 匿名未登录  开始时间: 22年08月15日 14:49  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  
  Which of the following is nor ap1pw,z*m4st a vector?

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2#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  One joule per coulomb i;dyce4: uz+bhs a

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3#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two identical aluminum objects are insulated from their surroundings.4* 0 aqewrazja)5 vn7l Object A has a net charge of excess electrons. Object B is grounded. Which object is at a*l0naew5qr7) zaj4 va higher potential?

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4#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  For a proton moving in the direction of the electr,zthmd5 *ynp,ba 5/wv *lmcc6 ic field

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5#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  For an electron moving in a direction opposite to the electric fgpc;) dj- y 5n cj88:.hmqzu9fa svb7lw3e)oyield

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6#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Several electrons are placed on a hollow conducting idf* .bs-ce;q ah 90p-qzp8rg/1qgjzsphere. They

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7#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A small charged ball is accelerated from rest to a speed v by a/uwdp3gxym bwa): )i-k6y/v a 500 V potential difference. :av/ y 6ip3)bmwxd wk ay-/ug)If the potential difference is changed to 2000 V, what will the new speed of the ball be?

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8#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A surface on which all points ar+,hz;hcx9 y she at the same potential is referred to as

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9#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A negative charge is movekv,zrtf k x k6ru4;r-0d from point A to point B along an equipotential surfacev k 4kx;trf6z0rr,u-k.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface mu 974-yst t01xeg vruwtst be

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11#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The energy acquired by a particle carryindne g:r0(vh6hg a charge equal to that on the electron as a result of moving through a potenti n( vrhe6:0ghdal difference of one volt is referred to as

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12#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The electron-volt is a ugop p7+44 iazpuths +(nit of

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13#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  One electron-volt correspo n2;1dcprqh8w5z ;-hm9.pydf8hkp l cnds to

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14#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The absolute potential at a distance of 2.0 m from a positive point charge isv jw9xmt2v3j/ 100 V. What is the absolute potential 4.0 m away from the 23vj x9mw/jt vsame point charge?

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15#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The absolute potential at a distance of 2.0 m from a negative point +gx*vf c i+hek7c94epcharge is -100 V. What is the absolute potential 4.0f+egkcc7vh9p 4+* xie m away from the same point charge?

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16#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The absolute potential at the exact center of a square is 3.0 V when a ch 6kgs a1eh v+sa/.hsr frj -4qctjs70-arge of +Q is located at one of the square's corners. What is the absolute potential at the square's center when eachkj 4shrg sh1 c tj.s-07ar6e/+f vqs-a of the other corners is also filled with a charge of +Q?

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17#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The absolute potential at tm4lr-bi. q8pa he center of a square is 3.0 V when a charge of +Q is located at oneiml-r q4bp. a8 of the square's corners. What is the absolute potential at the square's center when a second
charge of -Q is placed at one of the remaining corners?

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18#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Electric dipoles always consist of two charges thb +xgn99wlmi ,tx mj*)at are

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19#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  One coulomb per volt iw(z x;zy4ta5nqvrj313a*gq b6and 2qs a

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20#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two parallel-plate capacitors are identical in every hr95sfub y )a:respect except that one has 9haufrs:5b)y twice the plate area of the other. If the smaller capacitor has capacitance C, the larger one has capacitance

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21#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capacitor has a capacitance of C. If the areac1gr 7qbt6vb : of the plates is doubled and the distance between the plates is halved, what is the new c6 qc1b t7gvb:rapacitance?

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22#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A battery charges a parallel-plate capacitor fully and th/dn hm vy(ju/2en is removed. The plates are immediately pulled apart. (With the battery disconnected, the amount h/ju2dmy nv(/ of charge on the plates remains constant.) What happens to the potential difference between the plates as they are being separated?

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23#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  If the electric field between the platesy/6tjs0naoxwh gyz )9x ;hr43 of a given capacitor is weakened, the capacitance of that capacity 4jz;tyshh/ w go)0axr6 nx93or

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24#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The plates of a parallel-plate capacitor are maintaiu)3x,f ow2r6 fniq6 hkned with constant voltage by a battery as they are pulled apart. During t6)6,3u xofq2kfh n riwhis process, the amount of charge on the plates must

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25#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The plates of a parallel-plate capacitor are maintained with constant voltagx 2lfvgbvz dc5 hy4h6-05gtx: e by a battery as they are pulled apart. What happens to the strength of the electric field during th x 2thd0lcvg:vbxg46y5zhf- 5is process?

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26#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
State three reasons for addi3ydk 5h3; yjrrng a dielectric material between the plates of a capacito5 3rr3yy;jd hkr.
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27#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A dielectric material such as paper is placed betw0iol/04k94nedw ffxveen the plates of a capacitor. What happens tofodei4w409v /xn0lkf the capacitance?

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28#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A dielectric material such as pagn pwfg- 1w5 69*s1lu w,kapmrper is placed between the plates of a capacitor holding a fixed charge. What happens to the electric field between tw9g-15lw,rnks6 *pm g p1wafuhe plates?

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29#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capacitor is connected to a battery and beyo 9t o;lz) m )a2ne-wjpta65qcomes fully charged. The capacitor is then disconnected, and the separation between the plates is increased in such a96y oq j-etwmotp2)a nz);l a5 way that no charge leaks off. The energy stored in this capacitor has

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30#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Doubling the capacitance of a capacitor holding a constant ii2h z7 *+ pwpkad;ty;charge causes the energy sa ;z;iwd kpp y72hit+*tored in that capacitor to

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31#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Doubling the voltage across a given capacitor causes the energy stored w/ohmv k .c67vq lkw n5l7(2f1faoio 4in that capacitc7hq ank42fwlo ko(lo1/56vmw.fv 7 ior to

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32#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  It takes 50 J of energy to move 10 C of charge from point A t9ge q 8t ndvyz76l4r4to point B. What is the potential difference between vg49rdqty 7le68 z4tn points A and B?

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33#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The net work done in moving an electroj)n0h;i ck-hu) ;w :,rqmf aeln from point A, where the potential is -50 V, to point B, where the pk,nmaje0rl :;hu hc) ; )-wfiqotential is +50 V, is

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34#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A proton, initially at re1 f /qkgw:sl/tst, is accelerated through an electric potential difference of 500 V. What is the kinetic energy of tf g/s:kqlt1/ whe proton?

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35#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A proton, initially at rest, is accelerated through an electric potential diffe8(fgui31qv 3nr0 su 53o tveherence of 500 V. What is the speed o1 qrv8i vuuo3s3e0ge5hn(3f tf the proton?

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36#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Starting from rest, a proton falls thriqp,,we*l -ur jf.o x8ough a potential difference of 1200 V. What speed does.x e,i-o,q r8pjf*uwl it acquire?

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37#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  How much work does 9.0:/r ku9o:rfy*c m vw)p V do in moving $8.5 \times 10^{18} \; electrons$?

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38#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A stationary electron is accelerr 2-e94ce jartated through a potential difference of 500 V. What is the velrtr4a 9ee- j2cocity of the electron afterward?

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39#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 4.0-g object carries a charge of 20 mC. The object is accea 7gi.2 gi )u07ztkctabcg+h)lerated from rest through a potential difference, and afterward the ball is moving at 2.0 m/s. What is the magnitude of the potential difference? k7t.2+ht gau agg7iccbz0))i

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40#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 6.0-V battery maintt2fdzlqjtw:e*.*:rs - om3o a ains the electrical potential difference between two parallel metal plates separated by 1.0 mm. What is the electric fi:rqdzalfs* m-2 two:t3 jo*e.eld between the plates?

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41#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A uniform electric field, with ejp)*, if(dxp,gy7to a magnitude of 500 V/m, is directed parallel to the +x axis. If the potential at x = 5.0 m is 2500 gf (ep,odjx*,y)i7tp V, what is the potential at x = 2.0 m?

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42#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Consider a uniform electric fie)h7ovt5tc at z21x4zv ld of 50 N/C directed toward the east. If the voltage measured relative to ground at a given point is 80 V, what is the voltage at a point 1.0 m directly west of7vo1 zz x )4t2a5ctvth that point?

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43#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A proton moves 0.10 m along the direction of an e l*)u84fc p r;/lo0l3owg9i iwf8 lgyllectric field of magnitude 3.0 V/m. What is the change i/gloy glpu 84l*wocw8il r9;0)l f3ifn kinetic energy of the proton?

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44#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two parallel plates,4b*do a2)ovdq5)uy(gi/; z g nouo4 mt *fvcb+ separated by 0.20 m, are connected to a 12-V battery. An electron released from rest at a location 0.10 m from the negative plauyavc/;d indo*5go )q)b +o zgo24utv(b *4fm te. When the electron arrives at a distance 1.50 m from the positive plate, what is the potential difference between the initial and final points?

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45#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two parallel plates, separated by 0.20 m, aretkrt* vxg-rw +w(zo 76ck: 9le connected to a 12-V battery. An electron released from rest at a location 0.10 x-vw 6( twlr e*+7g9okcr:kt zm from the negative plate. When the electron arrives at a distance 0.050 m from the positive plate, how much kinetic energy does the electron gain?

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46#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two parallel plates, separated by 0.20 m, are connected to a 12-14 +xubjc*zwo V battery. An electron released from rest at a location 0.10 m from the negative plate. When the electron arrives at a distance 0.050 m from the positive plate, what is the speed of thx 1*wuj b4c+zoe electron?

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47#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Consider a uniform electric field of 50 qcb wu;+ dha d63 2yh4xrr;l)gN/C directed toward the east. If the voltage measured relative to ground at a given point in the field is 80 V, what is the voltage at a xa2c;h46; dbgwr +3hulydq) rpoint 1.0 m directly east of the point?

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48#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Consider a uniform electric field0/ gseufx i jwrpw 5.d29(jf+w of 50 N/C directed toward the east. If the voltage measured relative to ground at a givew rp fg +d/w( 5fw2.i9j0xseujn point in the field is 80 V, what is the voltage at a point 1.0 m directly south of that point?

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49#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  If a Cu2+ ion drops through a potential difference of 12 V, 7(i. c yce6fnpit will acquire a kinetic energy (yfpenc 67ic (.in the absence of friction) of

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50#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the potential at a dia58u3al oeaf*stance of $5.0 \times 10^{-10} \; m$ from a nucleus of charge +50e?

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51#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two 3.00-mC charges are at the ends of a mete-piumc, n t5ek9c1b7pqn6qoinwu7-u- +v f2lr stick. Find the electrical potential for the 7cimbi7qnn 5u uo f1q pl2e6wu9 t-ck+ ,-npv-center of the meter stick.

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52#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 5.0-nC charge is at (0, 0) and a -2.0-nC charge is at (3.0 m,,8ed8jgs a)gi 0). If the potential is taken to be zero at ig)j8,a gies 8dnfinity, what is the electric potential at point (0, 4.0 m)?

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53#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 5.0-nC charge is at (0, 0) and a -2. q.xwv-/yc5az4 lq6t n0-nC charge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the electric pote 5wqa-lvncy./ qtx46 zntial energy of a 1.0-nC charge at point (0, 4.0 m)?

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54#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 5.0-nC charge is at (0, 0) and a ;6 q8p8bls ull+wjn3g-2.0-nC charge is at (3.0 m, 0). If the potential is taken to be zero at infinity, wh;lg qp86nluw3 l+8 sjbat is the work required to bring a 1.0-nC charge from infinity to point (0, 4.0 m)?

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55#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Four charges of equal charge +q are placed at the )r imfs-xbt56k4 3yxf corners of a rectangle of sides a and b. What is the potyx bfmr4 -xs3ikf )6t5ential at the center of the rectangle if q = 2.0 mC, a = 3.0 cm, and b = 4.0 cm?

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56#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A square is 1.0 m on a side. Charges of +4.0 mC are placed iij/5b)m5u7r6wnn(li,b cb ua n two diagonally opposite corners. In the other two corners are placed charges of +3.0 mC and -3.0 mC. What is the absolutewr5j/ ma)n (i5nbc7,bui l6ub potential in the square's center?

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57#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An alpha particle (charge +2(( ;gv;,3 bncr fssadce, mass $6.64 \times 10^{-27} \; kg$) moves head-on at a fixed gold nucleus (charge +79e). If the distance of closest approach is $2.0 \times 10^{-10} \; m$, what was the initial speed of the alpha particle?

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58#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  How much energy is necessary to plo-mqqd,ch) e5r pgs6y01cut +ace three charges, each of 2.0 mC, at the corners of an equilatc s q)y1rt -upgqh 0e65,modc+eral triangle of side 2.0 cm?

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59#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What charge appears on the plates of a 2.0-mF capaci1o/yk,a h4 xxqmys(2itor when it is charged to 100ok,ma1h2xiy/4 yq xs ( V?

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60#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capacitor has plates of aqldmxjk qv*n*1g4)2 yrea $0.50 \; m^{2}$ separated by a distance of 2.0 mm. What is this capacitor's capacitance?

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61#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capacitor is filled with air, and the plates are separated s3tq3b8nv;bf by 0.050 mm. If the capacitance is 17.3 pF, what is the platebnb;8 sf3v tq3 area?

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62#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capacitor has pl4jrju12+zbp l 94t*4 dc bjoteates of area $0.20 \; m^{2}$ separated by a distance of 1.0 mm. What is the strength of the electric field between these plates when this capacitor is connected to a 6.0-V battery?

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63#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capacitor has a b.taat-0fc,i plate separation of 5.0 cm. If the potential difference between the f t-,a.bca0itplates is 2000 V, with the top plate at the higher potential, what is the electric field between the plates?

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64#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 6.0-mF air capacitor irq lyj, k24 4hs.pfx74x s ooi1.8nxbns connected across a 100-V battery. After the battery fully charges the capacitor,f ,.8kb2lnp1x4 7sxh.o4 4 yojsnixqr the capacitor is immersed in transformer oil (dielectric constant = 4.5). How much additional charge flows from the battery, which remained connected during the process?

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65#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A charge of 60 mC is placed on a 15 mF capacitor. How much energy iel8xm( z/b jqcjbfo2. (6ki.bs stored in the capaci2be(j.ok/ 6 (f8ib .zjcqbmxltor?

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66#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  20 V is placed across a 15 mF capacitor. W0 lrvlpvaegm o7l/l+x 7 ,f-,phat is the energy stored in the capacitoreg7lov,- 7, xlrap/0l pm+fl v?

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67#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A charge of 2.00 mC flows ogpc /5(c(wcyihuc v0hwhc7 ,,nto the plates of a capacitor when it is connected to a 12.0-V battery. How much work was done in charging this capaci (pcwcig/ (c0v chh7,,uw5hc ytor?

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68#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  If a 10-mF capacitor is ckmx w*tel0ea9(7o k a7harged so that it stores $2.0 \times 10^{-3} \; J$ of energy, what is the voltage across it?

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69#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capacitor consists of p x c)u.,sd wx(hfmj9hw; 7-/iqky:qsllates of area $1.5 \times 10^{-4} \; m^{2}$ and separated by 1.0 mm. The capacitor is connected to a 12-V battery. What is the capacitance?

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70#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capacitor consn;cvnkbo vve+x,0+ism6v(c7o cz) /w ists of plates of area $1.5 \times 10^{-4} \; m^{2}$ and separated by 1.0 mm. The capacitor is connected to a 12-V battery. What is the charge on the plates?

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71#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capacitor consists of 75g6zddmm-r gplates of area $1.5 \times 10^{-4} \; m^{2}$ and separated by 1.0 mm. The capacitor is connected to a 12-V battery. What is the electric field between the plates?

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72#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capacitor is constructed with plate area of-in m/4 -tmj:1nqrhc i $0.40 \; m^{2}$ and a plate separation of 0.10 mm. How much charge is stored on it when it is charged to a potential difference of 12 V?

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73#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capacitor is constructed with plate aqh2tteu7l q zt9 94zt5rea of $0.40 \; m^{2}$ and a plate separation of 0.10 mm. How much energy is stored when it is charged to a potential difference of 12 V?

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74#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 15-mF capacitor is connected to a 50-V battery and becomes ds gwt,eg.geq8.5gs9 fully charged. The b9.qtgg de8eg gs,s5w .attery is removed and a slab of dielectric that completely fills the space between the plates is inserted. If the dielectric has a dielectric constant of 5.0, what is the capacitance of the capacitor after the slab is inserted?

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75#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 15-mF capacitor is connected to a 50-V battery and becomes fully charged. m36i6kel r,ce The battery is removed and a slab of dielectric that completely fills tmrl6 kc ee,3i6he space between the plates is inserted. If the dielectric has a dielectric constant of 5.0, what is the voltage across the capacitor's plates after the slab is inserted?

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