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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 is not a verio)m.pgre9 tw, )pn1 ctor?

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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- x+p kho9z0wl 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 surronlg)mi fkn5zu1 x-3n2)e3an7bh 0nc pundings. Object A has a netk3 i7fn)0l m-en nz1c xhn53)a2 bgnpu charge of excess electrons. 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 thep 3w,v-g)tq ba 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 directionpn;,.gy etd r)lsa;r z*))l 8 zz9zxcl 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 placed on a hqbi:+iozbbc + y*k d4*ollow 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 500 V -/upv 7ba.( z1oitvpul ,q(k.ah2 kyjpotential difference. If the potential difference is changed1u/ .v- 7,a(tzjpkbvak( uh2op iqyl. 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 , vnn,rigraoegw+s0l1,6b* l5vn2 ei 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 equipotent 5,0ezfua)yebb y6z7wial surface.ea7f zu e)yb0wy5,zb 6

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface mujr;eed rg -emucpy: 1d, j1;s:0ueb6wst 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 tkoqs qixr+em:f5 wr(b7 0am- 9o that on the electron as a result of moving throika rm0o -b7(+9eqwm q rs:fx5ugh 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 a2f.miuk)p 5wjq0v1jccxadx o 6k2: (n 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 correspo+pzk9 r we bk: 1)nup9s(os3wsnds 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 ljo96c ugyx ,-of 2.0 m from a positive point charge is 100 V. What 6jucl gx9,-oyis 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 a87e1.hew2wb 8gww jpwt a 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 poinwe 81.2wb 87pwgwwejht 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 ouj vo 01nd3e: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 when each of the other corners is also filled3d0evo j 1n:uo 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 ow et5q4*ori 0c xxi-x,f 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 cent4*q0 irwxxi,x5eot-c er 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 tx,*d/ aags;1xjnjwr, hat 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 iry302rfmtzv ; oo 0,nks 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 e.hvxekbz1,b 4 4u0kh(u4gt wfxcept that one has twice the plate areagb,b0u4hek h4u 1 v fz(xkw.t4 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 capacitance of C. If the area of the plat82fi+3jrpbku es is doubled and the distance between the plates is halve8rfiu+kj 32bp d, 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 repylj3/5x; vow) :wlml moved. The plates are immediately pol) :llm5/wy jw;xp3vulled 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 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 capacitl9 o(qjjm*u. oor is weakened, the capacitance of that o. 9lquj(j o*mcapacitor

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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 k+ )se )q8nr malu 0c+ztkd35rwith constant voltage by a battery an +aq)ckt83m05+ l e)rdszurks 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 paralt e)rif3+-2fsz ( tlyalel-plate capacitor are maintained with constant voltage by a battery as they are pulled aa2z3i+r) l-tf y(s etfpart. 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 betwedvjy: +r e:e;cc,f8pben the plates of a capacitopf +rj:v :b,cdece; 8yr.
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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 betwyt6o.a mmv+y*49wy kseen the plates of a capacitor. What happens to the moy.w amvs k+64y *9ytcapacitance?

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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 the plf+t2 h7np,nu fates of a capacitor holding a fixed charge. What happensf 2+nf,p7n uth 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 capacitos/m t-ju6p8 war is connected to a battery and becomes fully charged. The capacitor is then disconnected, and u6 wt/j8p-amsthe separation between the 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 capacit-+,0 -ils4)hx t mfi k:eflaykance of a capacitor holding a constant charge causes the energy stored in that capacit 4ft:lkm- -ki ly)0fihaxse ,+or 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 the entn h/,xm1)rn vergy stored in that capa /vxt,mhn)n1 rcitor 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 cu(. jij3-.cdyw4 eawzharge from point A to point B. What is the potential dif u-dczjeai(3y.4j w w.ference 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, whe mkzh1 e *lt6+cycfry(/g-5wvre the potential is -50 V, to point B, where the potential is +50 V,vg65lhe-(ytkw1*r+ym cz/f c 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 an9 .p fj.+nfho vj:yc-puqz r9m -9pni) electric potential difference of 500 V. What is.-+.)pnn 9f9rfz voym :j-cup ji9qph 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 f3da.dk gk7eto.9.ql accelerated through an electric potential difference o gl7 d odqe.kkt9.3.faf 500 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 oxk29e zwwc-nq9 qvrb85r 00wa potential difference of 1200 V. Whneqbw rxcow v0z02r5k9q9w8-at speed 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 m *m ccjr4w4ht8oving $8.5 \times 10^{18} \; electrons$?

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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 y9ickd7se p w-n..:8cef pki(of 500 V. What is the velocity of the electron a np:- kc 87sii. edwy.epkc9(ffterward?

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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 accelerc q6 w1xc8sy/yated from rest through a potential difference, and afterward the ball is mow6 8 c1syy/qcxving 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 4t4b c8/vhmguo parallel metal plates separated by 1.0 mmh/v4tm 8g 4buc. 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 ofp4fs1ko* *wuk: d+gfq 500 V/m, is directed parallel to the +x auqkd*fo w1g:4pfk +*s xis. If the potential 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 field of 50 N/C directed t: 0p3 ewbzawm1n x5p yvef5/,noward the east. If the voltage measurezynp1mwfa/e x5, b 3e5v:pn 0wd 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 of magnitude 3.0sk,.k4zbu+vdg2ol gps + i:(3xxe.jw j )i ai6 V/m. What is the change iv+o w3skipil ae.kgz+ i4j:s x.( b)x6,gj2 udn 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 0.20 m, are conneypkbgd)y8 +u 3cted 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 initial and3p8ugkb d yy)+ 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 f .,jxsst,3wrwd qqmi /35;lom, are connected to a 12-V battery. An electron released froof;/j dt35 3lri.,w qsqwmx,sm 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, separated by 0.20 lgyw1z1)eb i ,j9xpb3 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 electb91j)wl i1eyz3pbx, gron 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 fieldzto0ih.; uhu ) of 50 N/C directed toward the east. If the voltage measure zhthui;)0. uod 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 fiav*x2q(kbnbi83x 7oq4 in1mm.ik/h seld 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, wha/ikk 1mhvq bxona q 23i7*x.(i8smb4n t 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 mm7lkwazi38j 7 ,f7yknm9t(jpotential difference of 12 V, it will acquire a ki,w n 8(ztkyiakf93 j7m7 ljm7mnetic 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 distanog.cyr.x ji;a+bgv* 3* :ihj8tqc(p ece 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 meteya )t 4taiiql ;z,6e,ux 7ycg9a+jfo:r stick. Find the electrical potential for the c:z;aey 6iya+9tqg )f, 4jx,7iuocaltenter of 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,i8tl 7ueu 12yd 0) and a -2.0-nC charge is at (3.0 m, 0). If the potential is taken to be zero at id7yil8t 2e1uunfinity, 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 charge is at (3.0 m-w. a jpw8z-ip, 0). If the potential 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). p- 8awwp-zji?

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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)q7wcdzf*s55;i 9op ni and a -2.0-nC charge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the work required to bring a 1.0-nC charge from infinity t9;di 5qzp*o wn5cf si7o 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 corc1x4ds e* ao-cners of a rectangle of sides a and b. What is the potential at the cente14 xec-o*dcsa r 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 diaggijyctgw2tv:,wa9 q1lk d 712onally opposite corners. In the other two corners are placed charges of +3.0 mC and 1kqi2a gtw1dw: jtv y97g2cl ,-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 x m+0l)t gbfhj czr;q;fs*95ru)do bz: u3,yo+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 charged s-bh+d,5* u nxlh p3p5zkh8is, each of 2.0 mC, at the corner3,n hpxhs5u+l* -pd z85hbikds of an 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 of a 2.0-mF capacitor when it is charged to 1og a(huo7i ua(2-tpd 500 (u ghiuo7atd (52- aopV?

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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 plates of a/ kd vfqe;a,oo/r 81ayrea $0.50 \; m^{2}$ 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 w( sgfry8byti ,d/jk1p-p71uo ith air, and the plates are separated by 0.050 mm8ot7 jy1y1g r(-p s, bi/pdfku. 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 of73h08bs xxwp ejv1 m/f 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 th. ,tnv nrp1499nxyivs.lhg *q e potential difference between the plates is 2000 V, with the top plate at the higher potential, what is the electric fiel1,vvql *gin.4s9.nrtyx h9p n d 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 connea i2nhdolz co:687g x-cted across a 100-V battery. After the battery fully charges tgd2oa7o ih6c zx-l:8n he 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 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 stored ps37(d;pv nisin the ca;7nvpss(di3 p pacitor?

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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 capac jl70t+d ju:y1eceyyx 4 ex. w:v.ytu5itory .+j.vy7utx1wxe5 yj uc:y el0e4d: t?

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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 capaciya3a( o 0fljp)tor when it is connected to a 12.0-V p(a f0 y3laoj)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 so tmjk8 b+a9tpsh* ca909pvrosr 8;iq 4uhat 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 consists of plates sv+ cvb99xui 1of 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 consistxgz9*e: 41kpb +xj5 mlgdlt -gs 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 capacitoro(e(bjtpf z 8y)7 s8yy 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 constructed with plate aretz; *c: sn, f/q5qhlwga 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 b )i0l- vedf4(pkv3la 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 becomes fully charged. 6. j* hhdgq/ yft82wmc The battery is removed and a slab of dielectric that completely fills the space between the plates is ig hmwh2cyd/tfj 6*q.8nserted. 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 b.ygg 3u *uy-zrr+(h 9v pyh7ieecomes 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.(93y+-u u*ey rpigz.hhv7yrg0, what is the voltage across the capacitor's plates after the slab is inserted?

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