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习题练习：Physics Unit17: Electric Potential
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 作者: physics  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 vecto- tinv;kyw 7)e3/7aoq 9wbfuagmse2 7r?

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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 a .x4 wrw:fpoe0vs.rl;

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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 surrp5rthrg+ ryt*j efx r7:7s f)/oundings. Object A has a net charge of excess electr tsx/yj r5f)p+t :rr*fegh7r7 ons. 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 the directiskoseus ;ut:5 7zv np k5/92pion 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 lj3946qs v fe bgn vs+7e**iqjthe 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 h598a6bk -nhmiisk( dpo .4os gollow 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 rest5 * ,rvfomifi09i-a l4wyq2hf to a speed v by a 500 V potential difference. If the potential difference is changed to 2000 V, what will m* 504 yivwr , ifaofhf29liq-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 potential is referred to asncr:qnr*ey*y tol21a2h s4 2ikj 7uv,

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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 along an equipotent-lentx + y56 vxnx:gz*ial surface.*x+xye6 : lg nn-t5zvx

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface mu56q9fx4er omqgu jqp 78ot3h+i x 24ecst 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 parv gx: lywe5tek(o 56rqjpm4 .-: x,tulticle carrying a charge equal to that on the electron as a result of moving through a potential difference of one volt is ref:u tpm v r.l5x-,tqxk:(oey4 g 6wej5lerred 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 unit 1y yg xk2u/4rmof

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13#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  One electron-volt corres( jp0mbua6wzx9lfh )o4ofj;9ponds 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 distanc lf0bqpox+2 p;e of 2.0 m from a positive point charge is 100 V. Wqfpol2;0+p bx hat is 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 from a negative pointlyl) idwqrwb:gu n3f 4g1e ;pds+49n)fhqm( ) charge is -100 V. What is the absolute potential +qg;3pl4ef(h fgwb1dnnu) l)9:)4 iqyd s rmw4.0 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 che;- zk (n7o1jjskyd .parge of +Q is located at one of the square's corners. What is the absolute potential at the squay1jn d; .pkok (z-es7jre'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 3.0 V wy1px*ia gb59ha**vy,e8 h wt+tt*j czhen a charge of +Q is located at otg wyt5a*v* p8bt* h1za9j ,*+chexyine of 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 consist of two charges tha6wjwj wj6;o .g so*5fut 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 amn5 01 xw;;5jfso61frdq cmew5u+ nt v

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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 rehtj rh8u)q4;(dy+zbospect except that one has twice the qbo;+rtd)y( u hj4hz8 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 capaci xz*kv5 1l4 wqxbc.qs+tance of C. If the area of the plates is doubled and the distance between the plates is halved, what is txb z+4* kl.q1xqs vc5whe 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 :clsf3bl8j qoay;- x7is 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- x yj3a8lqflo 7;c:sb 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 plates of eg5p gjy6 i+b*91is xwa given capacitor is weakened, the capacitance of that capacito*wii1 e+pgx5s bjg9 y6r

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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 para -ijl.bm.3h ahllel-plate capacitor are maintained with constant voltage by a battery as they are pulled apart. During this process, the amountl h-.jm.i a3hb 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 m(zy9-f mwh2fare maintained with constant voltage by a battery as they are pulled apart. What happens zfw9m(f2m -yh 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 thilhps3 up0j it :gq2vd9s*q g pkzr;-;.f(o3re plates of a capacitotk; 30q*rzsj(pqu; :3g l iir-dsg 2vhfp9.opr.
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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 ca o d-i00fp)ze+ee,;lckekomu/7v g2) 6a dt ybpacitor. What happens to the capacitanceiydeobt/ 6);o dkece)pg lvfm 2u00k -+z7ea,?

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28#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A dielectric materiaw2 6 yw7,llvsql such as paper is placed between the plates of a capacitor holding a fix l7svwq, 2lwy6ed 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 and becomes fully charged.8ps.gwbqh;m::m7 nmo 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 in this campwbgmq 7:h s8;mn: .opacitor 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 causesv( x runh3vu-) the energy stored in that capacxu h(n)rv- 3vuitor 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 capacito: l4bwa2tn5 zgwo qnay2 k5j4,r causes the energy stored in that capa wknnq5 j24ogbzw ta4yl :a2,5citor 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 oly x1f9eard1: ,2a wymf charge from point A to point B. What is th y, 9dem:yxrw 1faa1l2e 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 ) c6q1kapip zo./tv, zan electron from point A, where the potential is -50 Vcz kpt.6,/) aip1 vzqo, 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 accelerat9-prqajny* ( l0yoa g:ed through an electric potential difference of 500 V. What is the kinetic energy of the protoag r0yl(q:ajo-n9y p*n?

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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 accel1l,kyz ;,ectk erated through an electric potential difference of 500 Vcykt ;e1z,k,l . 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 a p 6z5;ei sfrzkr,s* nz,jb// gzotential difference of 1200 V. What speed does n5rrzzz/ gz*, k ejs6;bi/s f,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 l h-1i*9ismsnmoving $8.5 \times 10^{18} \; electrons$?

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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 differewg2w0gp .,m/j*n flcxnce of 500 V. What is the velocity of the electron afterwar* l0p,mwngf/.g2 wcjxd?

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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 restbyarxe./z3rqsa 5h 63g4d/g bf7fo, n through a poyz/b ,qg67o erfd3/h 5x43.nar agbf stential difference, 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 electrical potential difference between tw4:nyz,ucy0net )pamn y8+,jh o parallel metal plates separated by 1.0 mm.h yn u,:)+n0tyn4p8cyjem,az 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 magnitu-xspx a; w9cd6de of 500 V/m, is directed parallel to the +x axis. If the potential at x = 5.0 m is 2500 V, what is the po-adwxpx c69 s;tential 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. Ify .. utls3it-ggu2jv7x,h ;dhmw4t rl6ja t.3 the voltag-tthu v.t djlw ;i3rt gm,gu27haj4 3x s..6yle 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 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 ofjfe 2 1jw/qr4j magnitude 3.0 1 qwjjre/24 fjV/m. What is 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. 82/ ;eairnpymm.v 5ps20 m, are connected to a 12-V battery. An electron released from rest at a location 0.10 m from the negative vn;m/.is5e ym8a2 prpplate. When the electron 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 connected8w kg,+ 3bangu to a 12-V battery. An electron releasenaw gg8,3 kub+d 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 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, separaru r6:vroi y,7vm(i6zted 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 0.050 m from the positive plate, what i6rrv(6 yioi:vmzr,u7 s 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 z (n x0b1*xwz+ q1m 7ihhsobu3the east. If the voltage measured relative to ground at a give 3x m(hb0buh7+osnxz qi 1zw1*n 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 5l: vt,j avgy)d;x 8lb40 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 va)xlv8,d;:ly 4bj tgvoltage 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 522tylhr9kqcfky c* z (ts.x5difference of 12 V, it will acquire a ki9s5y2 fxztly t(* hk5qrk cc.2netic 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 gz :fcb8ho, jgq:69;6r hqmyb 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 electhmu,6 sy n9ja:rical potential for the center ofu,:j69 nymsha 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 monbbcfvv2ol1 f vr.,w2sz tv8im/7,5, 0). If the potential is taken to be zero at infinity, what is the electric potential at pt27zowbv5,, nm 1obvf.fl 2/crv ivs8oint (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,e n* fs*ew7q;znq*n 9-6hew bm 2u.mws 0) and a -2.0-nC charge is at (3.0 m, 0). If the potee.e*wns wh 9q*mu6 n-2;ez7fwnbm*qs ntial 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 a -2.0-nC charge is pn w;z2qqrk9 3at (3.0 m, 0). If the potential is taken to be zero at infinity, what is ;w2zqk3pr9qn 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 +8 9eetz tna;5gq are placed at the corners of a rectangle of sides a and b. ent;t59 egz a8 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. Charges of +4.0 mC are placed in two diagoj 3 y+abb c0hshb6h*7+s fwyx6nally opposite corners. In the other two corners are placed charges of +3.0 mC and - 6j6f7y bh+ bxw+y*0sa3cbhsh 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 +2d n6zv7d q pw(nw+53ize, 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 pla;q (ci.pz6)e 7nl mmvace three charges, each of 2.0 mC, at the corners of an equilateral triama7l; v eqmn.c)p(iz6ngle of 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 w;ijqcahqz87i 0no3 / when it is charged to 100z nii;w3/ hjo87cq a0q 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 capacitor has tmh5b)4 lats-*urv;6/e hv8lb/ mmtdplates 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 plate/zt a ju3619vjjjjjw5s are separated by 0.050 mm. If t z 6j5w1a vtju/jjj3j9he 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 habo+j eb6* c9xcs 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 plate separation of 5.0 cm. If thet ;p5(ui a.ylu potential difference between the plate;u tp ul(5.ayis is 2000 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 batt rb0,m 3/hxnmty, d6oeery. After the battery fully charges the capacitor, the c/ xndmryb6o e3,h t,0mapacitor is immersed 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 muchhc :s9cu s5,mz energy is stored in thus:,cmh9 5sz ce 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 c ox5+v*gu 5sodapacitor. What is the energy stored in the capacitu *d5o o+xgsv5or?

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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 0i/s9o y;9nmmy12psctz( sz nplates of a capacitor when it is connected to a 12.0-V battery. How much work was done in charging this capacitoy (on9n9 sc;/ p1sit02 zysmzmr?

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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 isnky k vd; egt*9:u05y8wefvq-ihsy./ charged 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 5 0g 8ku1vthcgconsists 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 plates of a1 +mjfzsb n*p3rea $1.5 \times 10^{-4} \; m^{2}$ 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 pla og3)n4uh7a )1ngzlmi 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 *v75zx6n nolj is 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 constructed with plate area of do5qfe6v 7 4 x-pwzzg*$0.40 \; m^{2}$ 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 fully chargyk-yku l92v/ i+b d4 r*ib+drwed. The battery is removed and a slab of dielectric that completely fills the space between the plates is inserted. If the dielectric hbwi- 2v4dydrkbiy+l r/9k +* uas 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 fulh2g kdl:ka6g1ly 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 dielectrghk 6 g1ak:l2dic constant of 5.0, what is the voltage across the capacitor's plates after the slab is inserted?

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