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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 vectow wq)6la 4g)qkxd.x* gr?

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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 4h1 j qhyda8 f.rp) ndgc8 xv;:amo;x)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 objectd,);p yrfpugb-wz cz9h 2k+0xii:ao1s are insulated from their surroundings. Object A has gpfz ,ib-k+d9u ryx2 :p; 1)wc0ihazoa net 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 thefa8(bc wg /jjp1xn -a) direction 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 in a direction opposite to the electric 7t7/lwam9 b rlg51z h9l tr,mpfield

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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 sphiygk/s u+5b1a: s sj.bekxl h165y5 inere. 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 accelera w3;m-rln4dr*)zo ru ga .hl0jted from rest to a speed v by a 500 V potential difference. If the potential difference d) r4;mnr0hl3rlz-j*g. awu ois 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 same potential3k 6 ,djw4msagh4m0cml2eu fg i042ph 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 ifs/m(c *r 9wu4eofp q .9cz;tpoint B along an equipotential surfac 9u; 4*c.wsq/ m (rtpzffc9ioee.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surfafp* t:o6.x i9chzw 33jxlzh3 gce 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 car2kqqz t(o)ju 1rying a charge equal to that on the electron as a result of movqukt q)1jz( 2oing 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:st snp x;:)eunit 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 correx5u4h m8 . wmq3j3ff.vcjjow+sponds 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 m f1klo-b/ k/qgksuh s +4 bq/:jcrom a positive point charge is 100 V. What is the absolute potential 4.0 m away from the -/sk+/hb:q1jg bl 4qk /cosuksame 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 7-5rksgscmd9;pj vk5/ogq9b of 2.0 m from a negative point charge is -100 V. What is the absolute potential 4.0 m awa 9gq5jbos/r7g m-d9 skck p5v;y 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 s6 q;r-gwxefs,i9h7m the exact 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 each of the other corners is also filled with a charge of +shixs7 e6;qg f, -wr9mQ?

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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 3.0 V when a5llqz .-ei3ga charge of +Q is located at one of the square's corners. What is thz a. el53igql-e 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 charg*- d/ay k)s3-bav:ibi cr+ kjnes 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,y hnu) 9rq;o/eqipi 1otwj+/ 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 capacitohai9 pwo.u vt6)c -v-vrs are identical in every respect except that one has twice the plate area of the other. If the smw.vp-a vuiho-)t69 cv aller 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 the area ofi jbd6s)k4he0b / )j cqj-bs5l the plates is doubled and the distance between the plates is halved, what is the new capacitance q5cshj/))64bdbjei0k-sbj l ?

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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 then iedyvk6(4 v,k 15kmounyr.gj; s 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 theyyj1 g k;k.d, uo5k6y(nvmv4re 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 capacitora,w yxl)g1u/ ,ek;jm t is weakened, the capacitance of tajl/exu y w,;g ,1tmk)hat 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 capaci k2hujulw4:ok l.p3n5;uxpfgz+y b74tor are maintained with constant voltage by a battery as o 4f+4up2:7;l j b5yxul3wznpg u.kkh 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 capacitor are maintau-e s3h4vo, g.rm7thcined with constant voltage by a battery as they are pulled apart. What happens to the strength of the elect3gmt7ur hc-,.evh4os ric 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 capz(fhpmgx(/6- no*rrp wehd 5(m- 5rxm8m;a v wrwnxwhegmrx / h5(*vpr d 6(-mmom;fa -p(85z acitor.
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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 cah6uov5) j0fj kpacitor. What happens t605fj vu)k joho 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 placed5hpilabp ,:iy/ 3 f*iob yu1o: between the plates of a capacitor holding a fixed cha pofb*ao 35:yii/ : lyih,p1ubrge. 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;k-durvvd3) g v 9-xww2 ok/ui to a battery and becomes fully charged. The capacitor is then disconnected, and the separation between thdwgv9/kw)xkv u ruv2d3 o --;ie 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 holding a constant charge c(u6hyjh i8t o,b(q :na-q/hkrauses the ener i- yo6h:nqt( j/hquh,(a8r kbgy stored 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 gim w:gxoh*vck1/ dg1 7b k6p*odven capacitor causes the energy stored in that capacitor tok7bcohd6wg o :d*xm/1pk vg1*

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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 poxj3p ikr9or5c ey6 70hint B. What is the e xj5y9 3phc70oi6rk rpotential 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 point A, wht1cn v)fvx awl4-zydxs+z6 *;ere the potential is -50 V, to point B, where the potentiadt1a*-6 vnxc) s+4z;ly xfwzv l 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,f3p t.9a o,r -3pzeubv is accelerated through an electric potential difference of 500 V. What is the .9o, 3p purvb3zate-fkinetic 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 potential y bw3y66a e/ic/d 1gk .zi)umedifference of 500 V. What is the speed of the protuy kg) dwm3iae.e 6yizc6/1/bon?

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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 o hjod( e42rbrdq 8od -evi8+-potential difference of 1200 V. What speed dideboo4dedr 2oqj + v-h(8r-8oes 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 9.0 V do in mov2nik fk*) p t*6ob:gmy mnm0(ving $8.5 \times 10^{18} \; electrons$?

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38#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A stationary electron i.j5b ll5u4gs ws accelerated through a potential difference of 500 V. What is the velocity oj455 blgu .wlsf 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 -t q/cpgo aw,lyq9k-3 object is accelerated from rest through a potential difference, and afterward the ball is moving at 2.0 m/s. What is the magnitude of the potew / cl3po -kq,qyg9at-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 potentd)i**gfl b b*c15 /xeeqhx/ pyial difference between two parallel metal plates separatyl*p 1gbhq/*ie cx/e)bfx d5 *ed 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 fy o m.y/gk0a (sv4/j: -lpjdgcd7q t7parallel to the +x axis. If the potential at x = 5.0 m is 2500 V, whatpy4t7.dog/s l:v aq7m0 j c(/djgkyf- 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. xw.m037 n3p wlevm9piIf 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 poiv03 wie7mmwp3x ln. 9pnt?

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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 elec-/ ,ue*a1 hbosswo- 7avsejo)tric field of magnitude 3.0 V/m. What is the change in kinetic -v,ea w /oab7h*)sojs eu 1o-senergy 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 batt4hst - dxb8*tcery. 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 platecxb8ttdh-4 s *, 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 0.2cl+ w /*qw4uas0 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 *a/4ww+ul qsc0.050 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 connect9i56 )etkmz5suz,2kcud( m gbed to a 12-V battery. An electron released from rest at a location 5 ubd sk 6z9i)52umtk g,ez(mc0.10 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 fieldxxy +r4px 8s/q 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, whatpx /+4qxs8yrx 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. I1 1csw81eyfepq k9u;nf the voltage measured relative to ground at a given point in thek8nyfc;pqe 1us11we9 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 differenki*y+ )1q g-z)4t hr emsvq8scce of 12 V, it will acquire a kinetic energy (in the absence of friction)s) q+) rgk-ys ec4imq8z1*tvh 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 srq6xz 1 *mip(a 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 endstj;9ufc+ra3 qm0 ,/dwk edy b+ of a meter stick. Find the electrical potential uwj0 c9+a,3r;fyekmd /qdbt + 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, 0). I*j:ap1 q*zvo;(gqchx f the potential is taken to be zero at infinity, what is the electric potential at vhqa;o* xcq:p*gz (1j 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, b wuivkio ok/0i1 6*xbg6 b2s)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 energy of a 1.0-nC charge awbugi xb/61kko 20s*obivi) 6t 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 cu.4u 4shkb.e xharge 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 infineuu k.4sx4hb. ity 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 cha gcx 15ifh.2/yggfhv -rge +q are placed at the corners of a rectangle of sides af.cygv 2 5f-g/ihgx1h and b. What 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. Chodp +29 skn9n d;piiloy.ws+6arges 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 absolute po plpdi ow+9n.nis 9s;kd+26yotential 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 (chargv/j0 :cbekk9ou y8e;ce +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 thren7 j bf1zt4id.e charges, each of 2.0 mC, at the corners of an equilateral triangle of dz7.ifjn1t4bside 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 chart 8u oht02c1qoged to 100 o8c1qtt 0o hu2V?

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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 platbf/w0 cpr mx-:7 tl5+n+qc0mcppnf)j es 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 sek1mv;f4a b1:kd1h.gn+j3 o 2gown zzhparated by 0.050 mm. If the c f:zk1vw; .ogh324mjbh+nn 1k 1adzg oapacitance 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 platesp7(y.s oaqqc vat)-y) 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. 8xolg 26y im+ yrqjfz5v )g*(g If the potential difference between the plates is 2000 V, with the top plate at the higher potential, what of2rzgyqy 8lx(i+)5jvm6g *g 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 colduh v81 *r*dznnected across a 100-V battery. After the battery 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 cou8 h z*v*1rlddnnected 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 store/jk woosh xl qh2j6(8 lrlz94q;y,.hqd in th 6l w 4qlxq9o.2qj;hs k,hrojz/y8l(he 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 energy stored in 6oq-tcz ,-9vgnyd0l z.u-ig4o7km ckthe capacitogzk9,qn 0loviu7 6d-.zk4co-y g c-tmr?

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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 onpf) 0)mw n0n7 q-orhabto the plates of a capacitor when it is connected to a 12.0-V battery. How much work was done in charging nh)pqo0 ba0f 7nr- m)wthis 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 c8 o,+znb0ct xeharged 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 consists of plates of are; e90 v,w*b26bnjg lhmmk snl1a $1.5 \times 10^{-4} \; m^{2}$ 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 capacizvs ig3p3md6 ,tor 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 plates of arey ao30i+frs)c -lq3gnjv,e* mjh r(( xa $1.5 \times 10^{-4} \; m^{2}$ 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 ccogg6ql r(00 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 capaci8jlbnigzl rr+ sy,*2f871 hpr tor is constructed 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 battery and becomes fu82r1ghw ba-0awzij +ully charged. The battery is removed and a slab of dielectric that completely fills tha0hg wjzu18r ba2-wi+e 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 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 connecteddb+-9m( ac2wmq zl*l m to a 50-V battery and becomes fully charged. The battery is removed and a sla2cbqm-l wm*z+ a 9lm(db 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 inserted?

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