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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 n3k:kcf ) vqw*tot 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 is2txiqt)r f)8 v 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 ok* xx1h0b,qhz2n ip0y-qryoh*s u-9 qbjects are insulated from their surroundings. Object A has a net charge u,-hh09yyxoq1 rx 0biq*n-k*hqsp 2z of excess electrons. Object B is grounded. 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 direwd(6-ui 5ct0 l8dyk ,bmvexi2ction 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 nd ;lgmi9c1ysu2c z83in 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 h/;1vb 7vi vz kytt:q(pollow conducting 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 a 500 V potentiaz hlz::95uh6+xl5gv x+ em dpwl difference. If thg h e z hl5wpz+lmdvx5u:96:x+e potential 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 po-+ ln9sqn k smm(kp1ags0 cg x)6hfd v7;0m4gxints 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 from point A to point B alon+rlz q 4+md8igpu;3w;l go;cag an equipotential surfacl3 z+8 mgqd4pi wroa;c; lu+g;e.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surfarm*il2au4k b4ce 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 carryingq4 aw c,o9jxjpxg51(rwp t;q* a charge equal to that on the electron as a result p w r9 q5*joxjx4gcwq(p,1at ;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 u:(q7i3 6 xueyjayc4hd/ v3rmu nit 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 corrkor,*)sdzlx81u f wp2esponds to

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14#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The absolute potentiai6a+ki y0tm0ylx v(0el at a distance of 2.0 m from a positive point charge is 100 V. What is the absolute poti0t 6ymk v0el(ixay+0 ential 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 dist jmlu4e5d3(yjqa xq16 ance of 2.0 m from a negative point charge is -100 V. What idayq3 4qme5(ujjx 16 ls 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 whe; ,qyhf . qd.tsb5z.hkn 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 corners b,yq ..shht;q d zf5.kis 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 tq-7aif.e79 ler5 joco.e,*gskmud r c hga+ :.he center of a square is 3.0 V when a charge of +Q is located eejecik .a sdm*u 7 .7q:o+-c ralrg9h5g,f.o at 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 co* 4a:,:w -fp ,zex /pxpev5h;e4w2pv r eunvrcnsist 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 ifap b4oks(um9iopf* u/09 .if s 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 identical in every ch;l+uy6wbv- respect except that one has twice the;b-vc+ uyhl6w 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 has 0j c dajc0w(h/e)rkp)a capacitance of C. If the area of the plates is doubled and the distance between the pla k0p) ()d0/ajrwchj cetes 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 fu:sv 8.q+ykfa q(cvsyc 0u7a:slly 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 to thesu:kvv+ 7 qa0 yf8a.cc :ysq(s 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 g4xv816 sa 76bjsb4 eouihbeos af 59bsf1 m35given capacitor is weakened, the capacitance of that4fh1v61sbe 6f bb 9e5a xmbogiss7 ja84u5os3 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 capacito 2a2xo 5x/gsndr are maintained with constant voltage by a2axg2 od5x n/s battery as they are pulled 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 capacitoz1fs hl h/4q4hl ppfzo;./t.yr are maintained with constant voltage by a battery as the4; opthq .h/h p/1 zys.lzffl4y are pulled apart. What 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 pn zc.j 5wy/hx6t0rf ,:gk0 hcbetween the plates of a capacitor..hck0fg ,6zchw0tx nr5 yjp/:
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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 capacixc1 iy zxb+:4qtor. What happens y:c4+1x bqz xito 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 c/fqg3)uth(,d8kd2 itzo bn) iapacitor holding a fixed charge. What happens to the eld/d ttb n()i 2)og83k ,zufiqhectric 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 i8gr jrjfan2 :n1f j0d)s connected to a battery and becomes fully charged. The capacitor is then disconnected, and the separnf2jjd j arg8nr)1f0: ation 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 capacitance of a capacy )hfxl x 7pg5d*l0bqsu luq8wq+4:n- itor holding a constant charge causes the energy stored in tlw5dx:*sgqln ub4 q- y)hqf+x7upl0 8hat 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 ca3:ve1v8xhj hif ycirw 1us6c q m90+o8da*p2y pacitor causes the energy stored in that camrj8d 8+i 0p3 iy*ve:oxsh1c9h u fyq26 1cvwapacitor 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 e qwh9fx-e5p). What is the potentifw)p9q xhee- 5al 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 poin pm9p0;cn nk-:4cnpg-wp(vhit A, where the potential is -50 ci-:p;c9 hp-v pnnn(w0pk4mgV, to point B, where 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 n01bz8 9n ab.rt a5jbdsc0k. kat rest, is accelerated through an electric potential difference of 500 V. What is th8nka bdjbtna.s9r c k010b5.ze 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 eh 2)0z3ad cdlulwc) -slectric potential difference of 500 V. What is the speed of the proton 2d)hullc- 03dzc )wsa?

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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 potentia2p,ux-3 dkc+ 3n xgvsxl difference of 1200 V. What speed does it acn x-23 v u3cx+dkgps,xquire?

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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.jh sb)fcfs-j4/e,gb4jm5k f )ofck) 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 accelesr.,ckf, k efx .4juf0rated through a potential difference of 500 V. What is the velocity of the electron 0 k. rsfejxc,k,.u4ffafterward?

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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 from resth6s tr3g0c63 i kuyl 927ybinb through a potential difference, and afterward the ball is moving at 2.0 m/s. What is the magnitude of the potential differencg 3y0 i iytb7u9n63s26rhbklce?

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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 differenkgj 9,) uxt j:i2.,h/tc zuwvice between two parallel metal plates separated by 1.0 mm. What is the electric fiej j)2, :uktui .9zwtix g/,cvhld 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 do/lveglp: k 8 5 6bgu lq947h)ikdmvy;irected parallel to the +x axis. If the potential at x = 5.0 p lu4m);khik8l5/o g:7lygvv d96qebm 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 of 50 N/C directed toward the east. If bjj4lo v93 a:j r35vktthe voltage m5j :bv4kr 3 vl3jo9tjaeasured relative to 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 f2sdo,wp(d. 65ioyerqqhs4gil :16k eield of magnitude 3.0 V/m. What is the change in kinetic energy of the se 5s4og k(1h626:wl , ddpioeyqqr.i 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, separatewqzwuku,/0 u 2d 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. When the electron arrives at a distance 1.50 m from th0w, uu2 kuqzw/e 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, separatedc5dzg-xjet+zww/x8cu0 wi t8qk i.,* by 0.20 m, are connected to a 12-V battery. An electron released from rest at a location 0.10 m z0 ,d8q+k.x-5u/xcjteiw8izwcwgt * 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 0.20 m, are connected to a 12-V battery. An 2r4ukb2lojn 0 r3n-hqelectron released from rest at a location 0.10 m from the nk j4-2ohl0n3urbq n2 regative 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/Cr1uwq9qle-4p-h e3ke directed toward the east. If the voltage h1 9weue4k - pel-3qrqmeasured 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/t4 jwt+8 ;( hpyfibr8 3gwe:mcC directed toward the east. If the voltage measured relative to ground at a giv f ;+em pih4b( :rc3y88wttwgjen 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 pota 2z1rl:h-wgdqm2qlx1-d i;o + vo;skential difference of 12 V, it will acquire a kind o- 1-zlorsd;kiq; 22 :lhgw+a m1qxvetic 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 hf5q(s hq0ji3distance 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 en 6sf kbr7 x 1liib.+4zzhx38)j1c:xvilp alq ;ds of a meter stick. Find the electrical potential for :17l4s3h 8 lazij+lfzk16xp ixx vbbc;)i.qr 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 (3 /;hc:+lmx0 wqf zmp;+aw zjzg e9;oc0, 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 ; 9a+hq;owz z:lcz 0f;mg j+ cex3mpw/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,-eh / :yzwfl4k xo(k)w 0). If the potential is taken to be zero at infinity, what is the electric potential energy of a 1.0-nC charge at pzx/ fy: 4ohkwk)-ew(loint (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). )epmu,q,7 a2k* jkhxvIf the potentih,ma7) vk pqu*x2,ke jal is taken to be zero at infinity, 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 plaw,ha (hagz5b e:m5,qb ced at the corners of a rectangle of sides a and b. What is the pot 5amwaegh b:(,h5qz,b ential at 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 placed; vh/ u-ralc-c 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 sq/ lcc ;h-aruv-uare'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,4x+9qs,)gxtq1n o b7k1phdc l 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, eapmuvl qmp1)(e 1(/go sch of 2.0 mC, at the corners of an equilateral triangle of sm uog11q pvm)el(s/ (pide 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 i 7yfb)st* 5qa2.0-mF capacitor when it is charged to 100fqai57y )sb *t 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 plag51icgjec, * 4ly0wh4y h5amk(sbph*tes 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 filled with air, and the plates are separated ,;qa rty024x + *qrrqmqm/xz kby 0.050 mm. If the capacitance is 17.3 pF, wha qyt r2m;k4a,xq *r qm+/0zqxrt 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 oo::j-xd tf 4a/ne9 ,eet6 jehof 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. If the potentiarkbhzgn.uf*a;29q kj/9*w qv l difference between the plates is 2000 V, with the top plate at the higher potential, what is the electric field between nr/zhqqk9a2wb f. ;9*gj*kv uthe 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 10m,wxx vf77 6 m3;r1qhq77i.kjf tahuq 0-V battery. After the battery fully charges the capacitor, the capacitor is immersed in transformer oil (dielectric constant = 4.5). How much additional cha hmk77rvx13q ;6fhwjfqu .,tx 7im7qarge 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. bf5*c v-wcrdc97kus( How much energy is stored in the*9csf(cdcwur- k 7v 5b 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 k1zuh/4 6uh 8ecckxl-j: tf 4ba 15 mF capacitor. What is the energy stored in the capacitor?/f4k:c48xh16k tbuclu-hzj e

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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 ymy f(6j,5/sdj mz9v3cxn 5a*k) xslccapacitor when it is connected to a 12.0-V bat 6yazv5 sn,cjmm5/xx3sdf(cy *j l)k 9tery. 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. ql 31qh3fijw9wvk.e 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 zwf+3rjcyml nw*62/ l 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 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 capacitxpcyxf5fwcg cy (,*;7or 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 consists of platesg f;w+g ihcegfk8581j 7)i pd1xmxwg* 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 plvty wt78/2p; bsbtxcudv : enr 18;;ssate 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 o3y0r25;tssmcs/n (m0cinl mb ;u a;f 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 asy0ge1 b3 :azq 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 the dielectric has a dielectric constant of 5.0, what is the capacitance of the capacitor after the s3sybq 1ea z:g0lab 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 bah+msm -fmvf *jc.9) kittery 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 dielectrifv +*fs)mc9i -mhm.kjc constant of 5.0, what is the voltage across the capacitor's plates after the slab is inserted?

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