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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: 游客未登录  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 vecq l7 18ukdtbub4 wbgn+hz 53)rtor?

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2#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  One joule per coulomb1zu2rwxe,k e h* rr5w: 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 fxiup4 lgwyt;ghr*(mav,9 :7 are insulated from their surroundings. Object A has a net charge of excess electrons. Objecp w9g :*gmly hiv7,rx 4a;ut(ft 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 electric fizp-jpxp0k 4qym v+n-- eld

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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 inq7;n0.j l *;mea owojn a direction 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 place;)w6kp+8 nsmnq8qq ls 9im)yvd on a 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 rest to a speed v by a wh:djh/ b79+itxbq 2 o500 V potential i9bhjt7 xbqhwd /:+o 2difference. 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 the sa94temdqv2 r +zme 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 As6od;(8 vfrmy5 .oac 0bvs +ew to point B along an equipotential surfac(vm vd+ . se;yfors a8w0o6b5ce.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surfacpywly0.ab3)c/.nps:cw 6x p* ff pni 4e 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+e fnnj/w;7khi)hz. v equal to that on the electron as a result of moving through a potential differee.h)zn;if kwh+n7/ jvnce 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 u70 be)g ;a2nrpx;gcnr 85pqetnit 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 corre.mp75voi:qmeuh k/b;*; sir hsponds 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 fromgu3gia qqa-6k9j :5 vp a positive point charge is 100 V. What is :3p-9qqg6kaja uiv5 g 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 a distance of 2.0 m fri3du r q(a.0o(+rrorpom a negative point charge is -100 V. rd p+ari.(3(0rq ou ro What 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 charge o ny62renv t- r,0k-szbf +Q is located at one of the square's corners. What is26ybr0zke r,tsn- n-v 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 square is 3.0tx7z7 u vk-/t-c4srcl V when a charge of +Q is located at one of the square's corners. What is the absolute potential at -rk-4 7 vctus7tl/xzcthe 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 th l)))gvjgk;1 zjer5*s :hnjxwo 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 w+so5/uavii9h4 9 f cpjw k8z(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 capacitorsi(mb.m ic+,(2d nwpio are identical in every respect except that one has,im(b( 2mo+ciwnpd i. twice the plate 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 capacitor has a capacitan :h xrb1umi0*;x+4 ;yovse ga+iv;ovbce of C. If the area of the plates is doubled and the diioh1am yi xbv bv:+;4gs0ur;+* v;xo estance 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 puhgzq y6:cb,( hb/w5warallel-plate capacitor fully and 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 as they are being separate5 uc6bqw,:wybhhz(g /d?

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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 weakenet -8 (6v2iuxfi1ok rdsd, the capacitance of that ca6irxt 1u8k (oi2ds v-fpacitor

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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 with constant voq,m0 0 xfibht.;kqtho s );*rpltage by a battery as they are pulled apart. During this process, the amount of chargp,i ;tbmfhq)0q s.*hkrto;0 xe 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 paralf,rzyzi2x;c fe,kti ia+0,c9w ct,g ig+ mq,1lel-plate capacitor are maintained with constant voltage by a battery as they are pulled apart. What happens to the strength of the electric field during this procg,efgq0a1r2 +,ytzzi c,iik t,9,cw; +xfmic ess?

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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 dielectril(qh9zb 8mrs 8ptvc32moa -3lc material between the plates of a capacitor82 (poart8zm mhlv 3qb39lcs- .
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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 )rf6ju8c3 los of a capacitor. What happens to the capacitocl8 s6rj)u3f ance?

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28#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A dielectric material sunb ml.x1vktw w9iz;3xo,8bs u+0mro1ch as paper is placed between the plates of a capacitor holding a fixed charge. + zx30m .19ws rlxbbim;,vkoou8 1w nt 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 and becomes fully c0y9gfdp4h b5 wharged. The capacitor is then disconnected, and the separation between 9bdfwh yg54p0the 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 causes the e8ck0m g2 odn(energy stord(g 2ne08kc moed 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 capac2/qdn /m:gx t rny8n q7s6odl6itor causes the energy stored in that capacito 6ln2qytq n dxrso8n://mgd 67r 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 tiqzq: vt5s .hid448y no point B. What is the potential difference between poinv hzqytdsni454:q i.8ts 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 t:uy b.y 99nkdphe potential is -50 V, to point B, where the potential is +50 V, pb 9y:n9.udky 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 pop pei pfa:5h w h94edrl).g,/xtential difference o,.dhppa9 wge h5rl x/):epif4f 500 V. What is the kinetic 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 acceleratedn a-qt+ y xwovcg (-/,)eql3ej through an electric potential difference of 500 V. egtj+-c qx- neovq/)a,3ylw( 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 througgyzozqr1; : a(v)t yy(h a potential difference of 1200 V. What speed d :o;)yyy1a z tvrzq((goes 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 inf+2hk sd 0fk3q 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 accelerateq zi8jq..vv, )6uuoctd through a potential difference of 500 V. What is the velocity of t tz.,8q6jc.)vqvoi u uhe 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 p7f ;ded8l7a2 uisc6tis accelerated from rest through a potential difference, and afterward the ball is moving at 2.0 m/s. Whatat6 7dflcs2 upe;d7i8 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 t,n(1(moo;alm 8g(ioma t*b rawo parallel metal plates separated by 1.0 mm. What is the elecg1(((o boammr lao8an*m ,t;itric 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, wit,x i n87qe)zhjh a magnitude of 500 V/m, is directed parallel to the +x axis. If the potential at x = 5.0 m injhzi8 e)x,7 qs 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 n/ t-+dt0zz frof 50 N/C directed toward the east. If the voltage measured relative to ground at a given point is 80 zr +t- fz/0ntdV, what is the 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 along the direction of an electric field of magnit2if4mp42 k2wp3,8:zu ctos n( uaphbi ude 3.0 V/m. What is the change in ki2wppnt fb4:2cako2h sp,(u u43mizi 8netic 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, separate2 9jtonw*g/s kl 7ias5d by 0.20 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 1.50 m from the positive plate, what is the potential difference between the inias n sowjl*5i2k/t 9g7tial 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, separatefum0,u.po fsi(2az ,pd by 0.20 m, are connected to a 12-V battery. An electron released from rest at a location 0.10 m from the negative plate. Wh uiuff ,p (o02.a,pszmen the electron arrives at a distance 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 connected to a 12-V battery. A+rdqz ,u3nhbn mgqbsb3of;8f .73vr *n electron released from rest at a location 0.10 m from the negative plate. When the electron arrives at ;ubbf g83h 3+q,mq3vrsd.bfzn*or n7a 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 towar pt5tj(k12fm 1g v4eswd the east. If the voltfg2t (sw15pv 1j4km etage 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 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 towardgg( 1jd,a fek q0kvvchd x6/ dl)k4a,c-2h (bt the east. If the voltage me)b1 le-k2/,jqa(gdfk(h 4 t agd6d,v 0c xvkhcasured relative to ground 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 +o;2a5ckh4hp a*k nkqacquire a kinetic energy (in the absence of frictin4;hk *hp+5akca qk2oon) 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 byt3yv it488 wp0a-g kat 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 ends of a meter stick. Find the e(djhnthvi, )/lectrical potential for the center of td)j/,hvn hi (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 c l- h6 6+cb3m z0g:mz.bnudibjharge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the electric potential at point (0,0+zum.cb inzm 6:d-gbbl h6j3 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 3o p( yiu- )svwoza3b:-2.0-nC charge is at (3.0 m, 0). If the potential is taken to be zero at infinity, wh v3uob) (iyw osz:p3-aat 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 a -2.0-nC charge is at (3.0 m, 0). If the sql t i23l4f* kwzaot/3s7q-xpotential is taken to be zero at infinity, what is the work required to bring a 1.0-n3f/q- wsq2ozl3al tsxi4t 7k*C 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 rectw0 uo8qcs+02bfc d0 )xewk*ddangle of sides a and b. What is the potential at the center ou 0 b02e)cods*f+d8w wqkxcd 0f 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 placed in two diagonalqi0b qzhuk l61 1 9t57iy;i :ouvzzihgwq:2u/ly opposite corners. In the other two corners are placed charges of +3.0 mC and -3.0 mC. What isq511zv:tg iz70; iyuhl /:9 ui ibzk huwqo26q 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 (chafqqb,s( tw 6a5rge +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 chargen-x3ru 7 faq3es, each of 2.0 mC, at the corners of an equilateral triangle na-33ueq r7fxof 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 whehr9t-x 4uup7e n it is charged to 100 V?7he4up-rt 9u x

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60#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capacitk*d ug-ti8mp./u8- kxmqd,pesb0ch0or 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 fillk dz5i0 efegn n0mz-;d+ee v6+ed with air, and the plates are separated by 0.050 mm. z0dneee;0e+kfnm z i gd+56 v- 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 capacitor has plates of xpf zol(byn5 95mxv9/woa :r2area $0.20 \; m^{2}$ 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 zz0 jsz qev wawlag.h9/m v+k,14-rc5tw j+*kplate separation of 5.0 cm. If the potential difference between the plates is 2000 V, with the top plate at the higher poten+. z 904*ta/+kcwa gkjz,m jv1 qvzwwhe 5-srltial, 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 nl7z obq.-2upx+4bg zacross a 100-V battery. After the battery fully charges the capacitor, the capacitor is imol2g x.q -74zbnbz+pumersed in transformer oil (dielectric constant = 4.5). How much additional 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 15 mF capacitor. How much energy is storeecm96: 9rtoi ld in the capacito9:6m9ol trice r?

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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 the cay4patj 1hswvnxdmmj9dbm;d0 )d :30 :pacitor?4y9xd da;)bp j0mmnd 0v: 1shwt:3djm

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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 iuu tpj,2 v1x7it is connected to ip, j7u v2ut1xa 12.0-V battery. 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 st 8grpq4 s0s9twk1ep)x.xs:b hqlgd3 d3ff )-o 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 5fmk5z1n/q)g* 4ouwe 6sqtsbconsists 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 consists of p+;g9azexg31v i6coib;5 smwalates 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 pla1s d,j 4wcby5e hv3we+tes 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 wit3es4b;s vm k7o- +jfyoh 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 capacith9( koo3uoex ff(w lb1 9c9-bvor 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 b n0x( 1oiigfh7pnmf9gm 5 ).cxecomes 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 capa7ximmpf) 1 9o.n(hng5x gci0fcitor 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 convmga9v,fi7o. t8 p8qyq0f j )znected 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 constjy 8q 0agf iv89o,tm.vpqf7)zant of 5.0, what is the voltage across the capacitor's plates after the slab is inserted?

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