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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 nw z x7swj ft)fa990z*rot 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 is z:rvejrz4,d+ry q *2v1z )aa na

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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 insulbahn4lrz1+j yyz+t)zr (c2, mk:a 4e tated from their surroundings. Object A has a net charge of excess electrons. Object B is groundc br4+z(t, l+4jzt rhan zym2ay1ek:)ed. Which object is at a 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 ofzzo ww,ny/-4w 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 thnsymtjq 9.9) gq /nj7se 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. fyg,d5 h7mhwqx+fn z +t*r3( kThey

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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 wth qc18 ;k9lg3fs ;rgfrom rest to a speed v by a 500 V potential difference. If the kfwr l; 93 ;8cgqg1hstpotential 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 a7ypj4t c.otho*f,q+ cxp.n5wre 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 moved from point A to point B along an equipotential 697dy v1qqq9xf:kuzr surface7d1vfz :6qku r xy9q9q.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface must2m5f ppv7m sx :y v3sk0w;fr,g 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 tog-fwcjj k.v a8z08to* that on the electron as a result of moving through a potential ditckwfg8jo- 80. a* jvzfference 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 kv:96w hpfakp7s ptru1* 56xrunit 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 corresponds taeiukw0+fco fk5 wg;( *i*x2ea0ew c ;o

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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 distance3xmk.ny fh7 j2 of 2.0 m from a positive point charge is 100 V. What is the absolute potential 4.0 m awamh 7.2 kn3yfjxy 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 of 2.0 m from a negative point chd/zp 1wi l,pm9arge is -100/d9zpp 1,wi lm V. What is the absolute 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 exact center of a square is 3.0 V when a chargpu1ga fn5cmw1 )zr4m,;y-ar ve of +Q is located at one of the square's corners. What is the absolute poten wr,nu m)ar;1a4 cyfv1 zp5-gmtial at the square's center when each 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 the center of a square x2 /z 6q7vydhdis 3.0 V when a charge of +Q is located at 7/qd26dvxhzyone 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 char+ eshxif69-ucges 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 voltvxx- ;q9vm rwsj-b/(yf w/*2yv qs8xb 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 d1 x2yz dhb .z/oy)as.identical in every respect except that one has twice the plate area of the other. If the smaller capacitor has capacitance C2zoy.sy / h1z).db xda, 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 :,7 q iw vwhjh3zw25d*vawle(e3fe17gr iii )C. If the area of the plates is doubled ) 3a7riwz7 q21wi v fgih5liw:d*e3we v( ,ejhand the distance 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 capaqj t(uc:3(;qhfsy 5pn citor fully and then is removed. The plates are immediately pulled apart. (With tf;cq(py(ht u:sj5q3n he battery disconnected, the amount 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 plates ofi28tuky- u q.v a given capacitor is weakened, the capacitance of thaq28uv-.uk yi tt capacitor

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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-p8 dvga,ugirnr 0 0;znh*9ue -jr9-xhdlate capacitor are maintained with constant voltage by a battery as they are pulled apart. During this process, the amount of charge8ru0a z x9ig-g-*drr09nduh n e;j,hv 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 maintawh e c/,+)jltzs2uwj0cy4w)zined with constant voltage by a battery as they are pulled apart. We,chy4 )wlct w0js+uw)2zj /z hat 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 materiav*o(k dg711uep3+u q s.ar bwel between the plates of a capacitor.evqpe1og.warsu1 37+ub d( *k
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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 between the qr:l2 u+t0/o,e wuwr hvqp5f- plates of a capacitor. What happens to the capacitancefwlor+2: - 0 pqetv/,u uqrhw5?

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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 beriq 1aj0u;p (w1akftm s;i5y: tween the plates of a capacitor holding a fixed charge. What happens to the electric fqk a 5(0a;:ij;tr yi1supwfm 1ield 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 capa c3+lau5p2y * iwt*zvvcitor is connected to a battery and becomes fully charged. The capacitor is then disconnected, and the sepa3il52c +*pyt zua* vwvration between the plates is increased in such a 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 capacitan c9.cpumm q/c9y0 uoh-69r4a6i nstsjce of a capacitor holding a constant charge causes the energy stored in tha9ac ho0nr6 .y9uqscs-m 6itp9cujm4/t 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 stor-g9 3uokrs 8wjed in that capacitor o sgrw38 j9ku-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 to point B.vf8ynfc (bsx::o 4*fq What is 8ff4y*n sf q x:bo(:cvthe potential difference 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, where the potentiamia ;zl m,s.4nl is -50 V, to point B, whern, ;isl zm4.mae the potential 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 rest, is accelerated through an electric poj5fg 1:ob:mt vtential difference obj:v: t5m1g fof 500 V. What is the kinetic energy 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 iv.jit*bd(v6*+cg b e rest, is accelerated through an electric potential difference of 500 V. What itcdb bvgv6 *j*( i+i.es 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 through a pote84:inv5p ew: 3npzzhrntial difference of 1200 V. What sp:p4:n n 8zehvp5wri3 zeed 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 mopufa3;wo) bodx5p wyw (.n36a1dz0 gpving $8.5 \times 10^{18} \; electrons$?

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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 acceoqd70e:nc;hnk qi2 4k bsb yd-a:c)tf1 x)y*c lerated through a potential difference of 500 V. What is the velocity of the electron afterwardd: :s qb nt na0;ciq1h2ko)*-fc cx e)dy4byk7?

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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 acceler8u 9z18k nf1uaxy o59cwoem 9fated from rest through a potential difference, and afterward the ball is moving at 2.0 m/s. What is 8uk9 nzwoy5efafcmxu9 198o1 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 main3rq 4r :zg by98yetzl-tains the electrical potential difference between two parallel metal plates separated by 1.g qr4by -trl z8z3ye:90 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, witi- 5m.hzqdwv/+o9 rc -ef5ntsh a magnitude of 500 V/m, is directed parallel to the +x axis. If the potential at x = 5.0 m is 250dv+.rcmht -e s5w9/ -zfonqi50 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 of 50 N/C directed toward the east. u2 bibcn( ns45tl;.izIf the voltage measured relative to ground at a given point is 80 V, what is the voltage at a point 1.0 m dir(cu5 .s;bz tl 4nbi2inectly 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 magn2aj nurj(t )*w)3n/fjps1l b zitude 3.0 V/m. What is the change in kinetic energy of the prota f)wz*jj1 n2s /)n tl(bpujr3on?

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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, ar s+7.fhci(a2 tjqa/ kme 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 1.50 m from the positive plate, what is the poten.a/ m iqt(7h +akcfj2stial 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. lzbice7slo, 7a65;fdkr w p.720 m, are connected to a 12-V battery. An electron released from rest at a location 0.10 m from the negative platb7i s z5o.wr,d7 ;p6ak 7lfcele. 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 1k* yat 9ot62ltm )rgq+2-V battery. An electron released from rest at a location 0.1l6kyqr t*)2tatm og+9 0 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 fi rgg9g mcuif(q84 o.)r(fyk,veld of 50 N/C directed toward the east. If the voltage mea m(firky8 qc4 ,g.rg gf9ou)v(sured relative to ground 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 eazp+zh9m3plhpis j5 )102nh. td xy;vtst. If the voltage measured relative n p9y0m)d xi sl32thzvth5;z1pjhp .+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?

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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 differ6d8/(hvjc;9 *npsjzhi +x1qbkkp l j.ence of 12 V, it will acquire a kinetic energy (in the as v z lc8jj(9kj;phqd/b+*nk p 1x.hi6bsence 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 d cr+h4xil6e9zbz8/ppistance 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 meter stick. Find tun363azc xu n6he electrical potential for the center of tnzuu xca366 3nhe 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 ru5zdpz 90. zj7uf 4:t 5o5rcz9wtpu p(0, 0) and a -2.0-nC charge is at (3.0 m, 0). If the potential is tak uf: 95dztoct.z zr4jwu pz7ur0p595pen 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 s1owmf 1dvb3h*f- s d+the potential is taken to be zero at infinity, what is the electric 1f v+fodms*wdb3 1hs -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 the p1t c ,4v0o4 m,og)j*cjzlcxpxvrb5 x 9otential is taken to be zero at infinityv,x*9pjmgc jotb4)lcr ,c xo 5v4 01xz, what 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 corners of a ,t)67 lh9g8g tha nsbtvr-0gurectangle of sides a and b. What is the potential at the center of the rectangle if q = 2.0 m8t6tt-0bvgs gu,l )g7n a9rhh C, 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 pl+rv080ldbiwxd 4yz8iaced in two diagonally opposite corners. In the other two corners are placed charges of +3.0 mC and -3.0 mC. What is the absolute potential in the square's center?4+ v d8iyzl0iw d8br0x

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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 w gwa t. 1-ie0,k7rddevo7 gw-+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 charges, each of 2.0 mC *dc5sx3 *x *v(rllewh, at the corners of an *s x5r(**3 wv xdcllehequilateral 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)nb; ydg1qww3 u-.*y bg (mdcu-mF capacitor when it is charged to 10yw-u 1)yd(.b ;c*3b quggdmwn0 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 area 1 y mv7yeoxmqk-niy q 6 iuc0ipo/8 sf58--y5u$0.50 \; m^{2}$ 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 capabxmy3cjk;x 2o.s1ww0h q(2 bbcitor is filled with air, and the plates are separated by 0.050 mm. If the capacitance is 17.3 pxbsjq0 w;31.bk 2ow2bxmy (hcF, 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 9ugzxd4 2+tf . 5y.z cuyrhmojhj07b8 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 plate separation of 5.0 cm.(wo,io dmf e.9r4 qa.54ankqc If the potential difference between the plates is 2000 V, with the top plate at the higher potential, what is the elec (5cder ownoi .kma,q9.44af qtric 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. Afmu* 2crlj. .* h2myrt km,3aagter the battery fully charges the capacitor, the capacitor is immersed in transformer oil (dielectric constant = h. ayug*m,k macjm2 l.r*t23r 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 energyqv8s )hx*dhu + is stored in the caqs u)8*xhhd+v pacitor?

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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 energy storyv 0jl mh: lu mkm7,x+4nke9/qed in the capacitoqu7e9m n/yk,mvhm k4+l:x0l jr?

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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 capq p c95q+4yrk8tu*c bjacitor when it is connected to a 12.0-V b*r58py4 j kcqc+b9uqt attery. How much work was 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 charts5l ,jp3 w9me i 81ok()nwxi6hc:cfkged 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 plates r .*1 sek)3/kshl0 rgsrat7li 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 capackpzu.vc:- b3g0dgq4g o1 1o -,ysatz kitor 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 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 conw.i ;n+bkobx 1a.vmcxr)r.9 lsists 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 constructed with plate area,7q uyizbbv6h.z/ c 7g 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 aybyp)0rr1v, kf1 ww7 orea 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 ewb:)d v0r f9w50-V battery and becomes fully charged. The battery is removed a)w bfr:vwd09end 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/a3n fai 8pl2d 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 inserted. If the3 ai df28/lpna 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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