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习题练习：Physics Unit17: Electric Potential
本习题练习来源于51fly国际课程 (https://51fly.win)，是在线习题练习的打印版，您也可以访问本平台网站(https://51fly.win/)直接在线完成(注册并登录账号后在首页左侧输入试卷号 75 即可在线作答)，，作答电子化后可随时回放，查看每题答案与详细解析，搜藏保存任意题目；教师使用本平台可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力。本试卷的直接作答链接 https://51fly.win/test75.html
 作者: physics  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 vecto s5getq8g)4-fdjwb+8).af l.m o j xekr?

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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 *+/h(pbsf a ilis 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. Objectaekstqmrp/ tp7b93( / A has a net charge of excess electrons. Object B is grounded. Whictr 9/7pm qks3a(betp /h 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 of the elm6u f-o:glt8c ectric 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 direc(bn-dv97063:dwyxdzp i 9 nw jncl+qition 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. Ti84 ckw1t*f9ej/h duy hey

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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 500 V poten evsdk+9 yp7,ntial difference. If the potential dn7,v dks9py+eifference 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: b;upl nvlldhj y1rt.86zdj; 9acs;/ 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 mzsyylsttcv h7,68 -o/ oved from point A to point B along an equipotential surfacesly7t-t8y z sh,6o cv/.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface muhdcp* (v) 02zd 43qnbqqfs1vv st 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 bqqkj5 so ss8vm(, al.ir49s gg+9 vuy0y a particle carrying a charge equal to that on the electron as a result ofsgy 05gvi49rqmqjksoav+s 9 u8,(sl . 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 uni -;v8i *jjl+pvm,irqve7)og k t 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 tod4jl:qmzq*ft3. gmgwg8iu. k; ewrt/+ )b t+l

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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 tl:1wvnn9wbzavi /8, positive point charge is 100 V. What is the absolute n/l8vbaw v it:9z,1nwpotential 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 disto. j6fcj.9up6ky m,lkance of 2.0 m from a negative point charge is -100 V. What is the absolute potential 4.0 m away from the same poik9 puk66ofy .cjj.lm, nt 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 squar5lnl0to)+9 nj;klail d8 o2wte is 3.0 V when a charge of +Q is located at one of the square's corners. Wjdl l)ln o 82knt;l09+5wiotahat is the absolute potential 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 is 3.0 djh r4k.c 6zam4y9to,V when a charge of +Q is located ah49 y6mto j dra.c,4zkt one 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 consistjx oulr*+pzje r ;;)p. of two 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 is o)p7 p. fhi)u9bav zas;l, 2xqa

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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 respect except that y -rz5b n9i5olktzd+. one has twice the plate area of t9tr5+- lz oizd5.ykn bhe 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 h5+zpn(/h vc. omr*n haas a capacitance of C. If the area of the plates is doubled and the distance between the plates is halved, what is th/5an.n v+(z*o mhrcphe 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 thend7u uh 4tmd( *iypz:g8 is removed. The plates are immediately p :7dp8 uzig*m4 tdh(uyulled apart. (With the 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 of a given capacitor is weakened, the )o7uwcrls);h(uwc.j j5 m,q ecapacitance of tl o, rcwu;hujj(5s)cw7m.)eq hat 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-plate caf8nvd 8 i3fbo4pacitor are maintained with constant voltage by a battery as they are pulled apart. During this process, the amount of charo nf38fbv d84ige 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 capacitormk-o2;k/- k:d ogjly r are maintained with constant voltage by a battery as they are pulled apart. What happens to the strength of the electric fk /k-j-dormg k ;o2y:lield 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 materialui;b k mol *)(1ylh2pa between the plates of a capacithy*l kmo2l; au(1 ip)bor.
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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 plates of a ;qm z/uztm+z 8capacitor.8+;zz/z tuqmm What happens 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 scrzij.- 9; nn.oz z//vz*jfha capacitor holding a fixed charge. What happens to the rjs zz 9-/jn;.hfon z/z. *icvelectric 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 xk z rwd7 a)rk*w6h(5wbattery 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 of)rrkwh a(7k dxz6w*w5f. 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 h1n )efc 9s(6wjn7bdr+ obi7snr98lflolding a constant charge causes the energy stored in that capacitor n)l flf 8bjrw se dncno7rb1(6s7+9i9to

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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 76vsdq luw()euzy*i; zw() nz in that capacitoudwz (ezus)zq ivln(7* )y;w6r 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+i th:ff+ (i ;fx)rehu. What is the potential diffeh)hi u (+:tx; +efrffirence 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 potential is elbvbjbk 79 1,uf909il idsc4-50 V, to point B, where1l, db7e49ikbvu c9l9ibf 0sj 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 7 mpxu1 qy;s.si-x3y hv4hgc+ through an electric potential difference of 500 V. What is the kinetic energy of the proth gqh4m3sy-cuv1+sp;xi7x .yon?

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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 dsoc7 r8t3 ni9vifference of 500 V. 3not ivcs8 r79What 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 through a potentialu(lmju j(( b(j difference of 1200 V. What speed does it acquju(( u mb(jj(lire?

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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 do8*buxeziv7*ph pfk-6 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 accelero.s y,ny2kh l.ated through a potential difference of 500 V. What is the velocity of the electron afte ynos..,k2 hlyrward?

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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 8ql/kggcxt )4mC. The object is accelerated from rest through a potential difference, and afterward8lggc)/q kxt 4 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 elnw2fy a 7j di1jqc0l)f( yn-y8ectrical potential difference between two parallel metal plates separated by 1.0 mm. What is the electric field beiy 0fw 1jjyf8(27da)ynnc- l qtween 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 aj;gybck ae fdle;,81: magnitude of 500 V/m, is directed parallel to the +x axis. If the potential at x = 5.0 m is 2500 V, what is the potentieg ;lf:a1,k8 cdjby e;al 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 26awfb1*s 0kabj)ggytoward 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 direcs1 bg62kf)byg0a w*ajtly 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 direcf(yr * lwni1 q.f5nm9(onrv .ction of an electric field of magnitude 3.0 V/m. What is the change in kinetic ef(m(cl.oiy9n 1wf5rqn nr. *vnergy 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, separated by 0.20 m, are con61 z 3nncsgjtwk4b 18snected 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, wh gj6s8tbs n3z1k1c n4wat 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 toam(v 1 ect -uwjr sv+*ob(vg*, a 12-V battery. An electron released from rest at a location 0.10 m from the negativsju1mw*eor *a vvgc t-+(v b(,e 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-V battery. A.bhjs82b9g asent- 8mn electron relea8 nbb e -s9ghasj2t8.msed 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 t9u5gb sns25r +p7d rmihe east. If the voltage measured relative to ground at a given point in the field is 80r9s+5s 75 npgu2r dbim 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 j 4tinl0 o0mecuvd5- .east. If the voltage measured relative to ground at a given point in the field is 80 V, what is the voltage at a point 10 m.ecvno 40-ldtj5iu.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, it will acquire a-acfjc:37kc vomvva 5mp9 m*k (2fi1b kinf3a c9 cvcv15*(mmb of kijm7:-pv2k aetic energy (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 distanbcgchh 73huhv+ , (zc5ce 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 ata owc4.zm *dpeio9 c,w tik,( r0r:o.vgcf/ g* the ends of a meter stick. Find the electrical potential for the center of the meter9:w vr gt.pw,dfcrg(ko*,4mica* o i o0 .e/zc 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 -2n4g6+nzknpjfk cv i7 xi2 x+d0sb4 h)..0-nC charge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the electric potential at +n i2cn 0xz4nvh p)sbjx4 k+6kdg7fi. 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 (z ;faqkg2dpw hf*3 m320, 0) and a -2.0-nC charge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the electric potential energy of a 1.0-nC charge*ahfz2kdg3 2pfq;3w m 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,d ,v bztl:a43jgs*cf4 0). If the potential is taken to be zero at infinity, what is the work required to bring a 1.0-nC charge f zctvbf s4l,ajd:3g *4rom 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 c3ih )p/ wxl l+r:5pujyorners of a rectangle of sides a and b. What is the potential at3ur5/jl yh :+lipxp)w 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 plk0tif:e n0+e w2kbufp(,s 7i/nah ( bzaced in two diagonally opposite corners. In the other two corners are plack(:khbt fa w n70e+b2(epif/is ,u0nzed 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 (ch3. g.4u)ystjfx 1amu iarge +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 necessxmw*b.l* jz .qary to place three charges, each of 2.0 mC, at the corners of an equilateral tri.jmq*z x.l b*wangle 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 whem. sb 7x7xxgafes6 mx:h c/l50n it is charged to 10lea 6xxsx: bch7m xs7/f50. gm0 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 o6xb.+i xbo koxk;y*094iobv$0.50 \; m^{2}$ 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 i.a-p1br7el c the plates are separated by 0.050 mm. If the capacitance bacrl e-.1 7ipis 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 platd5bvr9iy,xndj( +/eax e -6uyes 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 plate separ1oe w.dlx/v msnft xi i+ p.ih5-5m17hation of 5.0 cm. If the potential difference between the plates is 2000 V, with the top plate at the higher potential, what is the le5mvm s+fihx1-pw5.iio 7. /dnx th 1electric 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-Vcfyo, /v1 4zdc battery. After the battery fully charges the capacitor, the capacitor is immersed in transformer oil (dielectric constant = 4.5). How much additional charge flowfy v4zc/1d,c os 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 is stored inb 6(lb upiw3oi76g9ew the caeu(w l9g ibwpio63b6 7pacitor?

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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 stored in the capap joh+-wg+a;e2wx wk;citor;x+w; 2gewpo jak-wh +?

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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 theyt sp1h/n.fcem(d- :x plates of a capacitor when it is connected to a 12.0-V battery. How much work was done i-y1n exphts( .d/fm :cn 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 charged so)stbooff*i+ /9 p9labo t g:8v 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 pkxzk. e 4 +:u,w+gmcdclates 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 capacivpyt53 q( u(zab dvw6.tor 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 considriurw9;0k xnuxeg/kk a7+00 sts 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 capacf yjj6ptvf)7-k8f3 ot itor 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 ij.;yte 2d8y7 wy9d scb 0hj:mxsl7,bq s constructed with plate 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 connected to a 505lanrv386j md(qol5b oo w7v 2-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 the dielectric has a dielectric constant of 5.0, what is the capacitan lvln 5j moq aorw2bdov53(687ce 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 becomt7h 2zc w(x7wc ;b6wgali6c2xes fully charged. 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, whw7i 2lx;wx2 cg b6ath6w(c 7czat is the voltage across the capacitor's plates after the slab is inserted?

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