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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 1* 51 bl.m,lxw sruhugis 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 coulomb bi y*gvc3j9j3y)ms 8 his 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 fa: b5knfi9wi4 rom their surroundings. Object A has a net charge of excess electrons. Object B is grounded. Which object is at a higher poten b5 9if4kaw:nitial?

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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 ihuu4g/ c7 vy(on the 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 oppd0(b56hkleh hz l;nwd (lz8 *vosite 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. fgw r,nd8**eo 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 acceleraevx 0ot j:6-ysp+7 qzmted from rest to a speed v by a 500 V potential difference. If the potential difference is changed to 2000 V, what will the v:q-x+ pmojezs0t 76ynew 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 qw.:4z *smig e9kwn)kare 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 c2w)- txsx0. mna0n jbB along an equipotential surface.n0bc2)wt-.nx mxs j0 a

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential suryo/c7qfp :mp (mztt* /face 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 8 km m bxbycn;r 996fomehb)bys:6+ c1carrying a charge equal to that on the electron as a result of movine yocm6b6xcyn9 9rbmfh ) bb1s:8k m;+g 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 vj dg)de-n5a7 unit 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 cor t6r1w( jxzry nnp/d:-responds 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 dlp9no gkn 2 au09gss*(istance of 2.0 m from a positive point charge is 100 V. What is the absolute poten9o*usg nk 9( 2ln0gspatial 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 f9q ue4s 4m2joii)l.mcrom a negative point charge is -100 V. Whame 2 qmiu.j 49o)sicl4t is the absolute 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 when a d*jm fwpl,(du /k;9 jw lb)jr;charge of +Q is located (mf, wl/rd;jp9kj d*uw;j bl)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 +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 a naoqf,:ox a7)t the center of a square is 3.0 V when a charge of +Q is located at one o:no7a ) ,xaofqf the 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 always cb2j s.df syk3.8* bzqe1y zo5ponsist 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 is 9mc3m5w pqh3g s 8k lgbd:p6*na

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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 )m:nbymvdowuy ,,4(t)/x ndn are identical in every respect except that one has twice the plamvdn m n,/utno y4d(y:))bw x,te area of 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 capacito+ .wa b5kij rgo;6l1cdr has a capacitance of C. If the area of the plates is doubled and the distance between the plates is halved, what is the new dr+ogj .cl51a; wk6ibcapacitance?

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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 sl;jq q5efics )1x, ;n-nwl q5and 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 as1;q w sqinxll5fs eq5)c;j- ,n 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 given capacitor is weaa kb *1cbxz95ykened, the capacitance of that1 za*k59ybxc b 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 capacitff0*b45xj ewho((yiy or are maintained with constant voltage by a battery f0fiwyyo5x(j4 ehb*( as 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 m82jx m,jmw ;vyaintained with constant voltage byy2,wx;jmmjv 8 a battery as they are pulled apart. 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 gss q oi cldu,v ,33)f0r.uz0ua dielectric material between the plates of a capa, ru,c 0) lduq33.igsf0 zosvucitor.
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27#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A dielectric material suo:vi/9(rhi u/ slj(z5b/l o3prw zaz,ch as paper is placed between the plates of a capacitor. What happens to the /h bu / oizz(5lzv(i/:jorl9 s,pawr3capacitance?

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28#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A dielectric material suc ka/m)c c - jtwm c8*ixul,m71l+qrbb:h as paper is placed between the plates of a capacitor + xi b,m u7l-)j:a1m*lbcqrk8 c/ctwm holding a fixed charge. 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 battery anfra0hh*;:ki0bo b-orj mxkb*f. ,/ic d becomes fully charged. The capacitor is then disconnected, and the separation between the plates is increased in such a way that no charge leaks off. The energy stored ih0r m*,a; offbo.ik/brck0-:jhbi*x n 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 cau5i aemjgf+f7qn:,nt ( xw:t,ises the energy stotf+ f,x m7iwtgeqn:(:n,ij 5a red 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 given capacitor causes therob ,ra up-(f+ energy stored in that capacitobf+ r a(,r-oupr 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 9gcx .;qeg9 a:3g.a/ekjouvhA to point B. What is the potentga.h q cge.v;a: uoe9jgk9x /3ial 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 potjab:kadb he14s h,,l3ential is -50 V, to point B, where the pdbb4 h,sa ,h13:ak lejotential 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 potentudj(x5 tiga:4 ial difference of 500 V. What is the kinetic energy of the :tiduxj 5g(a4proton?

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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 j.rjbgzwt 3r 3wtu45ik6 ) hz/through an electric potential difference of 50r6wj45 rtt) .ik3wzz 3j/gubh0 V. What 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 aw3qka,abvn n ;k ,6z:d potential difference of 1200 V. What speed does itq :adbk3z,6va;nknw, 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 m o -t20 uxbkavyb2e7etg; y8(koving $8.5 \times 10^{18} \; electrons$?

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38#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A stationary electron m/ke0j 3 vx+ 7bt/wtsnis accelerated through a potential difference of 500 V. What is the velocity of the ekw m3/bne0sxv/7t+j tlectron 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 rest .jod8d isz 7q4through a potential difference, andq 4dzi7.oj8sd 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 electrical potential difference between tw;f - (-h8sik, tpjrimcls mt-m tls5j0 ui.v4-o parallel metal plates separs (h tr l u4vli.tj;sfim-sj,-m5tm8 c- 0ip-kated 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 magnitb(yyk; tm xcs(wiz/3 blz2;*wude of 500 V/m, is directed parallel to the +x axis. If the potential at/w *yzmbsyt((iz3w ;kb;c l2x 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 w 64)us*w)pk1gude vpof 50 N/C directed toward the east. If the voltage measured relative to ground at a given point is 80 V, what is tw4upsp 6v)* )gdu1kwe he 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 p-2sb ya hs :14rwt(cualong the direction of an electric field of magnitude 3.0 V/m. What is the change in kinut-:4y(1wcssr bpa h 2etic 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 battery. An 7wg0vefqx4mb 7jdi ,3 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 difwg0 7jdf4qbm7e x, 3viference 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 battery. An * jmfl76ayy/v(p2zd o/rn*k n au(o(s electron released from rest at a location 0.10 m from the negative plate. When the electron arrives at a (ylyu(7d( *rafz*apov/jn/ o2k m6 sndistance 0.050 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 conne(v:;o8 k jq)pf9ox5/izgghjh6d9tpp o bc 56a cted to a 12-V battery. An electron released from rest at a location 0.10 m from the negative plaqf6 zx)thod9j 5j/(6iog;a 9:kcphppgv o8 b5te. 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/k8) v8w+xenz bC directed toward the east. If the voltage measured relative to k n8bxe+)wv z8ground 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 electric field of 50 N/C directed toward the east. If the0);78 ovagcn v(tdlc i vjy+a0 voltage measured relative to gac0 niv ;lvgy c v087(j)d+otaround at a given point 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 of 12 V, it will acquire a 1/p5r o;2do3vbm czxiioc;-m kinetic energy (in the ipz or o/oc 1;v;23 i-mcdbx5mabsence 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 distance u; * i 5vyk kh0g1wy/6mvgpjd6of $5.0 \times 10^{-10} \; m$ 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. Find the electrica6gx7rp5 wt.h el potential for the center of the mete h6t7rp.e 5xgwr 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-n7m*e4 yejjwe93egw cy b a(r9(C charge is at (3.0 m, 0). If the potential y47r (we jy9j* gbaeee3w c(m9is taken to be zero 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 -2.0-nC charl-b54hs9p,cbz2a/pu g .xs r hge is at (3.0 m, 0). If the potential is taken to be zerohuz9 a2rc.shx/bbsp5 l 4-,gp 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, t5r fz v9nesap.p) ,sq 5(b+kd0) and a -2.0-nC charge is at (3.0 m, 0). If the potential n qt+ 5kbpdsz)ra5s.,vep9(f 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 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 a rectgc r0u- k(g.mjangle of sides a and b. What is the potential at the center of the m 0gg- ru.k(cjrectangle 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 +4ptt 0xrw/i*l fasl 79ld2/x0.tppxz 26e efn7.0 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 potentiaxx2pltp9.7xnzedlsfe*0at0w7/ 6t lp/ fi2 rl 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 jis);2hqmwq4 +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 necessaryldao23t p.juqn/1j :wpqf, u; to place three charges, each of 2.0 mC, at the corners of an equilateral triangle of a t.l,pu1w ;d2fnpuqq j jo/3: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 chargee(,).m wf ckqr8v :0px xjpm:td to 100 V?r0,x :qfm)cjpp:e (x t.vm k8w

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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 hym40o(ei uy 6 :smngy2as 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 wit)b va4p5w6upcz 2-+p hk ebaf7h air, and the plates are separated by 0.050 mm. If the capacitance is 17.3 pF, 72 fzch v+)b-5k4pu a ea6pbwpwhat 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 of areaqimt3m81q h/a d9jgf, $0.20 \; m^{2}$ 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 separationob2/r*mhh7aktn n.b* of 5.0 cm. If the potential difference between the plates is 2hkb2m nbn*.*/taro7 h000 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 100-V battery. After the battery fu/ kw2df09ly w ,ktbzkxu0 wk9:lly charges the capacitor, the capacitor is immersed in transformer oil (dielectric constant = 4.5). How much additional charge flows from the battt90xkw b2 d,u0 lz ky9k/wf:wkery, 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 capack/shhn c6c1p5itor. How much energy is stored in 5p ksch/c1nh6the 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. Whasfw/s*0znze 7p+t*a k(7t omsoxwg()t is the energy stored in the capacito/o(sxnz)tf0o we7sw*a+* zspk7mt (gr?

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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 gxz +g ,91mnthonto the plates of a capacitor when it is connected to a 12.0-V battg,1x9 nmt+ ghzery. 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 stores 5grj k-phfuairw 86r kr+2u95 $2.0 \times 10^{-3} \; J$ 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 capacit3 scn aak.melcsfo;h r3s kvu339+v-6or 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 capacf,*uz(0ci) lt)b . xzgvih4blitor 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 consizw2eo-p3,w0t wygk 0yq lu 7t3sts 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 constructed wijujq + a6gj9 2,w0qlk8vm/k etth 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 sci5(ft,nt xs: w 6t+splate 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 be bpsb j(c9iq2sl1g5gan94y ;zcomes 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 capac c59 sbqgl4agpz;9s2yi1b(njitor 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 t-qv33d ehon)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 volo) 3ev-nhqt3 dtage across the capacitor's plates after the slab is inserted?

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