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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 followit0r8+)bq puwur c0 q.pwdjlrg 7y +*-u( .harjng is not 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 coulomb0 syp71.e+ohxi nip hq/k:l 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 objects are insulated from their surroundings. Object A fp g(t/l,v+re:npfm +has a net charge of excess electrons. Object B is grounded.emn/t (glfpr++ pv, f: 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 thk mv,3:t8 fhdze 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 oppositen9- tre rqi0o6 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. Thenhig8 r9r*n hyxm8o 7*y

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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 res9 7*)esp in8c ynp:nwnt to a speed v by a 500 V potential difference. If the potential difference is changed to 2000 V, what will p:n7c n s*ynni)wp 89ethe 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/s(. zy0td s/ubfj q+s points 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 alonfjcsp80: m2 d+wfpe/ 9bvt/ qdg an equipotential surface.98v://pbpfce+mq djs fwdt2 0

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surha6-p t d7awujw(ju72face 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 carrying a charge equal tzj :g oo9s h,rkj22.jno that on the electron as a result ok .r ohj9njs2j ,ozg:2f 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 v;d( .9a-evrsy fr8vec ( (qhgunit 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 - a/c mz5p*b67of c30ptzioek 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 distanvb6m +q4b c yclh370duxl0) tnce of 2.0 m from a positive point charge is 100 V. What i4lybnhq )d+ xltc 0bc670um 3vs the absolute 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 awo - w7yg 7ufv*o5)ypysl *7ib distance of 2.0 m from a negative point charge is -100 V. What is the absolute potential 4.0 m away from the same ov w)w7 s*yubg5yo y-7if *pl7point 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 t .t -opki7;9g(tz-ljh ykf8 ozhe 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 wky z8(kz- tgo9i7 t hplo.jf-;hen 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 square is 3.0 V whedr 81-zco ib.bn 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 secob.r-i dozc b81nd
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 7py7 sbp 0/y h9nuie.jcharges 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 ibz w5w;tko*- es 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 o /c;rphg1mb-wne has twice the plate area of w1c;pmrbg- h/ 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 a capacitance of C. If thewy8 2kq 0unww3 area of the plates is doubled and the distance between the plates is halvnk3 wu8qwy02wed, 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 fully and then 0orsmr1qs81 m 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 are being srr18 q1mom0ss eparated?

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23#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  If the electric fiel/a.qzc +i2zc,ag j ot,d between the plates of a given capacitor is weakened, the capacitance ofqz2 ,z+.atc c/j,ig ao 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 maintained w7 bbdv -zx+qg9ith constant voltage by a battery as they are pulled apart.zvqgbb- 9d +x7 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 maintained wimdhc g1aw b5v03iiji- w-95yi th constant voltage by a battery as they are pulled apartjic5-mwad b0hwv-1 gi5i9y3 i. 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 between x l) fnit-jxk e ;bx;k0+rd)c)the plates of a capacitor. )fc0 xkre-ltnx)ijx+ ;) ;bkd
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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 ome9f t8h ,fuyj10*rtas paper is placed between the plates of a capacitor.*r1f0 ojhfty8, 9u tem What 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 betwee /(m9v.edfbm3q.6ko p1rrtjin the plates of a capacitor holding a fixed charge. Whj/1(6pt3odqr..mv fk i b 9rmeat 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 battery and becomes fully cjch(o fkca s 7y894w1(jdxqz(harged. The capacitor is then disconnected, and the separation between the plates is increased in such a way that no charge leaks off. The energy oxs1(4y(q9 78cwj(dz hfj kca 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 hold /bk;qc24amd)gtew d;ing a constant charge causes the energy stored inwd;/4 2)adkm c tgebq; 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 given capacitor cauhb3 ww/ vdy(/wses the energy stored in that c/wb wh v3/wdy(apacitor 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 m24 32tlc0zb g.jve+cer 4yfsh,w s;ydove 10 C of charge from point A to point B. What is2jf 2 e r yty4l.v,0c34cbwsszh;dge+ the potential 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, where the iu5p0 . un2uicqwv* 2tpotential is -50 V, to poin uiiutc2w .p*v0nqu52t 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 through an electric p, lcu2s j6gg5potential difference of 500 V. What is the kinetic energy of the proton6gcp,ul5 2sjg?

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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 restsp 0egrl t3r(c5nk 1/b, is accelerated through an electric potential difference of 500 V. What is the speed of the p3kgn0 r1 (lepcstr/5broton?

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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 am vqs,-rn+b h+ potential difference of 1200 V. What s-+h,+m srnvbqpeed does 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 movint0sug dv2jd-1g $8.5 \times 10^{18} \; electrons$?

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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 rum +i/mtg0)rd(m5 ;xogvd3 i a potential difference of 500 V. What is the velocity of the electron53i+m mt)/xdv 0(r;omugig d r 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 a0o7e(k s )xpgdccelerated from rest through a potential differes x7okpd 0)(gence, and afterward the ball is moving 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 127(h4b ,cpe,pzoqnm)k lxslelectrical potential difference between two parall14l7, eb sxn)(qocl2 hpzk,mpel metal plates separated 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 directebxb1 oucfptw939;f- 3u1meh ,hwc o8vjxl, :p d parallel to the +x axis. If the potentiab93 lmc9fhc-1hx3ut:v81p;efoxw p w,uo ,b jl 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 fieldce+7lfkssl 9inab0p2 e85mr . 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 mklab 2fi 7 0cnme 58sr.+p9sle 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 electrxm1mh e06ef rk-(4lyd.dk/ gaic field of magnitude 3.0 V/m. What is mkaeh 1gx4yrm6fe0(d kd./ l-the 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. f ra0fc0pb9nty +ni*u10 -gci20 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 arriveb0 i0gnitcu+p09 1 fan yrf*c-s 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 to a 12-V batterc,b cx255/rw lsw 3dml3br jz*y. 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 e/cswb 5rx*w2c3l3l,mjd5 r zblectron 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 batteri k9b-t7: fn*x hujeuj.g.ik2y. An electron released from rest at a location 0.1kni9gtu:.fbu -*2.j 7 ikxhj e0 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 electricr m( d w+xvsj-.ji4s8s51d lpm field of 50 N/C directed toward the east. If the voltage measured re sxd8 m-4sw+srplvid5jm.(1j lative 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 el )q 3vpny3o xpva+lo8pq3a) yq(2f9ng ectric field 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, what is the voltage at a point 1.0 m directly pa2pgy8 33vq)fx9a+y pl(oo)v3qnn q 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 xzmgz)f4z ms qg02 92ua potential difference of 12 V, it will acquire a kin s9 42qg)u2zgzfz0x mmetic 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 distancvl-a.l6n 11pyy 1mw b .cbv5lze 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 a73lh(i0nwe j xt the ends of a meter stick. Find the electrical potential for the center of the meter 3hjw( xi7en0l 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). Iuwyuf*zo6 lq -d20,aq0l-d qjf the potential is taken to be zero at infinity, what is the u6z 0- aqqd*-f lo2dyu 0ljqw,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 -2.0-nC charxle+nijic9wu,7ku 7 872t icage is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the el77cc ,klnixi9ijwu72 tua8 +eectric 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 charge is at (3.0 m, 0). If the pot)z+ sq03lgvtnvm1;ctential is taken to be zerotzscq0 vg3)v l1+mn ;t 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 placed at the corners of p*-yw jw*8tfqa: b4 wra rectangle of sides a and b. What is tbq-f 8 : **wwrtywap4jhe 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 +8s0.bachtue4zj 3r/apss(j,c m 3c c mC are placed in two diagonally opposite corners. In the other two corners are placed c 8c.b3jjpcash(u/c+3m0rea sz4t , csharges 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, masgbhn-7da 3psfm7m3 h 6laa2 ,is $6.64 \times 10^{-27} \; kg$) 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 ofq r-mi/zl 9b 3uw8kx +byp;i-q 2.0 mC, at the corners of an equilateral triangle y- ikr3w-i;/qbb9xuz8q p+ l mof 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 a .d9fxg2+eh 8cti2joon the plates of a 2.0-mF capacitor when it is charged to 10a9e tog+2c. dxjih f820 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 capacityyi/w l0 m;/3sii9ihpezd . 7gor 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 / x)svq00ywtoilled with air, and the plates are separated by 0.050 mm. If the capacitance is 17.3 pF,wtv0 xq)yo 0s/ 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 plates pfsttcciz +ku8,f825b (j3vsof 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 separ o2+(e)vsn ggvation of 5.0 cm. If the potential difference between the plates is 2000 V, with the top plate at the higher potential, what is the elect no+vg2 sve)(gric 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 batter92 beqxr+7tic y. 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 connected during the proce2+qrix7b9 c etss?

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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+ 84 u*vhqmwgv )lg8 i;0mj+ :qetlbcx a 15 mF capacitor. How much energy is stored in the capacit) +clq8v:x*4gitmhv lwbq8 ueg;jm+0or?

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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 inr 77mykzy1,- l6yocyx the capacitorc7kyzmyyry7 1x ,-ol6?

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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 capacitor when it is conne8+tkxsi)y l sbapmm;8lv x2, /cted to a 12.0-V battery. How much a+/lp288 i ,x;m)xkby sm lvstwork 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 charge99m1wcvju, j;jx8 dt vd 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 p l ct(ep) fm/p;/uzs7consists 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 capacitoyus )lx 5p2v u6f3wkv8 uwf*+mr 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 capacitopvrrja,v+wao yvj):-8 2jo/ cr 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 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.2 dp*(uvdbzyx env+3 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 capacitor is f w2l; p ua0f(t, 5xiek8zs;ia/ape;b:bef(b 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 ap14w ug e6gfk6 50-V battery and becomes fully charged. The battery is removed and a slab of dielectric that completely fillsg4ep6ufw16g k 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 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. .x i g2y3nsm4qml.1l6 j1qjiil gh,c :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 across the capacitor's plates after the slab is inserted , 1lg :m6qlnjqs234g xicl.iij.y hm1?

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