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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 n-:i3hzdus 4 kaot 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 .5jn7zi ala11zls 8d lis 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 objetjyht in)1roiy (w*ao;v ca i*;c: xn+7dr2f7 cts are insulated from their surroundings. Object A has a njc7 ciiv*) ri+;yxy; t2tn:w h1ao arfn*o(7 det charge 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 electr ohz qk:bvz9tfj-hi 55,j .vlzq96h m:ic 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 the electric bqm q mwc8(e)n6as91 sfield

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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 a3 11fxfv 1n8 okjyap9m hollow 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 bood:v1qj n4 8bu*0harest to a speed v by a 500 V potential differencou0:4bh *baqn1o v j8de. If the 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 points are at th/-/ r nx*lfh sg- wyk.-yq5qege 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-gvl 5+hk-pepgu)n l* to point B along an equipotential surface*pl nvk-l-)g epu 5g+h.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface mus+ ,4;pdqi,us7i2ztn )gamd ect 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 equaoo u4;jebioy dk37 9/gtlr1k/l to that on the electron as a result of moving through a potential difference of one volt is referred toyoob7;j1g rkkd9eio l4 u/t3/ 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 unit:s oclt uq5yomvh()/1 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 c5ukg(rqf ,0 sii (pe; hxqkk;5n21dwto

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14#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The absolute potential anvi,qv;rdo45zp6p c0 qf/huu lszq,r 8-k .w 8t a distance of 2.0 m from a positive point charge is 100 V. What is the absolute potential 4.0 m away fru64w,pvqr;i.vu0qlz8n5 pco,k f/ z8srd qh-om 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 charge ii o,nvbbf*gk6q 7.w 5ls -100 V. What is the avnfb*wlo b .ig,5q6k7bsolute 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 whew cexl6j b1(8on a charge of +Q is located at je(68xwcl b1oone of 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 af:g64o+ylnlyu0 cm/uyjz 1 h+ square is 3.0 V when a charge of +Q is located at one of thezu yjufo+cy/1:m 6n0 hgly+l4 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 alw1221;ydfhr t1b/3sjg umt iiways consist 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 nr,q 1qhok7m +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 identical in every respect except that on ari1d* (kdd;k2*jse0/os q:* pzj orae has twice the plate area of the other. If the smaller capacitpa;orj r2(sq do ijs/zk*a e **d:k0d1or 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 haiv*j:o 80;dc: bimo16 hd:s8lq ncwjh s a capacitance of C. If the area of the plates is dobq: c: jdv8;hoc:lo* iwsmd 0 i61jnh8ubled and 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 p 5q4/ 1t) vd2)cdzkgj;aowofa arallel-plate capacitor fully and then is removed. The plates are immediately pulled apart. (With the battery disconnected, the amoua 2)j;q vtk45/z a1ogdf)wdco nt 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 g x/rr:+v yv vv07zuu5 c4r2zwhiven capacitor is weakened, the capacitance ofyrvw cuu:v702 5v r/z4vrxhz+ 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 are maioxuloy +9t 7 oll* z-7cy9-ulvntained with constant voltage by a battery as they are pulled apart. During this process, the amount of charge on the pll y+uy9 7vc*ouo-l-tx9o7ll zates 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 capacitoh tb,nx+8tc n9cmef ,1r are maintained with constant voltage by a battery as they are pulled apart. What happens to the strength of then m1btc,9h ,xenf +c8t 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 between the plates of a 4)ih8frw eh)lcapacitof ihr8)e hw)4lr.
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27#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A dielectric material bm; ojz+(b8o1ag6lc y xrrr3--(ckt lsuch as paper is placed between the plates of a capacitor. What happens to the capam6zj1- rcro- o(t3cl;kxa(8 y lb+rgbcitance?

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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 betweeuzixpoikx5q57 +k n-+ n the plates of a capacitor holding a fixed charge. What happens to the electric fie+kq + 7ix-zi5o5knpuxld 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 fully charg7qx2s- zaa3 wq5gydy /ed. The capacitor is then disconnected, and the separation between the plates is /x-q3q yazgw 5d72ays 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 capacitor holding a *rcsej60)rda constant charge causes the energy stored in tha)sc0r d6r *aejt 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 t6ee v 6/2kdkkf /8;jlusyl2q5eev g4z he energy stored in that capacite2lvlg8qe/56kk 6 z;ukd/e seyvj2 4f or 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. eactsj7mef52 ohj z(t ,6mv *+rj 8ma- What is the potential difference between points A and t+oz78cjv-jef a 6tjm*5ahrm(,s 2 meB?

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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 movin-txrlsam ,l)( g an electron from point A, where the potential is -50 V, to point B, where the potential is +50 Vsl )r ,x-tlm(a, 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 potential divs8elg1 3f.vgrv q3: yfference of 500 V. What is the kinetic energy of the pl :gq .yv8ve1fg3rvs3roton?

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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 p57pgjhyze;gqxcs, 71otential difference of 500 V. ,z75yech;x jpqg g7s1What 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 potentialm+h -kwycv;gms )r-82 cvhd8 j2hcl-m difference of 1200 V. What speed does ity8vj-d;c8g cmsw 2kmlmch+)2-h h- r v 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 9je+t+-v9,w6s dronvz 2sjgri. m8 ia 5.0 V do 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 accelerated through a potential difference of 500 V./v n lucbyt72* What is the velocitync b 7uyvlt/2* 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. d .kfrk ov :hq-95e58sw9qgkd The object is accelerated from rest through a potential difference, and afterward the ball is movinkdfg h-q 9r w5qsov9:d8e.k5kg 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 twwl zs3ml1(x-l o parallel metal plates separatedx( 1mz3 -llslw 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 fielcih2u0-.w w pfd, with 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 powic wp2.u-h f0tential 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 electcvx py)i v, wyq1:jq8ex2-1 kyric field of 50 N/C directed toward 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 directly west of that pk2jy :, y-wyxixvc 1e8)q1q vpoint?

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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 -4wj bq*ikr r(along the direction of an electric field of magnitude 3.0 V/m. What is thrkqr(w4j*- bi e change 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 bq:2qu0wh ku tium1e99p:a zr x;vgh0*attery. An electron released from rest at a location 0.10 m from the negative plate. Wphm 9; zui0uux:w*r vhq t:ea9gq 102khen 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 0.20 m, ara li63yrfd 5;hjv*rh0yleb c,+h v1( se 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 poshr;lhc hvyry*,5+ 6 iej( a13vl bdfs0itive 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 byvhop:xpp,63oidkif:d9 h (:d 0.20 m, are connected to a 12-V battery. An electron released from rest at a location 0.h3 idx6pdo kph:9(,iv: f pod: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 the east. If the6c)s e-cr:.myy y;8zt.vldvuva7j * m voltage measured relative to ground at a g)tcuvmva76. s d*:e-8l mrczyy.v j; yiven 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 east. Icos(xrdl/rr.lq. om099s 3tu1yk-s nf the voltage measured relative to ground at a given point in the field is 80 V, whs o9rrl.u/.sdmn 0-qsr o1t kc9x3yl( at 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 difference of 12 V, it wi9qrx)e58 p ilqx vl3bky/ ;n;vll acquire a kinetic energy (in the absence of frict;qn q/kbv p9l)evi 38l;xx5yrion) 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 n us3m7 zt)z-k1jc6bma distance 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 endspog5 p sb.z(6io2lt t8 of a meter stick. Find the electrical potential for the center of the meter b2s.ztolgopt(i p6 58 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, 0). Ifwq;,q 0n,ouhv0tut-f; l t f;e the potential is taken to be zero at infinity, what is the electric potential at point ;f0 le nvo qht ;f0utw-tq;u,,(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 th(+3xy2w t w rs,3qoogze potential is taken to be zero at infinity, what is the electric potential energy o+w o g3rwyq(zx 2t,o3sf 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 -2.06ypfq, +f31f3e b/ebt3bw r la-nC charge is at (3.0 m, 0). If the potential is taken to be zero at infib1bp6bq 3y a, w+f/3ef trl3fenity, 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 pbgubdzvp)64 qxr 5/dmm xk0..zws z58laced at the corners of a rectangle of sides a and b. Whdb.s gzm0z p6v5 kx z8xwr5 .dbu/)q4mat is the potential 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 pla.p dg:iu52k;sxcpcr 4ced in two diagonally opposite corners. In the other two corners are placed charges of +3.0 mC and -3.0r :c;5i4 p2xkcgpusd . 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 q91ks h, :l(m*6abw hqkvpto2 +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, ealz*m ed.ou(a tfsr )0gr7;a6 kch of 2.0 mC, at the corners of an equilateral triangle of side geftu0m( as6 *a;7d )lkr.zor 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 when it is charged a2 2gai(z.9d (b 4pwthooh x1 hwce/s1to 10(baohw ch.h2 od(s4ia9/ zt1 g2p1wex 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 capacitedsx;u+e c0kg 8m5 xxdh6bd2ad3(e 3 lor 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 filled with air, and the plates are separated 3r.h +xuft:t1sg ge7eby 0.050 mm7g+tru. t ex 1h3s:gef. If 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 capju jiu27s pwy d5v22cn.a8sg:acitor has plates 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 a79izit. t+krc-xei;e m /+54vhyj wcthe potential difference between the plates is 2000 V, with the top plate at the higher po5trcw 4t x.+e79z/ i+yvm-cah jk;eiitential, 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 100-V battery. After the batte5 e rfcj3 8ut4j;i*mrxry fully charges the capacitor, the capacitor is immersed in transformer oil (dielectric constant = 4.5). How much additional charge flows from the battery, which remained co 8rj*tu; m 35fj4rxicennected 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 c2 d+ggqn9;h8+s4)o mj clsvyoapacitor. How much energy is stored in the capacitor 8lv osjgym+4o);q2ngsd+h c9 ?

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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 aj1x-a / ftw8qu6a4d lo 15 mF capacitor. What is the energy stored in the capacao61adx /tjlu-84 fw qitor?

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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 capacitorpx3xxfkqk 9 /9it +mw7 when it is connected to a 12.0-V bat97tpx k9i3fq+xk/xmw tery. 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 ik9m ngyfxgh. hywlk3+-908 hbt 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 plaj4y *n6hubn ofy d0sj2thmd2/ y3x2mztlq 7;6tes 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 plurvdpbg/8t31bv 8 k(i ates 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 of6ve5 s a1qfm2y 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 +p-qybu :g )ktwith 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 l: 7v yi//v.qmmi+5rlof.mdxwith 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 battery and becomfo*irkuy y+az,f 2 j su(24;ev v;/4 kpjxjjg1es fully charged. The battery is removed and a slab of dielectric that completely fills the space bet ( z;uovy+*j2gkifs xf ;jjjvye1 4/uapk,r 24ween 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 c chis.w+1b(nlonnected 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 voltage as(w1c hn. i+blcross the capacitor's plates after the slab is inserted?

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