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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 tp5 qaux8nt15 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 ij)v3nx7 2u+ )y gg j4latkab4n)dg9gis 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 insij :rn7,i4:hx xvuvz.ulated from their surroundings. Object A has a net charge of excess electrons. Object B is grounded. Which object is at a higher potentiaxnhri:v4:j u ivx. ,z7l?

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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 thezm ( 7)fo ox )2gt)gmvs* oe3v5j6tqpo 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 opposizb z4+p*gv,g ite 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 okdc6enapsbh g 8yl)59tgw,(t1mn v ;7 n 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 acceleratg(o qujga,wvj+q cbc6v0424n ed from rest to a speed v by a 500 V potential difference. If the potential difference is changed to 2000 V, what will the new spee4 onj2v6c qv gawcbq+(, gj0u4d 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 ar nq.kiiv;qz7 w; aubs75 p;dvocw8 )r+o m:ts(e 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 along an equipotential sur*3ys z7hzxi 50usl8iy y pf8y-facexlu8-8yfz szy *p0 y53i7syih.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface mbon+ ;qgkkpb/3usp ( .ust 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 to te* *8gr q rhqlyygoc 49d1*yk8hat on the electron as a result of moving through a potential diffeoy8q*e**k 1r rygch4dy8g l q9rence 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 unrp;v hwkwpwr je1/oblr;873t 9bsy6o*6 i1wb it 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 correspoplle : a:05bkqn9 9tkqnds 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 distancd 3 a,0u lb+r7,neuvv b/h*amce of 2.0 m from a positive point charge is 100 V. What is the absolute potential 4.0 m away from the same pc /e l vb,b0u7,a3rmn*+huvadoint 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 j1 hsk eme;sw,xud93q09vce8 2.0 m from a negative point charge is -100 V. What is the absolute potentieesuv,m9wkj e0;qx s dc981h3al 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 c9.+r lo2t4i2ghy kvew m/xu32rrcvtfj-0 : efenter of a square is 3.0 V when a charge of +Q is located at o3t re0lvvm2:e ft4fyr .kh-9c2gxr +oiu/w2jne 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 at the center of a square is 3.0 V when a charge(vyf6q )*rkntf *b5gk of +Q is located at onek(rq *nbkvgft 6y)f* 5 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 ch6bz )r5g ez*c5o,fj igarges 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 a bwks +rt 752lto b(pqtak-v4/

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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 ev0e6 3ltwbyytuwc2, e 4ery respect except that one has twice the plate area of the other. Ift4 ey2w3b 0tu,e6cwly 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 the area of the plat d)vk6vd(fg3vaa7m1 kes is doubled a1kgvd( )vd 7avma6fk3 nd the distance 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 parallel-plate capacitor fully and then is remove(zz j-svm ,ei(d. The plates are immediately pulled apart. (With the battery disconnected, the amount of charge on the plates remains constant.) Wes(z (z -,mvjihat happens to the potential difference between 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 a given capany y ,ljn49m/ ueunl)6;8bp ekcitor is weakened, the capacitann ml,ej94ueyy ku)6/ npl;8bnce of 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 maintai t:t6gdh 3*si*b/2ibk23l zk lw6guhu ned with constant voltage by a battery as they are pulled apart. Dur3 b:u*glhl6*bit kg 2 d/shki t2u63zwing 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 casc+ q)1tw7wzz0i4) gxezix 8 tpacitor are maintained with constant voltage by a battery as they are pulled apart. What happens to the sc80x xz )z qwiewt4tz+7 i1)gstrength 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 materialp+ p;-vr ac vtax+n9c* between the plates of a capacito9vrx + ;pvac*c+pat n-r.
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27#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A dielectric material:dz+ s qlq1wf+ such as paper is placed between the plates of a capacitor. Wh:lzsq+f dw +1qat 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 between thc a; y;2oi aq4)hihah;e plates of a capacitor holding a2h)a;oia ;yh;aq 4ich 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 t 6bpkvi* a4+73 slhboho a battery and 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 enerbvs4 6ib3 *7a+kp ohhlgy 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 ch15r+2co neat r:4 7 -hpujikj mdzir;+arge causes the energy stored in t4r pnk+1d crhuoet :j7iz+5-iamr 2;jhat 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 capaci k+ ,bnn6wz*h*6py dpator causes the energy stored in that capacitor 6+* *ap ny,k pdw6hbnzto

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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 d ohni03wi1u:A to point B. What is the potential difference betweehn1u0ii3wdo: n 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 *5 ri b (o.wchno1qe+uA, where the potential is -50 V, to pq ci(h*o 5n obw1er+u.oint 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 thxm wfua03ye(6rough an electric potential difference of 500 V. What is the kinetic energy of the protonmw ef x6au03(y?

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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 ele11t *bb3qr/ :tgcc5c zedjd1qctric potential difference of 500 V. What is th 1cdcbe3:zj 1* rq/t1cbdqg5te 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 poten l nxc3):0kaugtial difference of 1200 V. What :0cn 3gaux )klspeed 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.oou7yk,- xkpe g376ng0 V do in 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 accelerated through a potential difference of p9np ox1jr(5a500 V. What is the veloca1xnp9p5(ro jity of 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 object is acceleratekcoij7ym; fwkf2cjl1(y m. 73d from rest through 3o i2jmcy l1yfwj. k;fm(ck77a potential 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 two paw x3fph7 +k7cx 0vwt8wq0ui q*rallel metal plates separated by 1.0 mm. What is the electricif +7*ckuw7 pqwxx03qt08hwv 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 direcwr o v.1vwmb-8p36lnv8u qd r/ted parallel to the +x axis. If the potential at x = 5.0 m is 2500 V, what is the potent ru1d v pobnw./ql8rw vv-8m36ial 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 directh:bagzl 1 5vx6ed toward the east. If the voltage measured relative to ground at a given point is 80 V, w5h 6l:vbgza x1hat 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 magf-dv0frqp3 cm0.70ka fnb) ocnitude 3.0 V/m. What is the change in kinetic energy ofnv30qd0f -fbc fmkc7ro.)pa0 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 bqz h;h8hql/-o oh 2q:hy 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, whzo;- h qh2/hq lo8h:hqat 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 bu24j9 gnd n-u 9oshaq6y 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 d2jdn -9sh au 9nq46oguistance 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 /5pi c4pl51 ,f0mt1ks rh)y anlckda,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 is the speed of the electr ykt0,/d fh,s1 kcp1cp ml5 a)5na4liron?

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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 the eastxx: )pjdq6 utr 0c20r58 chxsl+ 5mxss. 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 east of the poin0srdu+ 5xchrqt c)mlp68jx 2ss 0x:5xt?

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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 tfe88dqa 2v1blo,pj:u9wg, rohe 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 v2u dg8o8 l q:bw, foea,rp1j91.0 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 1.c6-( im,ehv8iyd xp g2 V, it will acquire a kinetic e6m8i e gyh,di-vx( .cpnergy (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 d s/mghk6a 4,p pv*ru-eistance 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 en l 8v7 b7qwlsuuz68/yvds of a meter stick. Find the electrical potential for the center of the meter sqz v7v8l / wu6s8yl7butick.

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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 cha /y 8dedwrp39xrge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the electric potential at point (0, 4.0 rd x3/ 9pw8dyem)?

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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 charge is at (3.0 m, 4e-k-ek-.gyz7cmo +lhicwx- 0). If the potential is taken to be zero at infinity, what is the electric potential energy of a 1.0-nC char4mg+h oezx ilk-ke-c-cy7. w- ge 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). Ieqfc*5oczy 3 7f the potential is taken to be zero at infinity, what is the work required to bring a 1.0-nC charge fromc 5qzof7 3*cye 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 3 6jvx zme:sz711fetpe*zlf,+q are placed at the corners of a rectangle of sides a and b. What is the potential at the center of the rectangle if q = 2.0 ex:7j vemz ,tsle* 31pfz16fzmC, 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 tws* 2 5a.jfj;9whb d pq/t,f0byb(h vtmo diagonally opposite corners. In the other two corners are placed charges of +3.0 m0 j p.( sjwaydbqt;b5/mfvt2hb h*,9fC 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 +6/eb ou5 ii/h /fvbdq.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 charges, each of 2.0 mC, at the coluz 5u5vl/6. x 6svdncrners of asuxn dluv6z6v l5.5/ cn equilateral triangle 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 ofx qntq/;w 4p-x a 2.0-mF capacitor when it is charged to 10/4txnqw ;-qxp0 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 plates4 1 jpfk,pww/n9 + hrtsyo3b1m 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 airr kb 0s(qs qi8unx/scrkc(k6 ,+8ln/t, and the plates are separated by 0.050 mm. If the capacitank,0nnqbs kic6 /q(8uk trs8c/ rl(s+xce 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 arez g7/y)m6 9ss up z-xumh0h/upa $0.20 \; m^{2}$ 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 the p0fmla* bcczm35(ymrq 6w 6yy. otential difference between the plates is 2000 V, with the top plate at the higher potential, what is the electric fielry 3wqzm *clmb6.y (65 fm0acyd 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. Aftera6n49qmu(byg mt y(tw;a2flpn e. 63r the battery fully charges the capacitor, ( m4;6 u2mg 9q6abfrtp.a3yn e nltwy(the capacitor 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 9 tbw/z+*0b/x adfnw q15 mF capacitor. How much energy is stored in the capanbdtfz + wq 9/w/xba0*citor?

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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 capacit3 rw6*qirwbp:9cv+a nor. What is the energy stored in the capaci +w39wq*v6: carbinrptor?

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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-0x9ybqwk oo 4 of a capacitor when it is connected to a 12.0-V battery. How much work was d q9y ow-0bk4xoone 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 stfs,0 act8:ye/l9qzw de,w .l eores $2.0 \times 10^{-3} \; J$ 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 o1647pz aqxzmf(0babg f 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 plcd lyl kw2je)7)r3wi +ates 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 of73l, h d,avawe 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 with plate bop+y t26ecij t0eb2 83j vhvo2 w0pg6area 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 cons7s 0s8,l)pmi o cy tg1h;xnh+ctructed 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 conneg sf4 vhqvf,v-ir)70wcted to a 50-V battery and becomes fully charged. The bat7hvgi , vfsrq)0w-4fvtery 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 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 fullrvl+t-.a fe8 o-.ojau p20vrty 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 voltage v0+ -f ot-.uap8.vejt rrol2 aacross the capacitor's plates after the slab is inserted?

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