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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-fg: 3 0qoesq ysiujdho l:(2/z./ rut is 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 is argsu ryfzu ;2q;2j.b(

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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 insmm+et nq*)v9tlt g-/ :mk2i kbulated from their surroundings. Object A ha):-q2t9lt ie tgbmm+ *v/kknm s a net 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 the direction of the electric fieldzsp)esa-gi q2yxxz(y.fe +pchm8 s) 3tf.i+)

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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 opposilt4 g f2+0ep;7ndd* pa*zlvqpte 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 hollow conducting sphe9x4z+)gkm/obb( lp wx wn :sf-re. 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 potentia xn8 x(zq;mujfi4)( lnl difference. If the potential difference is changed to 2000 V, what will the new speed of the ball be?(fl8 zu) 4;jx mxnqin(

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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 swikiln snc 4w(a4z4. g-q6xk) ame 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 equipirlpgo:5 4h 8votential surface.g 845vorhl:ip

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surfasjijq6q 8wod(ny81jj p:67 3lzt1yp 2lze:m bce must 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 eq/ewc)h1 myicva+y9 7 ag/d4nvual to that on the electron as a result of moving ed yh9gmcv4wvnic/a + a/ 1y7)through 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 a unu vn 7jm6*1k t jiylz*-v lb.d;vb/-pxit 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 corresponfp95 ip( s)mcicv 1((y 4dqjneds 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 poz 3.i4r3n,whrt y6ook sitive point charge is 100 V. What is the absolute potential 4.0 m away from the same 3 y.o6rkow z,h4t3inr 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. zmo.9 ; 4jw sh uz*:vdnu)sy/beli1q00 m from a negative point charge is -100 V. What is the absolutejzslwn oq9 ;v duu0zs/4b.y)i:m1h* e potential 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 center of a square is 3.0 V when a charal 21d7xfrp33 v8y eoqge of +Q is located at one of the square's cornerxe273ql1 dyf3pra o8 vs. 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 sqde2u0flb7i, qe(5 sqtuare 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 squi qe(ls27dfueb ,5q t0are'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 o+ ;voxi9ja on*i nn)s:p, imw8f 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 isub 8za *(cdw/fo8b.tl 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 ever ;w8/-j47 hstjeanw341 lk 4+scjcdpvfsfxy4y respect except that one has twice th-nf+ 8vctwl344 ywjd a1sjh 7 x/fjkeps4;c4se 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 capacitance of C.p 6r.z tea 8y0c32onx5zc m k31n.gcbj If the area of the plates is doubled and the distance between the plates is halved, what is the new capaci1r nccyztn6pb.co5gax338e k2.mj0 ztance?

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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-plateca66f1srj yc81n- kv wa2+rum capacitor fully and then is removed. The plates are immediately pulled apart. (With the battery disconnected, the amount of charge on the plates remains constant.) What aujw- nramy6 c1+rfv1k6s 82chappens 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 tb x; /o:tjydm- 0ribcg7crn:2e;d)l p he plates of a given capacitor is weakened, the capacit)2j nli-:;7r /ex b :ptdcgb;oyrm0cdance 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 parallet6vqug cc (f).0w k*)trq-yu xl-plate capacitor are maintained with constant voltage by a battery as they are pulled apart. During this process, the amount of cwucqrqgfx)ku y)tv6 -(*. t0charge 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 parallelmtc8 w( 3pm)xpy wk9 /)qkj(zn-plate capacitor are maintained with constant voltage by a battery as they are pulled apa(k qcnxkwty( z/8m j3w)p )m9prt. 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 between the pl-jr2r1i; yiig ates of a cap; riji2ryg1-i acitor.
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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 t akjkke912 jkbs n9,3ohe plates of a capacitor. Wa3 skon 1jb9kk2k ,ej9hat 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 the q.wvy-u apt55i ne;g:plates of a capacitor holding a fixed ch55qt u inw:;g.va ep-yarge. 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 cagtg2e7)zc3 xz1eclms,pp6 k4z 9b (oonnected to a battery and becomes fully charged. The capacitor is then disconnected, and the separation between e 2gkxpzo,(ccaz1e76 gtzl)sp 9bm3 4the 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 of a capacitor holding a constant charge caus- n9i-3hndy ogc*z:oges the energy store n*ogyc-gzodih3-9:nd in 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 capacitor cak *r7hwi -vpva /z*:rkuses the energy stored in that cakp rhia k /*w:rz7-vv*pacitor 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 poiycbe/xja/ :m+zwzig .hl;3- jnt A to point B. What is the potential difference betweenz+cj/imb - g/h3w;azxe:.lyj 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 poi q1;v y:o kjan6zm9u4znt A, where the potential is -50 V, to point B, where the614 ukn:omaz j9v;zqy 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 through an electric poti6z.2xqv- (.qy tj6o u8y nuhrential difference of 500 V. Wha2(n-6hv quz6yxiq..r8 otuyj t 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 accele5;zk +tu6 bo* fxzw1hcrated through an electric potential difference of 500 V. z+5fukzoc x1th ;*wb 6 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 throu fq* jf4.p +fe+ceqo1pgh a potential difference of 1200 V. What speed+q p.1e cp ff*eofj+q4 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 movvqk*mau8:*xjk9 y/e1 ;tnzkling $8.5 \times 10^{18} \; electrons$?

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38#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A stationary electron isbxtj(iu 1u 3+;azz t;p accelerated through a potential difference of 500 V. Wu t j+3zzai( ;1;xptubhat is the 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 m0pug w1h4/5gmbl)g vr C. The object is accelerated from rest through a po5w0 v1u b4ggpglr/) hmtential 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 diffkl7* 70 q-ytis7t ormlerence between two parallel metal plates seps*7 y mi-l7rkt7q0tolarated by 1.0 mm. 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 be3 - 8ilf 7o s.ogcys+o-ul( h.qx,bga magnitude of 500 V/m, is directed parallel to the +x axis. If the p3,sselo-yb gh .-xi +l(o.7 bof8cguqotential 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 el aimgs2wfs((tv vt-2(ectric 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-gst 2vtmwv ia(f2s( ( 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 electrirkac lv 8axna+k3h*-b0 r*r)sc field of magnitude 3.0 V/m. What is the change ink8*+3* nr v)rrh-sca xka0alb 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, separantmi6a ad9l **ted 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 1.50 m from the positive plate, what is them ai*tal* 6nd9 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 connected to a 12-V battery. A2 ov(qkb+ d ,uzesd68nn electron released from rest at a location 0.10 m from the negative plate. When t2bkqszd(+vu6e ,n 8dohe 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.ia up+uj24(w a20 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 thpw2j uua+i a(4e 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 the east. If the ;fg2*;s7 j qh8f;a,qki psg br)ffw; vvoltage measured relative to ground at a gfigvsp ;f8jgb ,;qhkr2q7)a;* f;wsf iven 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 ofys8of*ia+zl/q3 jy)v 50 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 voltage at a point vylj+f8 s i/z)q*ay3o1.0 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 V, it will3og h2m30 uadecdid4x+v iv52 acquire a kinetic energy (in the absence of fru 5im dov 332ca24vg 0ddxh+eiiction) 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 distanc, *6 xdr,oleg j/q3nf0lhjvs(e 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 elr3b3y02-tgvpgjx k800fjt xg ectrical potential for the center of tj 2ty g3gp 0 3-kxx8g0jvbfrt0he 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,gbssjgjtp+ hw28 9d92)f(v jd 0). If the potential is taken 92bh gds)d vj +8sp wj2f9tjg(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 aeh4eggg5*7v/y9v hkx t (0, 0) and a -2.0-nC charge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is te* y54gkgh e hg79v/vxhe 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/uj7os sal* *z a -2.0-nC charge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the workzo*a l*u sj7s/ 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 +qf 9/hb f,iv7c1-gxav v are placed at the corners of a rectangle of sides a and b. -1v/ x9 igva,fvbf7chWhat 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. Cho.o0t )kg 9huwarges of +4.0 mC are placed in two diagonally opposite corners. In the other two corners are placed charges of +3.0 mC and -3.0 mC. What is the absolutwkho g9)u. o0te 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 +2e, ma , 1vjvxbqdpsm s;6)wg3h6ig+ss $6.64 \times 10^{-27} \; kg$) 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 7ju0c.arf6 sm to place three charges, each of 2.0 mC, at the corners of an equilateral triangle of side 2.c.s6a0j 7f mru0 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(xs wuwi+6 ej; is charged to 100 V?eww i;+u (xjs6

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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 ag) s ioo1 gg6tdawy062rea $0.50 \; m^{2}$ 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 fi rdkysdu/5k swo2,qv2x4 y(k3lled with air, and the plates are separated by 0.050 mm. If the capacitance is 17.3 pF, what is tv 22qro4kx(wuydk3 s/,5sdkyhe 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 plha50. q) fsvrjates 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 -)s+-l;c9fy v 9h7v rlftbnfp plate separation of 5.0 cm. If the potential difference betwr -l)b+ cyfn9-7ptv9h;flsfveen the plates 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 m;n1+hbarz53pc9( q )pxvzcnacross a 100-V battery. After the battery fully charges the capacitor, the capacitor is immersed in transformer oinrczz m c(1;hxb59+q p) a3pnvl (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 stor0 t+v)p znizzb8/vz0ked in thikz8v/0zzbt+z 0v np )e 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 capacitor. + v*se* -/tjv1 umfrpj What is the energy stored in the capacujp+1/m *jtr*-sv evfitor?

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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 o 2 /mfoa9.uu+a imcol13a62o,x nagizi0v* cg nto the plates of a capacitor when it is connected to a 12.0-V battery. How much work was done in charging this 0a i g gaf96*m+axncvi. m/ol 3 iuzc2a1oo2,ucapacitor?

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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 bsl-r .p,/v.v*y ylrdcharged 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 consists3- z m0tx-7 jr(bxqdst 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 ;eo py li1zib0 r0y*y.zjju69td15 udof 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 capacit3 dhx)3gr*ih d4df be(or 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 area oo q9f;x5k ijeez10z r/f $0.40 \; m^{2}$ 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 6;p7n5wlzca2n s igyo;z b 2o,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 u6tfiwe9 pl 12connected to a 50-V battery and becomes fully charged. The battery is removed and a slab of dielectric that completely fills the spacl ufe 1w26ip9te 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 conm9fryy2 r*nco:p/m/9ryv vj 6nected to a 50-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 across the capacitor's plates after the slab is insem:/myy9 jnrv 6f 9pr2/*ryvcorted?

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