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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 a n( m0bs a,mvo3d*b ij)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 ia.rnu o:m*o 7ts 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 surwdv r6qq+i5d:roundings. Object A has a net charge of excess electrons. Object B is grounded. Which object is at a higher potenq v6rdd:wq5+ itial?

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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 4uj i0vwx((y gq)cd2 yin the direction of the electric 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 fie0j+lqe14ye (l rsnn r t:.nr;bld

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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. Th;ckc8.yczq5cp4ddo ukg5)r9r0 w3mat/h e;ney

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7#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A small charged ball9h.evw/rb 2op,-wq u.a.u j-yl2g tqe is accelerated from rest to a speed v by a 500 V potential difference. If the potential difference is changed to 2000 V, w2qj9e.-py/owbwg leuu2h- q.ta,r v.hat 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 potential is rhn6k ihr.6 cc)sh: ce;eferred 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 fromc 1)yu(/x1 *u+ rcnng- uegxzsmfx98w point A to point B along an equipotential surfac enw*uuyc-1xmf(1n9 c/ g8sr+)xu zxg e.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surfatgf:54zzs:44fx d okxce 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 ch9s4ia:t3 jw- rmjk wwbr4(f :zarge equal to that on the electron as a result of movingmiwzrt4a 4j-fs3 :wbk :w(9rj 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 unit o y+i e7ujrg+z1f

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13#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  One electron-volt corc t9zpr s 2o0*(nw+,edl(ggavresponds 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 frx32bytj;c b0r8 qgyn; )ttmxf4xts0xs 4wp 05om a positive point charge is 100 V. What is the abso4b xjbsyqx50 3 pyttwxxnr)4cm8;02f ;ts0tglute 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 distance orxo./yn(: xcv h7 p750mtyluvf 2.0 m from a negative point charge is -100 V. What is the absolute potential 4.0 m away from the same point charg: yul(povh .vcxx5m7 yn/r t07e?

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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 x+r+z d6/cnhd yl4,, r fzz3kxeu;jn5the exact 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 u,z r/6nrydz45 hcez+xn d3fk,x+; ljcorners 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 qc*ulcr-jv5) a charge of +Q is located at one of the square's corners. What is the absolute potential at the square's center when qrv5-u*)cl cj 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 twoy8ih rpo4:+dk charges 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 vffid7k(h r,4 is 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 identeh2 a)mk,9r grical in every respect except that one has twhr9 margek,)2 ice 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 hayxbagf)b/, .,ij*t :o jd h*mds a capacitance of C. If the area of the plates is doubled and the distance between the plates is halved, what is the new capaci*m*o y.gx,d,ta)dj:f bj / bhitance?

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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.uyuuc 7+-hpo/xtt oih/k v4 9 fully and then is removed. The plates are immediately pulled apart. (With the battery disconnected, the amount of charge on the plates remains constant.) What happens- hvycuxtohp7 /.+ uot/ uk4i9 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 pla-8 3be5nyh(qh7dqf v gtes of a given capacitor is weakened, the capacitance of that 8 7v5dfeyb q(nhq-h 3gcapacitor

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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 maintained with com o39 h9nsxg,snstant voltage by a battery as they are pulle9hx3o 9sms, gnd apart. During this 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 c1kls:zs di fvjgu 3w62(f,o l8apacitor are maintained with constant voltage by a battery as they are pulled apart. W : 2f8ws6gf ,(iozl3lu1djkvshat happens 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 material betwoap th* aysy ,uf4(3n9een the plates of a capah4s*tayy3fn o u9ap, (citor.
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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 betb:eln. 3n1( fjb*6zzpb / jclgween the plates of a capacitor. What haj*c6np31f:z/jb lg( l n. bebzppens 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 paper is placed between the plates of a capacljy(v i;nj sh d7l v,(-ktqh7 h/l*8taitor holding a fixed chah d,8tj- iyl( v7h/jql7 n*;hka t(slvrge. What happens 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 connef/v1 ss cq0+v(ne9x1i. txbwm cted to a battery and becomes fully charged. The capacitor is then disconnected, and the separation between the plates is increased in such a way that no charge leaks off. The energy stored in this c 9 vmcnf xb(w.x+/i ve1tss10qapacitor 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 constan9 k(gb-vs.hu *w56bze dp *wakt charge causes the energy stored iw*keb*5gb.uv69kd w hs p(za-n 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 causepb ppcri1+fc;2qug)5l,q c3b s the energy stored in that capacp,p1 pg+qlbu5;3cq)f br2cic itor 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 f(x5z;: osla8 v-rcbn*yrfb (xrom point A to point B. What is the potential dis :rxr(5anb8(x l*vzcb-yf;ofference 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 from point A:gz (z.a) we:j a5enmn: regh+, where the potential is -50 V, to point B, where the potential is +50n jrgm5 ezaage:::z(w.hn )+e 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 rest, is accelerated3c. ,nv6r,lui:vad g o through an electric potential difference of 500 V. What is the kinetic energy of the do,:i ,6 a.3vcnrvgluproton?

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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 ezmhii fll25 a8 p.74ghlectric potential difference ofp45i7 a .z2i8mg hllhf 500 V. What is the 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 thro7x5ad l vn)d9q4b6b)n3ns jd hugh a potential difference of 1200 V. What6 db ))dx7j qnl54snb3n9dva h speed does 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 V do in moving cxkr r 7.i)qz1y2s+ib$8.5 \times 10^{18} \; electrons$?

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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 accelerated through a 35: c7 vdnz+ihvfuw8g potential difference of 500 V. What is the velocity of the elec+5vhcw3vzfn :g iu7d8tron 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 acceleratedq,ale(jt)t 4f/a l: -gkj:c dl from rest through a potential difference, and af ,lkqt:/l)fl :ce 4-d jtaaj(gterward 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 potential diffekm1rsrw od61n;*t( .y d ane--6 uzcturence between two parallel metal plates separated by 1.0 mm. What 6 s -uwy1tn ;n .d-6ou*mkd1ezar(cr tis 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 magnitude of 500 V/m, is directed parallel+8zlwd:4v( 7c(x1eewmw ea2i f3mrkl to the +x axis. 3xeefll7r1wcz i (w a v+8(:42mdm ekw If the 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 electric field o*na dcvf yf5d1s 09zoq2::tubf 50 N/C directed toward the east. If the voltage measured relative to * yd: c29n ou5zt1 a0qfbdsvf:ground at a given point 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 magni+w3wer1i 8uqmx; lt1ttude 3.0 V/m. What is the change in kinetic energy of the p wwr 1+xm8 euttli13;qroton?

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44#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two parallel plates, separategh vx+wx(vew l+o jv7+uea mvh*1(+3nd 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 plate. Wh*(w x vmvheano+w lu+evv7 gh(1++jx3 en 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, are connected to a 12-V batv7 gimna,,cuu3f d5 ;etery. 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, how much kinetic energ ifv;,duu m3,5cnega 7y 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, separatedl3 ffnms-j6,7wokv9l by 0.20 m, are connected to a 12-V battery. An electrmk,fjov 3sn9 l wl-76fon 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 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 of 50 N/C directed toward the east. If th;jb9b b0n -phne voltage measured relative to ground at a given poin;pn-j9b b0nb ht 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 ea0ud3jqwjl a-izh2 ,3 v kem9u:st. If the voltage measured relative to ground at a given point in the field is 80 V, what is the voltage at a point 1.0 m directly south of that point,hduj e0vwu3j 9:q2zkl-3iam ?

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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, it will aca n0e25zzof 8g :ud1mlquire a kinetic en 1z0d5gez mf8n ao:2ulergy (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 distance qb ke bw3i++z0u+ dk i3tanx j,)l;km7of $5.0 \times 10^{-10} \; m$ 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 i q;9:3 fx o.zynotfol;v7om8 r3 erf8of a meter stick. Find the electrical potential fo:f7xf 8 t3vey8;.lznmq o39fr ri;ooor the 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, 0).nbu(. prem x52 3iji9e If the potentialij (b rx35eme.np9 ui2 is taken 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 m, 0). If the po1l 4yb jlh6*qsf8uy d2tential is taken to be zero 28 hbdyj 1ll*yu64qsf 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 ag)s ukoh33o0z t (3.0 m, 0). If the potential is taken to be zero at infinity, what is the work required to bring a 1.0-nC charge fr330osz hukgo )om 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 corners o-bguh(r+j*l :xnlc yqn6m)h r; qn; s*ks (8rhf a rectangle of sides a and b. What is the potential at the center of the rectangle; bl rmrh h*8:sn n;rgx(uq(sqlj -)ny+ hc*k6 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 in (yhljwa a h3leucgk, 4f q)2);two diagonally opposite corners. In the other two corners are placed charges of +3.0 mC and -3.0 mC. Wh ,fl(uc3 )awh)ahg2keyql4j; at 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 (charge +2e, masshh)8/95agy j7j q3 nrobb -cba $6.64 \times 10^{-27} \; kg$) 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 threehy6h2o)*ss q78 j2+l6liqkfm1c fvx5 m )ksrv charges, each of 2.0 mC, at the corners of an equilateral qlhmk 8sh7fxi*+frsyjq25s )12k6 6o)ml vvctriangle 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 capacitor when it is charged t 4pv,+ u)p-:qiai oheco 100v:eci)-iapopu+ hq,4 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 hju :x g )*1gjur-z-gejas 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 ) 8j6u bj g2h a-ponsr:y+fie*s(cpj:is filled with air, and the plates are separated by 0.05 - rpnjsej2(hy c8*g6aoispuf :+jb):0 mm. If the capacitance is 17.3 pF, 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 plates of ay753mklt9n,t u6ni zrk( g g/grea $0.20 \; m^{2}$ 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 plate separation of 5.0 cm. If the potea.sj7 -mogb *i:v6xrz z 6-auyntial dif76 gixrmz -obvj.6* ay :uzas-ference between the 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 battery. After the battery ,4;ysvs*)c y/)t zxyfrfs up4 fully charges the capacitor, the capacitor is immersed in transformer oil (dielectric constant = 4.5). How much additional charge flows from the battery, which remained connected during 4 sfytpvcz)yfxy4) sr ;u *,/sthe 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 is store/9rl z11k-( n f4qx3rl peexbbd in th 9p 1nbz3 (xq-efl el1rx4bk/re capacitor?

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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 the enzuz lwe fn 3a5zl;:z71ergy stored in the capacie5 1 n:zlz7zlfua3z ;wtor?

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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 ofwq/ 6-v7 fbs1rl +lcfn a capacitor when it is connected to a 12.0-V battery. How much work +b l/r6q7n-vw1 flfcswas done in charging this capacitor?

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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 ckx1dws oqmgoy4c1 ;u8 k t-*+lharged 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 consi;-y c)x 9csov.in6 koests 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 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 ofi*cjyy 7yk/ gigx+w76a8 bk0 z 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 capapq:7g.9 xkc vw-aso k;v9la8jcitor consists 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 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 dfpu8xj6bhf 2tct + e v/2*,6i z.krofconstructed 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 plat*ny6)v1f b xn7va bdz4g;nq-te area 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 cyczbol /2 )8z8x2rjt +dx j7ydonnected to a 50-V battery and becomes fully charged. The battery is removed and a slab of dielectric that completely fills the space between the )rzjl27/o2j c 8 yzdt+byxdx8plates 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. 2 ruq1yd(jefn vs2d)us y9;7 u The battery 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 voltage across th1e2)dr(ydy sn7;q u2v juufs9e capacitor's plates after the slab is inserted?

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