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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 vectorcq c.dj48w d8a?

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2#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  One joule per coulom n6l+ph ,yjve9tztye p (gu11.b 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 insulated from their suruon x7dz( 3qa) +2wynu/vs cc4roundings. Object A has a net charge of excess electrons. Object B is grounded. Which object is at a higher potentic2w7s/y x qvona3n) +zd4ucu(al?

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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 directio go, h*8arsyc4n 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 moving4j2;.)sp)woy iti)-qxxw woa in a direction 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 condui1x3lsct.h.r(om : )4q frgf,ks,i sncting sphere. 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 ax,:3 :8k gxkcxvnk;ka 500 V potential difference. If the potential difference is changed to 2000 V, what will the new speed of axk;:,cv3x kn8kgx:kthe 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 poii6l x w r/9/xd-chnl2,j4ftdxtla y52nts are 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 fro jb0b arl4mxqtna:fp(,1 8kd/8 lxmb 8m point A to point B along an equipotential surface.ml(481jmrbq dap t l xx ,kfb:bna88/0

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface g sqs-o(l4 op0niiufrz-: 1i )q0g1drmust 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 carryings(ki2 rxu 9 *9xi,e6wytz+nyg a charge equal to that on the electronsyne6x y,g+t9z9ux ik r(i*2w as a result 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 unic valw)n7u7 -pt 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 correspond+kl 4e7 soia a hj7xf:ogx0)u.s 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 di9*ee+nwjmh fxkx 1r+x,-h6x r stance of 2.0 m from a positive point charge is 100 V. What is the absolute potential 4.0 m awke +wrhj+,e6xfh r n1x*x-9 mxay 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 zb.hcvu 6 va)f2hl9wlzz7 3xssc0a(,cy q9r/of 2.0 m from a negative point charge is -100 V. What is the absolute potential 4.0 m away from the same poiucbs,0qxra(3hllcs h.9wc )v6afz/ v2 y9z7znt 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 bdv(qhk.x)7 nwbz)lzykc7+9 6 7be)lsu 2cdb 3.0 V when a charge of +Q is located at one ebs+y.n2wd( ) 7lcd) k6cbhz7zxkblb v u)97qof the square's corners. What 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 . t/p ;croa-ci1zc.i u3.0 V when a charge of +Q is located at one of the square's corners.r ait-c ccp/o ;1u.iz. 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 ch*hi9.v/ tx) asy+fu a vv8kv(larges 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 - gv bh )9*hx;rkrju+la

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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 evetwx -6 *)pkpbzry respect except that one has twice the plate area of the other. If the*pp)k6 wtz-bx 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 p i ku)+l,y)9m :j t9qxfub3 cc2peg,ppd+m;dthe area of the plates is doubled and the distance betweeit 2q j)l, egp)pf;p 3u 9pdxd,ym+9k:cm+b ucn 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 thenvs2s gcs 6: 7u-f8:a8bz dtuid is removed. The plates are immediately pulled apart. (With the battery disconnected, the amount of charge on the plates remain-df8: :d2uct7s6isgz 8sv abus 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,b/h 4gvg lrc8z*sdm2w d *r//c the capacitance vrd*d*cb g4//8 /hc 2rwmls gzof that 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 capacitor artm,3gxm)hq,9 p d kdik2qp,bge3e 7 p-e maintained with constant voltage by a battery as they are pulled apart. During this process, th,hp) dqkg3ieme97-xgd3,m2k , bptpqe 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-plateip lilg,;,q+ x7*kdv lzh; ymus+wa;( capacitor are maintained with constant voltage by a battery as they are pulled apart. What 7l,svip(+h zxmdg l,yawq k;*il+ ;u;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 a;n8/ocmfsvt4(q+4 f e8 wuboqvg- uj 7dding a dielectric material between the plates of a cap(u +4/s;o ft e-bu8qjwc7vg qfno4vm8acitor.
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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 paper2htpbtc ;cqke/- lh:* is placed between the plates of a capacitor./ttk l;cphb c*q-e2 h: 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 .:3jafmh5 etra capacitor holding a fixed charge. What happens to the electric fieldf3ej 5 a.rthm: 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 fuq*o cxzg e0+ox;8w8vy lly 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 storzy+ox xvc *qe go;8w08ed 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 oy p:vij)h hyg0ozi;xp2a -m5 5f a capacitor holding a constant charge causes the energy stored:jpivi2o ay ;h0xpm 55g-yh) z 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 capacitom5 :t 13dyst b pq6n-uz;u9ykbr causes the energy stored in that capap 5t;1 tsudmyb3 :b-un 96yqkzcitor 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 frox4r agjvvuw4y4 v*-/)zsojuh* j.btn8 a 0wo2m point A to point B. What is the potential differencgxowzs v8j /yo2**hau0 4)jnwbt- uarjvv .44e 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 Aea1q)9jd 74 hmb(a-oa q 9hwdk, where the potential is -50 V, to point B, where thb-w qo99hdka4 he)j am d17(aqe 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 accelerate5ca 9 uf1dskjsc86+seg u (on0d through an electric potential difference of 500 V. What iscu ufs9s0g(osced ak 8+j516n 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 rest, is accelerated through an electric plop:: f a7.pwcia-js-otential difference of 500 V. Wh ofws-ajl7c.p -a:p:iat 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 potenthleytmic ztg8 -/+()rdfy ;0tial difference of 1200 V. What speed does it acquire? fd i;yc0r -(tzlm g)yteh8+t/

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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 jtl,bp ) l(p86ihv8al rh*;cv$8.5 \times 10^{18} \; electrons$?

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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 acak/g avk*/ur 2celerated through a potential difference of 500 V. Wha*/a2r ga kvk/ut is the velocity 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 accelerated ff25ew+cq- w0 hptwr e-rom rest throug0-ehfrw w+p5cq twe 2-h a potential difference, and afterward 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 difference between two pad 4w-;o7tf2 mgetk 6v;q aizt0ralla; 2gkiteozdq 4v0 7-f;mtwt 6el metal plates separated 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 magnitude of 500 V/m, is directed pa(pbe06mh :ikc gwia9n7m+o s,rallel to the +x axis. If the potential at x = 5.0 m is 2500 V, what is the 76 hb9:n0m+(kc mopweg,saii 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 direcefb5s1b op-j *ted toward the east. If the voltage measured relative to ground at a givb5b f*ej-1 sopen 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 ofbrq) 8pc eggs-ln9 ln.z9t44q an electric field of magnitude 3.0 V/m. What is the change in kinetic energy of s9 )4 q.nbt-cqerl8 pl4nz9 ggthe 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 connected to a 12-V *9can cblq:+afhc ,w,eye9 y4battery. An electron released from rest at a location 0.10 m from the n,9wy9,caleec+h 4 :fbyna *cqegative plate. 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.cm0a9 akf7(ve k9b,pr 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 p9 ,vmkeaab0k( 7crfp9ositive 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. An ee(xn-mrhrm 78*hh6 u* mgz )tklectron released from rest at a location 0.10 m from the negative plate. When the electron arrives at a distance 0.050 nxmhtr-re *u mh(z7gmh 68) k*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/1zkakf u2k cdqcq66vz9 4d;y 7C 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 point 1.0 m directly eavaz92k46dz 6 yuk7cq fqkdc;1st 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 fiel 6j 6j6dazc9pafqj12qd of 50 N/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 point 1.0 m directly6aq 92j6cdp16 qz jjaf 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 ll0 ss. -fs-gqof 12 V, it will acquire a kinetic energy (sq-. ss0gfl- lin 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 distankhl7*e eis- jrd -fh*w s dt9vrl(5h**ce 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 the el9n* 6tbj4/ma )q v m4pat2yide7jgp,bectrical potentiy2m ,p9jt 6d4tm i ba)jnv/p74eg b*qaal for 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,avl8p-ufg -0qx y0jp,t7wjs 5 a4d2-lg, awhl 0). If the potential pwag-p7 u,-qyd l,xag0 8 5a42 hvw0 j-lfsljtis 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 -2.0-5h;fao-b m 6cenC charge is at (3.0 m, 0). If the potential is -oaec6;fm h5 btaken 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 qm3)v8(t+3 zvfzmtsql lj6atl)l 1a 8 -2.0-nC charge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the work required to bring a 1sl tjq amqtm3a 8+z)v6v(t3 llzfl)8 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 rectangle o hpki. 3m9g.onzdqx2 6f sides a and b. What is the potential at the center of the rectangle if q = 2.0 mC, a hq3.ip omkg d.2xz69n= 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 sid o. eo0c4h-r)5wwsfqjt ;p1zae. Charges of +4.0 mC are placed in two diagonally opposite corners. In the other two corners are placed charges of +3.0 mC and -3.0 mC. What is the abst0eswp.oz f ch a-q5j;owr) 14olute 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, mas9affzbrn )7:gha* t3na3rn5ks $6.64 \times 10^{-27} \; kg$) 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 thrjsblv d73+e(6z ged*n ee charges, each of 2.0 mC, at the corners of an equilateral trianglz(+ *bdd 6v7gnee3j lse 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 plat8 g s alo2kl2b c2e;db(qba1+3afn jftz1 b1-fes of a 2.0-mF capacitor when it is charged to 100+fb j 2;atlgs 1(fb3dko81a-bblcfn2 a1z2 eq 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 are4r+6(tzd8pd2v9hwh wk dzap . a $0.50 \; m^{2}$ 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 pe3v x 6z io2k 5:jspf,;1pty4vnkjma -lates are separated by 0.050 mm. Ifi,z4ova f nm5yxk3sv 2pj; 1j6tk:-pe 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 fre 2w1,ja0 nxlafm89area $0.20 \; m^{2}$ 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 g:(vrqp 9i6ulcaon 8;has a plate separation of 5.0 cm. If the potential diff u qv6;cl9:8pa(noi rgerence 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 connecd h6q5vpv qktb. yi zj*.6ct*7ted across a 100-V battery. After the battery fully charges the j c* 6h .7y.iqvv5tbztqkp6d* capacitor, 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 is stored lk60uwun bb bi:-jsj64tgxrko(4 g:e73k y6zin th4g:ty7e: kuio(k w6j3r0b j4 k bzgsxu6-bn l6e 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 energ uh0j2l*psy r6y stored in the capacitor?j2 y* slpu6r0h

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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 capacitor when it is cdtdb (6*ic+aponnected to a 12.0-V battery. pac+i6d d(t*b 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 charged so that it stores dw.ffn /joj 4g.1xw+ldl 14cw$2.0 \times 10^{-3} \; J$ 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*lt)s 4geupn t( eo vg5ug0x37;o- ayests 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 of plates p8dt2dojkem8mg;:i+e e(y; n 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)yyv1 -34huqsr4lfd)ukz ap- 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 isu,pby p*yiadc l84 5d1im;0ht 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 c59oh; o:ccgwxonstructed 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 50-V bavq7 5 gubqw(8gttery 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 dg qwq g875bu(vielectric 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 conuz:nduec e3 -2nected to a 50-V battery and becomes fully charged. The battery is removed and a slab of dielectric that completely fills the space betwe:2-zuudnce 3een 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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