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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 vectcd55i m5;cppb or?

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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 aw*n+lvxo kw0c g q-/-bif:pc1

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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 surrac-c+u+kybge 4 :)g3kidpw z7oundings. Object A has a net charge of excess electrons. Objed4k+cb3-p)gye7acw izg+ u:k ct 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 ofjs2 rscv05h3 l 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 n9er34 ws8ob bd1ew 7qthe 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 hollow conduct;ls*hqwres: (e,v ;hming 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 todk xqaq 0xqb)mm1*8 (n a speed v by a 500 V potential difference. If the potential difference is changed to 2000 V, what will the new spe bmm8 *q1q (dnkaqxx0)ed 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 refe p9g/:fvidmt o02r7d c ik1sd1rred 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 4j6p yoloq c);-qiyxbm (v 5+aqxr6j6along an equipotential surfac4 6l6corx ai5qo(jqvm) qxb+y yp6-j;e.

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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 sj:6uh.wr8 mr,u z/aqbe

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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 ejg yn r7w(r2m0lectron as a result of moving through a potential differencejr nr72 m0(ywg 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 ap9mn ,t./3gkcd2e cm h 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 corresponds v0ojk82)bis96 wkao hp+gvd/ 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 dic+jbdq 5k9xc/s atj; ,stance of 2.0 m from a positive point charge is 100 V.jabjdqc5x +/,9; kcst What 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 qpyh7pu69s2 va negative point charge is -100 V. What is the absolute potential 4.0 m away vp6uh2s pq97 yfrom 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 iszd l 3)+p lr.b8syu:pi 3.0 V when a charge of +Q is located at one of the square's corners. What is thrpzs dil)buly: .p83+e 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 c hij.rrq-o (x2e)w fb-harge of +Q is located at one of the square's corners. frb2qrhow(xe- i.) j- 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 c(:crff)j 6mns: szj h6onsist of two 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 asz:hy7 uh 1 i7es5re9l

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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 identicay bbb5eq b+(a+l in every respect except that one has twice the plate area of the other. If the smaller capacitor has capacitance C, the larger one 5bebbaq(b++y 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 o w.i(5cpae 4jfwyl(i6f the plates is doubcp 6.(efi(4i l5ajw wyled and 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 removed. Th6/w + zk:k jix;+pmhofe 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 separate+fixk : 6h +;pmzowk/jd?

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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 weak n-upxap* 8uk2ra6fu 3ened, the capacitance of that capacit*3nafuu-8u 2xp6kr paor

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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 vqp1c 8+mk,e//l-zjxqw9 wdev5m n,bt oltage by a battery as they are pulled apart. During this process, thqjqt-mvlm , wcp5b, dkn/z+w/ 918exe e 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 vx750on d q) vllofa/m8oltage by a battery as they are pullx/ovqo8 d7am0lf 5) nled apart. 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 addinsvw b rt5oe+4k i0yw,u/k tqvsn 60p0,g a dielectric material between the plates of a capacy w0 i0v6+ketrv,,kp5nq 4ub so /0swtitor.
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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 platejbqww7p)( )kas of a capacitor. What hap( 7wp)jbk qa)wpens 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 the plates of a capacifq ycxx.wit n42s.xs-cd+8j- tor holding x8+-y 2f -d4wt xcx.qsi.cj sna 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 conz0zelow (0/l b mogyb9k2/x5d0xysuc 6k;0r wnected to a battery and becomes fully charged. The capacitor is then disconnected, and the separation between the plates is increased in such 5/92u;0rc x ow 0glzykb/mokbsdz0(y lw6x 0ea 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 aslny 3fd2e 0 mehg) i v/ui 1vjpdvm,02pii+7; constant charge causes the energy stored hlvgine0 di /1pp3fmj20;uvvs7 yi,2em+i) din 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 capacitoilxv i kxi3-- b +,/ vw8ehf*ka;nr)oar causes the energy stored in that cap b* oia a hkk;)w/x3-xv-fln8eii+ vr,acitor 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 to point B. u6 szettij1lw;u n,() What is the potential differen,iw ujtn l1;seu(6tz)ce 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, wpf(up ( j11ebxy+q+ nshere the potential is -50 V, to point B, where the potential iqsepy1bjfp1(+x n+u (s +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, i-y2lyle6o ezgjh 2(j.s accelerated through an electric potential differenc l-j26g (eo2h z.jyeyle 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 accelerated throu-stwh3j8 /gojijhb-:d c5*hwu uql2 5gh an electric potential difference of 500 V. What is th jlh:h dq5 3u i-b2j-hwtg8/ujsw5* oce 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 fa;mjas nj/tw5m/0n b7blls through a potential difference of 1200 V. What speed doe/jsbn na0m /bwjm5t7 ;s 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 Vun)m:. c.l zu sln+;tv 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 electro hnbx8sc +dj0h u.l-3z*vqmlh2 b8 yg7+oau g0n is accelerated through a potential difference of 500 V. What is the velocity of the electron afterbhdh*g guo+ljv.3ncyxlzau0+2 s8 m8h0 7b-q ward?

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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 */wrjpz 9xh ts ;)hp(xof 20 mC. The object is accelerated from rest through a potential difference, and afterward the ball is moving at 2.0 m/s. What is the magnitude of the poteh)zwxt9px*/ (shrp; jntial 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 electutjz:5z 2y jx h0-8qytrical potential difference between two parallel metal plates separated by 1.0 mm. What is the electric field between the :yj0ju 5z-2qtty h 8xzplates?

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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,0 pkykyh6 o l 1q hbs.t1.c5akhg6f6u( with a magnitude of 500 V/m, is directed parallel to the +x axis. If the potential a6kh5c1o h(sy uakb.k6 ghfq0l.1 t6ypt 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 electrhuejo .ugh ok : 56dr*zf;-m78h*tzdxic 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 voltag57 zud dj-.oreghm6ho*x;k: uh f 8t*ze 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 elni0-de2xk +vcyxg)w9jc 1bx ,ectric field of magnitude 3.0 V/m. What is the change i2ex9y)c 0vgnxx cbdjw ,k 1+-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 zhyke q43w+mq1-jj5 gi,0 ux v0.20 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 thz hjvm+-ij,1xq ue3q4 5k0 ygwe 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, separate- c;urk+i+ lgfd 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 positiv lku-c;grfi++e 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 0ic .,31rrc+p ;corkw d.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 p+cr wrkc d3;cr1i.,ofrom 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 7a/0phr vmjp; 50 N/C directed toward the east. If the voltage measured relative to ground r07mvhp; a p/jat 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 toward th4fkegt k-k 57m5asx7s e east. If the voltage measured relative to ground at a given point in the field is 80 V, what is the voltage a47tm5s ka7sfgk x-k e5t 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 V58mc1 5v k x)xqzs;yun, it will acquire a kinetic energy (in the absence of friction) of8cxsk)u1; yz q5xvn5 m

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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 c4-ck 35;k yolgo2kty 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 thoq7f9i j. 6vf8:m y8kgj myc3ee ends of a meter stick. Find the electrical poten 68 yj: im3 f8ky7v.cjgefqo9mtial for the center 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, 0) and a -2.0-nC charge is at (3.0 m, 0). If the p m ;afy z5m-.ev-rl8i6z/uf iesv- :dootential is taken to be zero at infinity, what is the elyeefi65fol-r8.izsm :z d; / v-u-ma vectric 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 (tlf -1ozf79r:oh x 8my0, 0) and a -2.0-nC charge is at (3.0 m, 0). If the potential is taken to be zero at infinity, o f:t-homy79z8rx l1fwhat 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 5tnchx0)b6vm 6 p4bawfi; zn 3m, 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 to point (0, 4.0 m)zt;nh)0 wp x63 6ivbn4 acm5fb?

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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 d e3:glenxk*;7 ct, l-x srp9ythe corners of a rectangle of sides a and b. What is the pote c, nexd 9l-pe3*7k;rtx:l gsyntial 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 dquiy n jp7:5 )++juxnriagonally opposite corners. In the other two conj qu7nj)+: p5yi+ rxurners 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 (charg-ldvgi8x ,1 qce +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(g1qnj :u(uhl.0 mC, at the corners of an equilateral triangle of side 2.0 c: 1u(jhnlg (uqm?

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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 1yn(14pb)q:sytv a21sdedpf to 101a vy: pf )1y n14epsqbdd(st20 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 plate9uysokj m8.t: s 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 au2p ( n*c1e1fx0z9gq +khnligir, and the plates are separated by 0.050 mm. If the capacitance isph k1 * 0 egf+iqun(29xg1nzcl 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 pl 8vta4ooln2x:p,8/zwl f u c7yates 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 the poteni/hxl q e,dx,9tial difference between the plates is 2000 V, wihx/ 9,dixq,le th 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 conn.d) qhmb/dg-3s1k nugected 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 remained connecd.gqg/uh b km-)3s n1dted 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 ykqp :gl3vesuws6 8 ;4un4a4oa 15 mF capacitor. How much energy is stored in the c4ae:ok w;4nl 68 uy psuv43gsqapacitor?

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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 capacitor4m+8u.ebd0cg2xvse r, jd 7 br. What is the energy stored in the capacitodb2jueb0cr,.48 desm 7xg+ rvr?

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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 c6.luz49-mn (p if-i (jx /nzguczrw)iapacitor when it is connected to a 12.0-V battery. How m9/pw ji-4lmgz(- zi6)r . uzfcinn xu(uch 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 sol;r psr,8yg3 e 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 consists or5)s i i,o7idjf 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 m n)5k5g7xc ;bzr7bb gwb5 ydd8tg1 m: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 consislz6f;:0r g; cwso)hwsts 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 wit;+k o riz.,ffnh 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 construcbi(rf3u mjo,. ted 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 tify/p-w( gh8nz +z2- ghqpd,m o a 50-V battery and becomes fully charged. The battery is removed and(z,qdz8 gn +i--p wfmh2yhgp / 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 become)x2epcu(hi uzd.h/j 1 s fully charged. The battery is removed and a slab of dielec pud(h/)ie.j 2uz1hc xtric that completely fills the space between the plates is inserted. If the dielectric has a dielectric constant of 5.0, what is the voltage across the capacitor's plates after the slab is inserted?

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