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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 not l1e2rnt6yk*v: 8jdt ma 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 coulomba-hm c/4j3-mv kzd -g3w.scwb is 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 ppcpg(3b .6vafpl/* qinsulated from their surroundings. Object A has a net charge of excess electrons. Object B is grounded. Which object is at a higher pl f6bp/pa.q3(v cgp*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 ele k +dndcby 85(5dxtw;kctric 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 x)z. t7 jwtyl 0oag,*fdirection opposite to the electric field

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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 sphere. 2kmo.2sphry jwz) qk:75v r+w 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 a.+/ +bpjtki qs;qxsd3o 1yua, ccelerated from rest to a speed v by a 500 V potential difference. If the potential d+. + xudj,qtk3/ 1asyb;qso ipifference 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 are at the same potentias9h9 jywkyw:q.cgk7/l u3 e6ul 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 moved from point A to point B along alqjr21h240a:vdyo3n k qb w4i n equipotential surfacl2 4b43:kanjq 0qr 2y1 doihvwe.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential sur4 r9 0qzal.bdsface must 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 carrying a charge equal to r/) vdv:bb ,adthat on the electron as a resultvr :/b),avdbd of moving through a potential 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 unitx orbu z7x7n+6 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 correspondsgztw ,dv b z)4(n:f)vp 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 pointc e2.b/a01fnhg:ut 3 /la quzx charge is 100 V. What is the absol. 3flungbcuh:tx /0/qe z2a a1ute potential 4.0 m away from the same 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 distancee3iy nu(q 4j2 q5j7suy of 2.0 m from a negative point charge is -100 V. What is the absolu52jy u4 jesq3yun(q7ite potential 4.0 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 e7ma -6:to( jq3vjz 8fp 0) wiiwo(vbqlxact center of a square is 3.0 V when a charge of +Q is located at one of the square's corners. What is the absolute potential at the square's center when each of the other corneq fv3(7qjw)(im l z:jaito8bovp-w60 rs 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 the center of a square is 3.0 V when a charge of +Q iswtlc * d-db q-tuuo9)6 located at one of the square's corners. Wt*o wqd6u-9tl b-uc)d hat 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 chargo*wj:0:y*isec6 va zzes that 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 is abcpu . -o wuvci (g4dr861v5jt

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20#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two parallel-plate capacv1lao )6buplv:* 8pb 8m a1sgiitors are identical in every respect except that one has twice the plate area of thlgb6ia8*pupov 8l m1 b:v)as1e 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 area of the hmldo9:sq2, gcgl g2 q/9(swz plates is doubled and the distancd2go/gsgm 9 (q:,s wq29llhzce between the plates is halved, what is the new capacitance?

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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 then is removd t zp:)+mxm00wa3vo(0aym cned. The plates are immediately pulled apart. (With the battery disconnected, the amount of charge on the plates remaima:+d0n w 3cm0mxtya 0vp)o(zns 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 plates of a given capacitl+* bkf(s* so7bvjzi2 or is weakened, the capacitance of that capacitoob +si *72jvszk*f l(br

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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 paralzb* ki8, 1asucdjykz+6t3yf5 lel-plate capacitor are maintained with constant voltage by a battery as they are pulled apart. During this process, the amount of charge on thy 65 ,i*3zdyk fb1atusc+z8jk e 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 voltage39oyd6ci +kr6hcx-n2wi bi :g by a battery as they are pulled apart. What hapr6 ghoi-y w:dk+c ibci2963 xnpens to the strength of the electric field during this 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 adding a dielectric mat-q+v:hxc1ngo7 xqpg4erial between the plates of a capax x g1:+q7cpq4-n ghovcitor.
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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 au)e, pme)qq of0rgr 53s paper is placed between the plates of a capacitor. What happens egfq,mpoq )r0 5eru3)to 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 9v gx1186pcyin:wmy gil ot+8paper is placed between the plates of a capacitor holding a fixed charge. What happep8gvinyg cto1mw+8:l x6 iy 19ns to the electric field between the 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 becomes fully chargedlt/ imih;,l) m. The capacitor is then disconnected, and the separation between the plates is increased in such a way tha; ililmt/m)h, t 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 capacitanutlep 2f fwp14//q( hpe,;xlmce of a capacitor holding a constant charge causes the energy stored in te2 /lxft/,fp (hp1q4w em;lpu hat 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 in that flm8h l spz9shz )4b73capacitor h8p4zbszlm 7 3hl)fs9 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 osm rr pv28s8/point A to point B. What is the potential diffep8 ov82rm /srsrence between 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 electron fromc51c1o.bok q+es d1 zm point A, where the potential is -50 V, to point B, where the potential is +50 V, i1b 1e.+d 1ckqz co5omss

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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 rest, is accelerated thro( o, f3*jr gvi0q:7giaybkhj0xa z3 t+ugh an electric potential difference of 500 V. What is the kinetic energa+rz k*0x 0vio ji7g,a 3jqht 3ybg:f(y of the 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 potentialie*swq , d5qcrob*hzwl,)u86 difference of 500 V. What is the uq*rdh iolq , wcw5 *es)b6z8,speed of 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 through a potential differqv, e5;9 naoap/cmbm;ence of 1200 V. What speed does itvoeamcpa9 bq/ ;,n; 5m 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 V do in moviirua h:s-. ;ping $8.5 \times 10^{18} \; electrons$?

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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 accelerateii g0x(.te8 h,hpqbi-d through a potential difference of 500 V. What is the velocity of the electron afterwardi(i.0p-8g bhq et hix,?

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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)z(ib 19m(uzqrc (knz of 20 mC. The object is accelerated from rest through a potential difference, and ak zbz9c 1nmu((i q()zrfterward the ball is moving at 2.0 m/s. What is the magnitude of the potential difference?

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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 maintains the electrical potenwb63cw e5ssxm8,x7gvwep d* 6tial difference between two parallel metal plates ,wwg3sxw7eecs66b 8 mx5pv*dseparated by 1.0 mm. What is the electric field 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 a magnitud :+tuf6f 7au)pf7y ynke of 500 V/m, is directed parallel to the +x axis. If theu p)t7yf n7:f ykfa+u6 potential at x = 5.0 m is 2500 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 electribh o fue;64-roc field of 50 N/C directed toward the east. If the voltage measured relative to ground at a given point uhbf6 oreo4;- is 80 V, what is the voltage at a point 1.0 m directly west of 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 electric field of magniii,3kyjjte k (zy14ou r330ay tude 3.0 V/m. What is the change in kinetic energy of the protonkj 4r 1yj0 itz u33yyk,oe3i(a?

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44#
 
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 connectg(lv 8g4s p pwap:g 3,.3trxqfed to a 12-V battery. An electron released from rest at a location 0.10 m from the negative plate. When the electron arrives at a distance 1q la x3g.3stvp,gpf 48(w:r gp.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, are connected to a 12-V bat3x f o958yvbritery. An electron released from rest at rox39 yvibf 58a location 0.10 m 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 0xck/bs . p6 2k(h)dprvrt)d-f .20 m, are connected to a 12-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,rs)kh).b6r kp /x p-(ddct vf2 what is the speed of the 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 oflhypzvw kai upu5u1 l2y4z 6a;r:364co(cmx , 50 N/C directed toward the east. If the voltage measured relative to ground 46 zl 4rp(uycah wal3 p1uxvi,2k;:5zuy6 moc at a given point in the field is 80 V, what is the voltage at a point 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 field of 50 N/C directed toward the east. If thegsrd(4 py tc3s ruk06n4*xp4 q voltage measured relative to ground at a given point in the field is 80 V, what is the voltage at a pqgcd(y4 kxrr *tsn44 036usppoint 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,l4 hnq) m1gge- it will acquire a kinetic energ-e4gln1)m h gqy (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 awtolb n/9/djc+qf 4 7h distance 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 osbi l n(rt*,8ef a meter stick. Find the electrical potential for the center of t(*,8rsbn el ithe 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, 0). z4.*2chyd b +dfyy;tl+aeq4d If the potential is t+ yd.yq f h2by+*z4l4ec;tddaaken to be zero at infinity, 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 -2.0-nC charge is at (3.0 o2jed71g7 codm, 0). If the potential is 177co2gdeojdtaken to be zero at infinity, what is the electric potential 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 -2.0-nC charge is at (3.0 m, 0). If thew wdc5 tgdy(:nsw)ah),7ihq5 r eg+*e potential is taken to be zero at infinity, what is the work required to bring c w: win,d7g(yh)q 5 w)g5+esha*etr da 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*npxwa* j 2uodu, v(*s 3dze7i corners of a rectangle of sides a and b. What is the potential at the center of the rectangle if q = 2.0 mC, a = 3.0 cm, and dpo3 z7j u(axs*ni *,uvw*d2 eb = 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 in two 3ld ;0lt9 u(-vh oh;wd)timsz diagonally opposite corners. In the other two corners;tv-zlwhu (i; mdl3s0o9 t)hd are placed charges of +3.0 mC and -3.0 mC. What is the absolute 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 (char+jn fafrc37 (kge +2e, 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 place three chargwxh7(60edd c0eupr+ues, each of 2.0 mC, at the corners of an equilateral triangle of side 2.0 chd0( +ew7e cu6 0pdxrum?

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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 capacitor 5qgbd 1lg81+*fruz d mwhen it is charged to 100 V?m*r 1ul5f +g1q zd8bdg

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60#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capacitob;nnkhw (7vf5 r has plates of area $0.50 \; m^{2}$ 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 filledqy7zxv3zo ,lbwv 81-p with air, and the plates are separated by 0.050 mm. If the capacitance is 17.3 w8 ,yp371qz-lo zxbvvpF, what is the plate 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 fok/cr28z 58ld)i *v edwgv v.plates 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 capr*hftghj *71 7 p+dsrlacitor has a plate separation of 5.0 cm. If the potential difference between tj*hhr sf1g7 pltd*r 7+he plates 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 is connected across a 100-V batte:05j wgkky fji5 77goary. After the battery fully charges the capacitor, the capacitor is immersed in transformer oil (dielectric constant = 4.5). How much additional charge flows from the battery, whia7kkgjijg :f5 0oy7w5 ch 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.9*ku7)qrp)f7 ss nci io4q)wk How much energy is stored in the capac4s)pu7kr )qck i 7n *fo9sw)qiitor?

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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. What is th7tuc) o l+bprk0.rl 6ue energy stored in the capacitoru brt7r 0kulc+p.) lo6?

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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 onto the plates of a cago p ozte3q)1o6iol2a9.1n zopacitor when it is connected to a 12.0-V battery. How much work was done in charging this capacitor?p oe)6 11onogtol .z3q29ozia

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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 isvqn.ag1 ;e :rx charged 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 plates2r2)zhc: bbz p 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 consists fbm.hf(h( l,vof 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 plates of2jlnrs yy5drgn:)99r 7sgp h* 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 capaci 8ralz;ulwg v,b((*w; pnntn;tor is constructed with plate area of $0.40 \; m^{2}$ 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 txav7kk;(jmz-a o 08harea 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 --, hwj. (,wd kgwjrbcc)9 wftb0:f xha 50-V battery and becomes fully charged. The battery is removed and a slab of dielectric that completely fills the space between the plates is insbw0f dx fb:wkh- chc-j(ww9 )jr,.tg,erted. 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 ck)faw+ pxi+ mqc- /j9wharged. The battery is removed and a slab of dielectric that completely fills the space between the plates is inserted. If the dielectric 9)w+iaw cj+k/mxqp f -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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