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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 466 2o .u*scx*8aurpqp7qpu ad s)wap 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 is .z( kp)amflj1 biz :6z k-/dara

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3#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two identical aluminum noj*z;lu qqr 6.*0 ,o:widw knobjects are insulated from their surroundings. Object A has a net charge of excess electrons. Object B is grounded. Which object is at a higher poteqw:06nnj ;io, * orukzq.dwl*ntial?

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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 otmt48c p7 +pcef 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 the electric fieldq4-s mu c1 tzt60fakl *(dby)g

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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 sphhr fgt5ur2(k ;ere. 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 acceleradqb:g/f m1 ,*cjgmc9flkk;wr we3 +)z ted from rest to a speed v by a 500 V potential difference. If the potential diffel/jmc,gwk*gqe+b: c )mdw3f ;z k 1rf9rence 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 so.8 ;2w-6zgebllj8k jvc.n tmame 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 r8p6 ;93 iz) 8kyxmfa+c qk6ks cv2jkzto point B along an equipotential surfac68yaqj k9z2kk 3r6 k) cmiszc;pv+f8xe.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface must belhd2gm. (wtk 6

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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 that on the elec9+ ige 4qd4.-mibp) kjsow04xytfl 5 wtron as a result of moving through a potential difference of one volt is sk5.4i4 e0y-gpx9 d) mwtwqbilo+jf4 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 h2k*xdospf(t2u gj: k- .ii 6yunit 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 corresponkg m* xz5*ayz3ds 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 from a positive point charge ist el4e+pl tl .8c9i 1vkjd8t7q 100 V. What is the absolute potential 4.0 m away from the same poin1jed 4+7li8k ct tvepl 9.tql8t 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 negat p zikwe-f*s,)bm /c+rbtg6 n-z8bi+p ive point charge is -100 V. What is the absolute potential 4.0 m aw+ sb/8r ) 6,-fbpiwziezm-kn +tgpbc*ay 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 -x (cn)wsbc*y6bw8uca charge of +Q is located at one of the squwnxcbcsby)6u *wc- 8(are'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 cv hptnrc;4v6d .fr5 7fenter of a square is 3.0 V when a charge of +Q is located at one of the squac7h;rdv6vn ft4r fp .5re'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 that nm0z li+ ueb5v)x 1fc1are

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19#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  One coulomb per voltj 9(qro b-5l p-oa,y t 7cd;mrd:2ffpm is 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 identicad qny6+z k i7y/a(c/vnl in every respect except that one has twice the plate area of the other. If the smaller capacitor has capacitance C, the larger one has capacitance q/c ivdknan7yz+ y6/(

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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 capacitqs xo vy:-0w1uance of C. If the area of the plates is doubled and the distance between thwsy0x-q1uov :e 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 fullq8hu8hug2 n hsggt:/(3ej1 uy y and then is removed. The plates are immediately pulled apart. (With the battery disconnected, the amount of charge on the plates remains constant.) Wg88g :g(1nts/3h q jh2euuhuyhat 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 betweenxc+xe (1fy s)tpgac2, the plates of a given capacitor is weakened, the capacitance of that capacitc) y( gaxf,e2p+sx 1tcor

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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 qxe 02vg/e/intb f3+;(ovikiare maintained with constant voltage by a battery af b /t;iqivgi(n voxe032+k/e s 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 maintained with constant voltage b4.pupgzt)h :ast+2t ;t tnx(zal/ u.dy a battery as they are pulled apart. What happens to the stre+gupshza(dazp .4tunt t. t/2) t:lx ;ngth 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 dielecth;a;laplwt3j ;+ rswg : :vof:ric material between the plates of a capacitw+ vw: :h:l;jls3apotf;g a ;ror.
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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,a 0wgib 70 lvdd19yif the plates of a capacitor. Wwdvi0i9 ,ayf lb01dg 7hat 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 euq;w ,ila.0h paper is placed between the plates of a capacitor holding a fixed charge. What happens to the electric field betweenq0 e, uah.iw;l 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 gz4 hw22z+u ol ua+f3cbattery and becomes fully charged. The capacitor is the32 +cuu+zhfla o4 gwz2n disconnected, and the 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 capacitance on(kyi -6io *upf a capacitor holding a constant charge causes the energy stored in nyo *-k(pui6ithat 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 the energy stored in) seg; xecy7z (np5h4p that capacitor t;pgce ) 5hz7(yspx4eno

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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 10ed5g0 ;q 0 cv8ecyxe3c C of charge from point A to point B. What is theyedqc 0c0;8 x5v3c ege 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 an electr;i/ )vi ;yfpbnon from point A, where the potential is -50 V, to point B, where the pvby /i;ip) nf;otential 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 :a+gbe rk*nru zr k013accelerated through an electric potential differeenbz31akukr + r*g0: rnce of 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 ap ua4bjl* 0zaa)*d/k7eet ,mnc db3as- g6x8mccelerated through an electric potential difference of 500 Vz 7lscuaadbe*jg/4,p6 )3*me kx0 ad8mn-atb . 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 potential difference of 1200 V. 3wpz z 02kh)rz8tuxh1 Wh2w8z)zut3zx hrhk1p0 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 dmf)vw;gm+4a6c p7c u fo 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-sg *ww e;w/jq potential difference of 500 V. What is t/j-e*swqw wg; he velocity 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 acs9ed9 jbg )xjcp)q:s:celerated from rest through a potential diffe9sd)): ej xq:csb9jgprence, 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 eyu+ y;tg .rf6slectrical potential difference between two parallel metal plates separated by 1.0 mm. What is the electric field bet6rsy .f ;gtyu+ween 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 magn o nu c0nb:;/dqa8we46-hbivkitude of 500 V/m, is directed parallel to the +x axis. If the potential at x = 5.0 m is 2500dvk80e; hbcnau-:b4niw/o 6 q 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 electriw z9c*nq 5mt8bc field of 50 N/C directed toward the east. If the voltage measured relative to ground at a given point is 80 V, what is the voltage at a point 1.0z nm t5q9bc*w8 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 lcd7fonf6,+z ba/ t9pmagnitude 3.0 n/fc7ad69blzo, pf t+V/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 0.20 m, are connected to a p9fgasow igv98kj5 ,;0lmq w/12-V battery. An electron released from re0 vf/8 qigsg9,m;5 aklwjowp9st 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 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,sblmwkqvb8,oe 4i4 5,mp i, .y 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 fro48iq,,.b5 yp ob,kvmml sie4 wm 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, v (+4* svllm4kxjk.gn are connected to a 12-V battery. An electron released from rest at a locatiglvnkm4( j4 .ks*lvx+on 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 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 th y3:2s0;sht ffz 6ewvde east. If the voltage measured relative to ground at a given point in the field is 80 V, what is the voltage at a poinfhdtf s6wvezs3: ;0y 2t 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 a:x99; h l9nsp/ l(w6ocdptwc. If the voltage measured relative to ground at a given point in the field is 80 V, what is the vp:sc/ ph9lnl o(cx aw96;dt w9oltage 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 diff 3girnm rf;um*mks/ws8;)a h:erence of 12 V, it will acquire a kinetic energy (in the absence of fmw:gmkr )m;i*3/ saf8us rh; nriction) 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 of)b njh f0ocbf;os6b:2 $5.0 \times 10^{-10} \; m$ 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 st;b7qh ct :sy7eick. Find the electrical potential for the center of the meter stick.yb 7: h7tecqs;

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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 zht*gval5u :jh;(q8t8 mr c/tis at (3.0 m, 0). If the potentialqmv c t5tl8u;*8j gz( /hrth:a is 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 charge is at (3.0 m,a; k7jijkpmz3f3lm 5 7 0). If the potential is taken to be zero at infinity, what is the electric potential energy of a 1.0-jfl7pk mz j;a57i m3k3nC 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 0 az mbk1d:.*xp0rl sp-2.0-nC charge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the work requir1sd pzmp0k: lr*b 0.axed 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 rectangle gsh*qo*,q 8gqof sides a and b. What is the potential at the center of thhgg,o* sqqq*8e 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. Cz z6ke;/ywylz4mpz+7 harges of +4.0 mC are placed in two diagonally oppositelz4;6ym zy+ zk epw7/z corners. In the other two corners are placed charges of +3.0 mC 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 (cr.dvqu np07l2harge +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 necessar+cukj-o jl) ;oxh 2he8f4 /udey to place three charges, each of 2.0 mC, at the corners of an equilateral triangle of side 2.0jh8k/ou +oe; ej 2lxh c-4ud)f 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 platcbd os)jag;( ylv f1++es of a 2.0-mF capacitor when it is charged to 100vjb;)+s+aogcld 1(f y 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 plates of ft:3a rfzd:*zlno-c8 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 airs :z6(3cl4e rdmh qa n7*wlk6b, and the plates are separated by 0.0lhaq szlw6 4:*dnrke3m( 76cb50 mm. 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 aufh9, ,4a4uv r wpkwz,rea $0.20 \; m^{2}$ 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. z. q3ulzco(z :If the potential difference between the plates is .u( zqlz3:cz o2000 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 capacito/b.0euxhfx 7l0bzk3 br is connected across a 100-V battery. After the battery fully charges the capacitor, the capacitor is immersed in transformer oil (dielectric constant = 4.5). How much additional charge flows from the battery, which remainebkxz ub3 7.fbx e/h00ld 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 w8piw2*) wp*f 7nnt ptstored in the capacitorfw pw*87tt2w n)pn ip*?

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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 energf-f k hoz4mifre);41ozqao ;/y stored in the capacitzf qro/eo; hz-)ik14mo;4 affor?

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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 gtt+4a;z03lcu3n koe it is connected to a 12.0-V battery. How mucak4t3;ucz3 0etn gl o+h 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 st.dw1b4w t, v wge)vs/+tnw8qfores $2.0 \times 10^{-3} \; J$ 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 j2xym7kf;ap rl3b5 ;ll2e xs,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 capacitor consists of plates of * tkmj6e7dfa3area $1.5 \times 10^{-4} \; m^{2}$ 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 plf;wkjn 3fz0-3ch 3vwrates 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 constructjhy-4vq flnde e;am7m4)80oled 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 3 0gz oqiw)62 rp yv*r6i5die-bxaq* h76xrjh 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 g:nf.cruwn vw1b 9(n+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+v wnu.r9 cbngf:n 1(w.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 5y+ yjm-n6 ol-4mg;a1(lv1rjcvh omy 80-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 constant of 5.0, what is the voltage ac m -g(j8v 1oylo+ajrn y6clmvy;m-h14ross the capacitor's plates after the slab is inserted?

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