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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 followij ydkj dl;l+nv6ba6c9qn 8 i-9ng 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 coulomb93y..j6gi bffyn ovj5wi 3cm6 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 insula4/t/ bhdpme//sda av*ted from their surroundings. Object A has a net charge of excess electrons. O 4/da p ehs/avdm//*tbbject 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 direc. 97xgus pt 4lbi+t2sztion 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 direction opposite to the electric fielq(ls m r/ ,5qagdfkm2;d

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6#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Several electrons are pv i7)a,tlrb 5nlaced on 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 i vn7n adb78s;rs accelerated from rest to a speed v by a 500 V potential difference. sv nr7;n8b7ad If the potential difference 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 k ep. 724ri wc+chl4pdthe 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 ; vv7sm1,mybg along an equipotential surfacemvsvb1m7, y;g.

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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 bel e:u17uip m0ku5s9i v

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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 theef):)op8a q2y).g w l5vrbz-eu s y9fp electron as a result of moving throa) bl)pqvr.-5e geu9zf p8fo:ys)2 wyugh 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 u q3dcl(0u6f munit 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 t8ce*o6tg j daqh9/ fjt+,vo57 i 9xfaho

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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 distance8i87jb gy4xs.*ipncj of 2.0 m from a positive point charge is 100 V. What is the absolute potential 4.0 m away fro4xi*ip ny jj8bc. 8g7sm 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 z *kzi.6r1ihb d2n,r zh82ptm. afr-erq3ml5 at a distance of 2.0 m from a negative point charge is -100 V. What is the absolute potential 4.0 m away from tn .zpim2r32zil 1r8qrkaethf-b hz.*6,mrd5he 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 squa y9geg6mmn)(k bk +2mg5m9dd ore 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 center wdon ykm+mmgdgg9m2 k) (6e 5b9hen 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 ctn9 uc05w1omvharge of +Q is located at one of the square's corners. What is the absolutu oc19 vt5n0wme 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 lv7gkac*my3 mek3-(q 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 isnjf),xz7 wg ln 01wa+z 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 except that o. b6 aw166uh pxnlzr.5cagxh 7 pckr5(ne has twice the plate area of the other. If the smc65rguxrb 5x 6l1awp7 .pz.(nhchk6 a aller 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 cap1 5xxkue.9wt3nfr fo6acitance of C. If the area of the plates is doubled and the distance betweeet6fxkrf w 3ou9.n1x5n 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 idj/w :6f 7zie9t*xbow.tl:gp s removed. The plates are immediately 97tfe*6pwozw::tbig jx/ d l. 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 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 capacito n p6wr.h+y 1eswlf u0n5w+2cx9 y:hgbr is weakened, the capacitance 65s0 g2w.hlw+nx+ yper1hycubn :9wfof 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 maintained with constu.wsdfx ;a )3 d)1iq.x:mjulyant voltage by a battery as they are pulled apart. During this process, the amount of charge on the plates mdmy;l iu3d.ax1:sfu.qjx) w)ust

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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 consps sj ifv *(zk+1q+1sgtant voltage by a battery as they(fsj 11vi ++s*gpzkq s are pulled 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 adding a dielectric material be0 cifp(: mnlwv9 qsm(6;vjox6tween the plates of a capacim(lvpf; ox:j6wc i6v0sq (n9mtor.
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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 platesx chr(.bg.v5h of a capacitor. What haprxc. bg(hv5.hpens 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 pape,z)qf(nz( uyiv ppc 8*r is placed between the plates of a capacitor hon( p yu,*fc8z)zp qi(vlding a 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 to a batddl(y5y7 g6p43lhnp y5eg ho5gug* 1ttery and becomes fully charged. The capacitor is then disconnected, and the sp6yuelyh5g oytg np5ddl17h4 g *g53(eparation 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 of a capacitor hodkef /d y7tvv1:g2h4clding a constant charge causes the energy stored in that d: ydkfvg1c47/tv2 he 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 across1 vf7 55kep :n2sr,f ghs:mvao a given capacitor causes the energy stored in that ca5ho7p m vn1asvgr f,fke2:s:5 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 i(yhv+c dxe/7point A to point B. What is the potential differencd7+ v( heiyx/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, where the pojsljbvct 3 +78tential is -50 V, to jj8 7lv b+s3ctpoint 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 through an electric potentynikbn: 9x /h.xwc 68lial difference of 500 V. What is thx:y.w689cnhin lbk x /e 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 r*8r:ugpme. tge15 xih est, is accelerated through an electric potential difference of 500 V. e8x:rgg.iue pt1hm*5 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 differenc6.;0dmoa ncbj e of 1200 V. What speed does it acquibca;m.6o jn 0dre?

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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 moving 4 1.e60ex,yv-na.ajyz l;ykjicc nl . $8.5 \times 10^{18} \; electrons$?

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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 dizy-dqq6d k6s5/qmp ( 3b:h -r -omcugdfference of 500 V. What is the velocity o36q (6q-you- mcmqb-/ 5zdgrdpshd:kf 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 cha,.n/h x /2sd lhxvia0arge of 20 mC. The object is accelerated from rest through a potential difference, dxil2 ,sa.a/ hhn0xv/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 ele(x zga(g.y ;uhctrical potential difference between two parallel metal plates separatedzgau.(y;h(g x 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 a magnitude of 500 V/m,t6)b5fpp /cqidl1 b9;ts7uv b is directed parallel to the +x axis. If the potential at x = 5.0 m is 2500 V, what is the potential at l5u)/q 1 pi;s679ttb vfcdbbpx = 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 fhkzj94o-ab1 * ur ;qxvield 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 1.0 m directly west of that ;vq4 -* ob u1h9ajxzkrpoint?

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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 6l2m )o/xi ipmoyy:(/tnlb +n an electric field of magnitude 3.0 V/m. What is the change in kinetic enerxnn: tp i/l)+(/ 2mliyoy6b omgy 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, arexe4i.0dgjz + x. a:axr 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 the potential difference between the initial and final poin. giaejaxd+4 r:zx.x0ts?

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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. Awg b za)t:bc+*n electron released from rest at a location 0.10 m from the negative plate. When the electron arrives at a distance 0.050 m fzc:b*+w ) gabtrom 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, are connected to a 12-V battery. An e//kh kxk(xj0y r0zq sj8q 36 zry9bim.lectron released from rest at a location 0.10 m from the negative plate. When the e hb(rikxx q ykkjzjsmy0z39// q.80r6 lectron 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 the epamrd/ 7*tf3 ixrr d;xbn k.qjq :79m(ast. If the voltage measured relar .b(fnd k;p3d77 *r/ :qiq9x mrmtjaxtive 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 field of 50 N/C directed toward thej1.pwf vb62u-k8 udlp east. If the voltage measured relative to ground at a given point in the field is 80 V, what is the voltage a6dku.wpbu pvl1j -28f t 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 difz(0gi6jqm t r(;jlmo/ ference of 12 V, it will acquire a kinetic energy (in the absence of fric0 (r ;jioqm(t mjglz/6tion) 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;7rn1vv+ln 4a::d .d dw iri8a c4vekg*x9itae 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 meterulw))oe*l gw/ .pg/lg stick. Find the electrical potential fpo./)/l *gluw gwlg )eor 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 (:*q8h2zw06 p t ivikohr,b9ki0, 0) and a -2.0-nC charge is at (3.0 m, 0). If the potential is taken toh6ztr boiq89,kvi2 i0k *pw:h 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, 2oy 6mdh 2fgi)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 the electric potential energy of a 1.0-nC charge at point (g6)2o m2if ydh0, 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-r q32um,iyv; anC charge is at (3.0 m, 0). If the potential is taken to be z q m;v,ia32uyrero at infinity, what is the work 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 chargiv j.19fxdt(9z++eee: g gixdgsw.(s:+p qzf e +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 = i +txsfd fzzqi:j91.v (g9e(s.ge g we+:+ xpd2.0 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 i2ui:r: pr ,xru t/n38f0viqj.0 mC are placed in two diagonally opposite corners. In the other two corners are pl xiv0jr/iut8r : rpuq :2f,n3iaced 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 (chj2dm/ ) zq2gooarge +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 necessa3de5fo .9l1ys 8wotr 1w wkn*hry to place three charges, each of 2.0 mC, at the corners oo9lo35wwrfn *kh1w.dy8 s et1f 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 lap2b0pk-bvy onk1w1o3-3 mdthe plates of a 2.0-mF capacitor when it is charged to 100 V 1 kly-npwokvo1a-p32b0d m3b?

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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 h(whb3e tcx y- i,j+on1as plates 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 air, and the plates are separated s**;ql-ftj fk +:sef uby 0.050 mm. If the capacitance +*qkj t-f*l: ffes ;suis 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 tqf6 2ns:a)d uq;7x dfplates 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 potential d+ es 7 +rulukiyjom5.1ife 1sk7+ oi5uyum.j+lrference between 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 across a 100fbbf99v7x p2z -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,fvzbpxb2f 7 99 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 capac2ydd wdj 74gw7itor. How much energy is stored in the capacitor?d 74j7gdd yw2w

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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 g:02 0xgm6ox4o dr tx0riz5wmthe capacitor?i 5 rx4:60w 0trxxgm do2goz0m

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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 /:r p.sd cstk,(yjghw)1x iwk wi: q(x v72e+kwhen it is connected to a 12.0-V battery. How much work was done in charging this capacitor?2/+7w,q rgvk dc ky.skiwp xx1i:e(: ()twhsj

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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 .i qdvr r-a*w+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 consists of plkex3kzmy; h .: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 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 m+;w3 (p 1 tjd,rsugeuplates 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 of plates 8oh7:gnyk4p r 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 plarwwn 7i6atdzd+ t t9i + tj6:o5dd3r/yte 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 platkhtl9 gcna156e 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 co 80,mm7 j*r wfn:pxp.pmmtq(y nnected to a 50-V battery and becomes fully charged. The battery is removed*: mwrmq8ppm 7( fpn mtxj0y., 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 faap 0 jj)oon):w6 ;tfvy. vm(uully charged. The battery is removed and a slab of dielectric that completely fills the space between thj(p.a)6a);v :m jvwutf0nyoo e 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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