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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 ve 6d;fjmhgpvs3n n z75)d1fg a.ctor?

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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 *2riwscr7n pz. w 3p4xa

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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 insul,n+qy /3coadib* x0ep ated from their surroundings. Object A has a net charge of excess electrons. Object B is grounded. Which object is at a higher pxdo,+i*nye3c 0bqa / 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 electrix iuvnw2 d.pq,6+cpl7c 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 directicr sgz:* ;tu3mon 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. Th 5oc 9se3huk,gey

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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 dmhhv ofq.c,rl pyv0f;9.53s v by a 500 V potential difference. If the potential difference is changed to 2000 V, what will the news5hl,qvhfc 3pyo. vr9 d.f; m0 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 same potential i6i jv4 6iorf(bs 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 Ako z:.p ly6y bhc:2fu/ to point B along an equipotential surfacech:.2u pyylf bo6kz/ :.

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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 hmvb23(l pjx(,v k2e nbe

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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 osmc 3k 01;ivja charge equal to that on the electron as a result of moving through a potential difference o com3i0k;v1js f 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 unit2dmt lp8j )yoz9 hvqm:emr4) 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 corresp+ )l,grfc8:niup,mon0hw;rj ab2 bu5*t kzu*onds 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 distance of 2.0 mhzj7i3 z10yvxo.q( 8k k7nahl6lmk w, from a positive point charge is 100 V. What is the absolute poy vh,0( iha8wo.x3 6q jkllmzz7kk71ntential 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 2.0 m from a negative point charge is sx u,syve5v4rvls+ fyks-l 40r548pd-100 V. What is the absolute potential 4.0 m away from the same 8 pu+5kdly4r0 -4ssv5efvlvs r,x4ys 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 jusq ..: s2dauat the exact center of a square is 3.0 V when a charge of +Q is located at one of the square's corners. What2usd. s.a :uqj 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 squabc2b. 2ua+k08 -wjhi5ds sevpuv b,h8 re is 3.0 V when a charge of +Q is located at one of the ibs s up-cb j.8kb,h22vad+u05wev8hsquare'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 consist of two chargesu zdh :8mwt):.n)vu sn 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 is9ps .jyt ay2ofen4uber2;8l5km /g5l 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 respz 1eu t2 5bm*bnf2r5rzect except that one has twice the plate area of the other. If th2u zrtn2z5*1m5b ferbe 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 h 4u us6zi9d *4yw,sq0q6)lfixx6cua has a capacitance of C. If the area of the plates is doubled and the distac6 )hudf z4a 0xqy,4lwi96is *uuq6sxnce 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 parallel- nrz-(-hlw g jj9. 0do7nawldk mab4gv 2*8it.plate capacitor fully and then is removed. The platgbd(v0im -j.9dkn*row27a.w gz -48jhl nalt es 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 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 plateld)j sl;xtu (;ad1u- ps of a given capacitor is weakened, the capacitance of that capa 1l;;lauu)-sjdpd t (xcitor

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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 cappa, lvk,i (cb4vh,4 ykacitor are maintained with constant voltage by a battery as they are pulled apart. During this process, the amount of hv ,kky 4a,vl( ibc,4pcharge 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 maintained with./:h ivf+r )k hercr/h constant voltage by a battery as they are pulled apart. What happens to the strength of the electric field during thihkrh / /vr.i:hfcre) +s 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 e dl9 bahjk/*/plates of a capacitoh*/bl9 jda/ker.
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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 amj6 v .jac -di4/vroru he8h*4s paper is placed between the plates of a capacitor. W4j68 .odcm a/rrvivuhje4 * -hhat 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 plas-, 6ix-bio6wx-pfo8exen 2stes of a capacitor holding a fixed charge. What happens to the electric field bet,isx 8-6fpsxx-ob 2 ioeen w6-ween 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/*egwgm4bw i9 x6 rjzpk22b* j becomes fully charged. The capacitor is then disco k*j ebg jx6 2r4bmpz*w2/i9wgnnected, and the separation 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 capacitor holdl:goionrsh)+u 4 b (*ping a constant charge causes the energy stored in ni*:4)ob rgu o (ps+lhthat 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 the energy stored in ol5324/rm to+)lrnl +wddqih that capacitit5)+r2dowqlomh/r4 3l nl+d 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 pow ;m sgw s gkvt5382as+;t2qiwint A to point B. What is the potential differekt2m; 3 s gwgvt+ 2w5;8iqawssnce 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 dmori4i;ifo2 w)hn/ he(p)0jyc2-srA, where the potential is -50sypr/(r2nodmc2iij o)ie-w4 ;h f)0h V, 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 at rest, is accelerated throu68uoc6ae1ymeb d5/z/u ez7nr gh an electric potential difference of 500 V. What is the kinetic energy of th e ny/ 5zru8z1a7u/eecd6bm6oe 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 2)bv 70qtll+ossvo2jcn *i1y potential difference of 500 V. Wi*+ 2llvv 201bq cnojyos ts)7hat 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 potentiabk -9wk4 (dveel difference of 1200 V. What speed dwve 4e(k -kd9boes it 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..8q 8z x2ejsxauywe85 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 xuv0jf,q-a/gwds d8t0y *dp ,of 500 V. What is the velocity of the -adxw8t, gdudvs0*,jy 0pfq /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 ac lc,+nxm ki94tcelerated from rest through a potential difference, and afterward the ball is moving at 2.0nt+x4m k,c9li 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 pa6t rq- vp y5:yusrr g*a.e(5lo0 yb-jarallel metal plates separated by 1.0 mm. What -sj.geb* 65oayt ay r:ru 5y-0rlq pv(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 direy tvyt 9.nfwkrwq7) 73cted parallel to the +x axis. If the potentia7 3knqw7v9fw)ytyrt . l at x = 5.0 m 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 the vol0 dt4j37)q0josm lls itage measured relative to ground at a given point is 80 V, what is the voltage lis0som0)43j qjl7t dat 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 electree/0na.oa uq- ic field of magnitude 3.0 V/m. What is the change ia/aq u-e0.onen 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 con91ngv -iwqu2x(sm2h snected to a 12-V battery. An electron released from rest at a location 0.10 m from the negative plate. When the elenu2 s2mq1- (ivwh9gs xctron 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, are connected tolghu7; d6qac nb9ctu27 w;y6t 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 much kinetic energy does the electr l967utdn wyua;b q62hc;cgt7on 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 k(i+s x6+x h9dy ts.en0.20 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 0.050e+ixn+xd.k(stys 9 h6 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 fxx; ex4;rm/qdgsrc4 9dm*7veast. If the voltage measured relative to ground at a given point /7 e*9x4xmgrdsxmdc;;4 rqvf 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;1ex i1zn zb5w dqed9iqdg8-, field of 50 N/C directed toward the east. If the voltage measured relative to ground at a given p,wi9z1 nx1qb8dgd ;q5ee dzi-oint 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 potential difference ohnz(0q4 wem0 xkk+q +nf 12 V, it will acquire a kinetic energy (in the absence of q4whnq0e +zxk+n m0k( 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 distance of yjc, k)d p73e4nn7tat$5.0 \times 10^{-10} \; m$ 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. Find4zp-n u kx5+wb the electrical potential for the center of thwknbp+u 4x-z5 e 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 (3.0g+/mr,gj *xabl0qj)j9lm- hn m, 0). If the potential is taken to be jml)/hml,a nbgjq jg 9x -+*0rzero 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 -q.au9y) cfe 6mz.4 )z yy6ou*e e6xtqk2.0-nC charge is at (3.0 m, 0). If the potentialxozuy.yf) m6*y6u t).ekzq4 9q e cea6 is taken 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 x5ewguvukw-o;gq6 9 c2q..aka -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 1.0-nC charge from infinity to point (0, 4.0 mk-gg kx ve; 9u2wc5aq6.u .owq)?

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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 of p5:7x sc: vi0melgf1 esides a and b. What is the potential at the center of the recta 5ix1pges:e:cflm7 v0ngle 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 twol6f7; :xb*e*z/tqqvfqd w x 4f diagonally opposite corners. In the other tf *qqqe b 6:lwx7/z4fvtfd;*xwo corners are placed 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, ma7u 7 yq8;xr3xoeivs *wss $6.64 \times 10^{-27} \; kg$) 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 hpk7** s 1xkc7hji8xhthree charges, each of 2.0 mC, at the corners of an equilateral triangle ofih*x 8 pj kx71k7hsh*c 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 when it is charged to1g ej0onq e) v va)1a):gg0j ;k7dignv 100 Vngq:edvvg )gaj;o a 01j)1vig0k e 7)n?

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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 h9vvqn0zreyv+n +3f 0 eas 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 airfg5;jdqa8/rwz j 0e 8n, and the plates are separated by 0.050 mm. If the capacitance is 17.3 pgdq rn0zjj;8w5a/ fe 8F, 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 ha c z51ax(jezchh955 kds 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 pll:d;jexk831l;j qe sq 2 7emxuate separation of 5.0 cm. If the potential difference between the plates is 20uqe jeql;1m ;sd3:87l2kxexj 00 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 acr5 wp;zfrt*5+rgr: o hyuvhc9q32s5b woss a 100-V battery. After the battery fully charges the capacitor, the capacitor is immersed in transformer oil (dielectric constant = 4.5). How much additio ;5w9 c5hhz*psqfyr or3vtrb5:2gwu+nal 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 15m6fh6ztss.c ; mF capacitor. How much energy is stored in the capacitc;fz shs6 .6mtor?

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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 lp188b ne8ga+ +ydez5 q/bec;z5hhmr energy stored in the capacilq 8;gezzp+ye 1 /58b 5 nrbhcme8+adhtor?

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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 on-.bdb sngt1 io 8z;/kjto the plates of a capacitor when it is connected to a 12.0-V battery. How much work wasjsn g/ib-1 ;8bod tzk. 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 chargsvf(i4o79 iw eed 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 capaci;mx8 uov9kd) ) ks*gpttor 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 capacitor con4g tp3-u o:xexsists 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 plates of ajfhn xlah p(2i-/ 8q.a0hzl8bis/v q+ rea $1.5 \times 10^{-4} \; m^{2}$ 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 plate ar9gkuq q;c e237i3vdrv ea 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 are6x wgg+/l1o 3kck/p1xg lfl3ja 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 ta3v ihfpk7b j; .ukp4fzc./m,o 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 capacitor avk,au pb34zf. i/jfhp7m;.k cfter 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 charged. Tho t0r3r7 uv1 vh3yanlmnka)+;e 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 across the capacitor's plates after the slab is intn+ka17 0hr m lv3 vn3;urayo)serted?

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