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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 vects3oejg.ch q 3v2* /v1si2 icaxor?

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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)t8fvua v if,4hz5 .t bj.fwd1 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 surroundingy. gu/tl)cxm1 s. Object A has a net charmx gult )/c1y.ge 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 direction of the efge ppu*k6n de60y 62electric 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 di/tji 8h,sphpkz bn;5al+)8d grection 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 sphef pl asc608u00 igt-ware. 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 by4hd32ty3 7jkpjx / cc3.evpkj a 500 V potential difference. If the potential difference ixpc7te33ck vy2jjkj 3d/.4p hs 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 samvb/g jj e:etxp5) 9egyq:kq)q +*pe4ue 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 pointdz1,.o tzhe5 pss0v 6r B along an equipotential surface6,zv ezrs1tp ho5.0ds .

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface must c/(gp am2pc .ntjb ,2fbe

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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 to that on w 3u( k7cj/ i.cc,xx-sev a383zwny azthe electron as a result of moving throughzx. (wce38jav7u3sy x,c-3 kwnicaz / 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 univ+5w f(si. ybfj7yo9 i k 2uj/s93:tkb )qjacct 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 t)5 /v;v txnjioj(,j dho

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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 2ajhcoz)bo. wr1-4bl 2 i;tcg/.0 m from a positive point charge is 100 V. What is the absolute)r goi hcla boczj/t.21w ;-4b 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 of 2.u w6nme 64vq3;g-ls qg.j o:za0 m from a negative point charge is -100 V. What is the absolute potential 4.0 m away fro3j;quz-6va .nm6 o 4q wleg:sgm 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 *6j d3wm0jp 9,s:y i2tzdvlm jf h;*imcenter 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 af,jjldzdy3tsim 0p2mw 6*; *9jhv:i mt 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, v,l 82vgem67sf zwme 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 a egvv ,8f2zl 6 ,mws7emsecond
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 kpi7 w3zxc4yh j y(n3l,(p1xqtwo 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 izb8nqu bf6vibt+1;3i :2/vkaf3b ujx4na 5og 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 eval+ o4sk;5z ef0s tlgh+uj43j ery respect except that one has twice the plate area of the other. If the smaller capacitor has capacitance C, the larger one hgal+4hsj ;lf5 0js+e4 tzku3oas 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 the area o65jfm-l h9axhf the plates is doubled and the distance between the plates is halved, what is the new caphhjf 6mx9l5a-acitance?

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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*hp*u psn)n r .y3jrq6-plate capacitor 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 to the potential difference between the plates as they are3.n pjq)hr 6*psyr*u n 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 betweem i.,h dw8bg6nn the plates of a given capacitor is weakened, the capacitance of that capac8mibn6w ,gd.h itor

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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 constan2r c-ygf nnzax8y2ya 7/ti/r;t voltage by a battery as theay2cn fnr y;igxa /y-8tr7/z 2y 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 capacitor are ma5e7nql2y r* ydintained with constant voltage by a battery as they are pulled apart. What happens to the strength of the electric field during this proce yqed5* rnl27yss?

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26#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
State three reasons smxbb0 n6. g5 mm iyblub+-h.p1vfn8w.w q41qfor adding a dielectric material between the plates of a capacw.m4b bup+-q.1inx5 g6 nq ly0vsm8 wb h.f1bmitor.
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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 betwk.6-o+r kax l:,oaupp ii :+yween the plates of a capacitor. Wha ,ya6lur:p -o ikoak:wi+.+xpt 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 betwe6vqo i2yyix2 3;z4djyekxb 0)en the plates of a capacitor holding a fixed chargeb36 )i2v0k dox2yjz;4yexqyi. 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 connected to a ba 9latseu4 fpl*z1e,(qttery and becomes fully charged. The capacitor is then disconnected, and the separation between the plates is increased in such a way that nosz (eqa tp fu9e1l,*l4 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 cog (w2: ms;t-s++ wzk-q gxvxuapacitor holding a constant charge causes the energy stored in that cak:w+wossux2( g- vt qm;z-gx +pacitor 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 jia,u(lwc1: cthe energy stored in that capacitol c1aiuw, :jc(r 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 : )x q;rqahck:from point A to point B. What is the potential difference betweenx)aq;k c:q:rh 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 electr1k0,y f13gsq7ev sfg 3cgath +on from point A, where the potential is -50 V, to point B, where the potential is +50 Vs3ghf3eq+g0 711 cty,gvfa ks, 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,o,(asjwzh8 thr0sl n;a4; o a8 is accelerated through an electric potential difference of 500 V. What is the kinetic energy of the phn t r ao,;z88h;lsw4os a0j(aroton?

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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 throughg;1i omg 2xf6 ccao.t* an electric potential difference of 500 V. What is the speed of c*ggixm ooc2;1t.fa6 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 prot ljm,3mqag5 1 lhaa3w3on falls through a potential difference of 1200 V. What speed does itg3j 1a3m wq l5hal3m,a 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 i,b ym6xtdb92 y p9;/mwc fw3ujn 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 accelerated through a potents4.jtw eih.w2:p9e faial difference of 500 V. What is th.ief t9phewsw24:j .a e 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 from re(m lwci9q :rzves- eah3 :hj/-st through a potential difference, and afterward the ball is moving at 2.0 m/s. What is the magnitude of the pote :-(h9j:v qmeics-l3aezr h w/ntial 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 pocphag .-+h ;,z6q j*vhg7dnuo tential difference between two parallel metal plates separated by 1.;*+ogqaz,.dcv7hh jh 6- u pgn0 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, wit v9wq g 6. wrw3m lhsfv-mj,r1g*ltf+8h a 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 potential 9mflgq 1+fs- 6,r* wl mw8htjgvvw.r 3at 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 directd1 -a6 0vmtjnmed toward the east. If the voltage measuredmt6ajnd1 m v-0 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 field of magnitz mq4hu-c +pz fi7woskr9:n 74ude 3.0 V/m. What is the chw 4h zn k-fq7:u9 p4m7sc+zroiange in kinetic energy 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 connected to a 12-V 3p.,klw cc5ho 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 potential difference between the initialk, p.3ccohl 5w 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,* meave6fs*ji)9w9op 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 positive plate, how muchi9*wm*p6se o)jaef v9 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 batte2l4)+r hmq czrry. An electron released from rest at a location 0.10 m fror 42mqzh) crl+m 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 fieldj4sm h9b:j (ek of 50 N/C directed toward the east. If the voltage measured relative to ground at a given point in the field is ( 4e:sb hmkj9j80 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 east. If the -d z:x4ru7uwsvoltage measured relative to ground at a given point in the field is 80 V, what isr:u-zw7d4us x 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 difference of 12 tp03 9 zl,i pw1w6id++kigumbV, it will acquire a kinetic energy (in the abseplmtww+16kbi, p g+3iuid 9z 0nce 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 distancex1eiz7f18)p eoiuse3 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 ar.snxpvg6vf k8*8jez *a hy7u4e at the ends of a meter stick. Find the electrical potential forh n6 zsjufy*8*p8g vk.ea47vx 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 7wom)+*vmepm/c5hwi* a crt 3 m, 0). If the potential is taken to be zero at infinity, whatp me/wm)hocvwi a+*c5 r7*m3t 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 -2.0iqrcu-p9g6 a n0dxs7,-nC charge is at (3.0 m, 0). If the potential is taken to be zer6,dcxpu 9sig-0rq7n ao 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 charg hb 3/kid4 otc6t0k.8qxu4deee is at (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 chargebtqcx6h/ k k0o d4d4 e3te8.iu 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 p.fjbvz mjpm-gn37yt6;9q 6ozlaced at the corners of a rectangle of sides a and b. What is the potential at the center of the rectang-v6ommz9 .yn p7b jz3 j6ftq;gle 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 two dx z53v0a-tf:ju 9dyx /o w6kujiagonally opposite corners. In the other two corners are plau0/ 9fx d awozu6x3j:v y5k-tjced 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 (charge +2e, i(a73;ozva;ajm z53t o8jium;sr dj0srw 92jmass $6.64 \times 10^{-27} \; kg$) 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, at the 6 tso 86t/qwi,j tqh:mcorners of an equilateral triangle o6mt sqi jh/ 6q8wo,tt:f 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 wh/wif (op h2 ol;4 v ,+amv*yhc8m1s.uzwfd7kwen it is charged to 10ldzc 2fpv v;7 (hw o+okfhm1*wau i,smyw /84.0 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 capac)xz(+ jcvi5(ts;/ uon0 v jxrsitor has 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 is f, :xyo7l+hkf5 ,d/ krqewx 1fcilled with air, and the plates are separated by 0.050 mm. If therkx 7f,f /5:y kce+ q,x1dolwh 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 play e09l8:drdb1pbk o+dtes 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 separation of 5.0 cm. If t3+4lwe pks38t j w.ntet dn*h2he potential difference betw8ntn34* .+ kslh t dtee2w3jpween 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 / ) nzld0/wuvw100-V battery. After the battery fully charges the capacitor, the capa)zdlv0/nwuw/ citor 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 tn 8jt(0mw8ecp m,qt9stored in thmnpqt9 wt, (cejm 880te 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 ener* qybfw 0u6gy kla:s,3gy stored in the capacitor?:,s3qyw0u gafkl 6*y b

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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 capac87ewph3hs,;x,nvhos 0v6 wi e itor when it is connected to si spw,h;7v 6hw0hoexen38 v ,a 12.0-V battery. 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 6ed-kz4,xz q)gq q)4wy5hzjw ; rw*bpstores $2.0 \times 10^{-3} \; J$ 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 consistsamcya71 /an:)6t w ggk 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 p67.tihgr4 m hilates 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 plates of a5 b ln5di5dy9u4sy6cgrea $1.5 \times 10^{-4} \; m^{2}$ 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.nt:y dgerlfud23,. qm9a5;z6mh5n u bclm;y 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 plate area of )a; +a(werf ey$0.40 \; m^{2}$ 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 we:k6duc cnq pqp1;68 x2ibx0connected 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 plates is inserted. If the dielectric has a dielectric constant of 5.0, what is the capacitance of the capacitwiq06b1uenpck 26 xxp8:c; q dor 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 char8- cjzma. z3yuged. The battery is removed and a slab of dielectrczmj3-a .z 8uyic 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 the capacitor's plates after the slab is inserted?

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