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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 isszt b::o z.sk)or qs+k1m y5r0 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 i,savt fivnsa*rj(zi,i*3c 7a/w7w3qs 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 weu;uhd q e6 ,,h7v8x)bc)ymo from their surroundings. Object A has a net charge of excess electrons. Object B is grounded. Which object is at a higher potentia ;ve6 m)cwbh8uqdoh,) u, x7yel?

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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 ,x7o j0, jacdj+5iuxv7kxo *yelectric 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 oppoc. huxc0ud *a8jfjl0 9site 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 placz0:slq+vyvc0 m .0vro ed 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 is accelerated from restwwhu81rc 9rn/*y0k m6ppk7cb to a speed v by a 500 V potential difference. If the potential difference is changed to 2000 V, what will the new speed of thkrywr0w79uc1 n bppmkh/* c68e 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 om- cq4wbo;x 7potential 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 wqo n:q, 9;stgna4rd56rv 3sj A to point B along an equipotential surface;qd5q:4w6 9v3gt ,a nnro jssr.

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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 bzezok2 g 8 uzx)d;9 iq9pj,qf1e

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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 equalbd/b 8(o*ue*nomdqz t v,t:t4 to that on the electron as a resu o *qomut8nv*4bdtbz,e(/dt: lt of moving 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 7g1 li:4lzxlh a 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 u8ypbx/5v,2bso; jf vto

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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 dis)cs5cx8ot p3 stance of 2.0 m from a positive point charge is 100 V. What is the absolute potential 4.0 m away from the same posc)spcxt o8 53int 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 di:3 v7bfzzbied09zae(l s,d .jstance of 2.0 m from a negative point charge is -1 i . s9e0b7zazd j(f,3dlz:ebv00 V. What is the absolute 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 3q0mk..eed z/ usjjb.0 .0 V when a charge of +Q is located at one kzu. 0j0ee jb s.q./dmof the square'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 center of a squb;:tn6cqb ,t )l tilhne6j*ju33o9x hare is 3.0 V when a charge of +Q is located at one of the square's corners. What is the absoluthl6qix,b)9j3nj lntho *t 3;:6bcetu e 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 )-rasz 9q/llclw+t1 c mwg5s4charges 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 i;l8ow,k g6 dyk+ e1ajhs 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 respku22vn+kws*trhhz8j,r3 ,g zect except that one has twice the plate area of the other. If the smaller capacitor has capacitance C, the larger one has capacitancet j ngv3r2zs,k*2huwz,r h8+k

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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 o1j p./on, l,jtzp aytsumryc+. tk-,3f the plates is doubled and the distance between the p1a+u,rj jp.n,k3oy /,s ttmplc t.z-y lates 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 cax:rbnb3f 29m; k mv io+y.yl0hpacitor fully and then is removed. The plates are immediately pulled apart. (With the battery disconnected, the amount of charge on the plates remains constant.) Wk: .+b2o 9mhirlnm0f; 3 bxvyyhat 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 (u7p0qvn 6lv nplates of a given capacitor is weakened, the capacitance of tu 6q(07vvnnpl hat 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 consu s3g3p8df m r(y/d5prtant voltage by a battery as they are pulled apart. During this process, the33rdm5r/gpu pds( f8 y 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-plate80o dmjs* pb5g;ievf fiv7o- + capacitor are maintained with constant voltage by a battery as they are pulled apart. What happens to the strength of the electric field during this pg-v8ibmvjidf0;+soo e p*7 5frocess?

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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 dieles d evrk4r-1m- yi9)lactric material between the plates of a capacsm9 riaevy 1dl)4 -rk-itor.
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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 plateryvf d9xzw 578s of a capacitor. What happens to v8yx w95frz7d 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 thc -jix1fx+caw): o1dye plates of a capacitor holding a fixed charge. What happens to the electric field between the plates?1jc: x )od1wxyaf ci+-

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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 connecte vvodfhyzp,t;b/g(44g 8 zp1vd to a battery and becomes fully charged. The capacitor is then disconnected, and the separation between the plates is increased in such a way that no charge lz gftv hyp/d8v,(g 14op ;z4vbeaks 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 capaci78-a 7fms xtm:tuooe 4m u6bv mhy*r9:tor holding a constant charge causes the energy stored in thamm7fu:8smurbtyvt*x 7:-46ah o9moet 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 acroskcycp5* a m1xs 5z91lif,sks/s a given capacitor causes the energy stored in that capacitor s i*1s/zsp kx,km yccf5 95l1ato

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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 fel*icsqk5 o 6)zg*r*lrom point A to point B. What is the potential difference cgro *q*iz)6l5 sek*l 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 electb,u r12g lo9d4r;sjsz8 ljcn1 ron from point A, where the potential is -50 V, to point B, where the potential is,d9jrjsu1c812nb l;zo l 4grs +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 potetst q15ufoikpitce324 5m -f5ntial difference of 500 V. What is the ui-15itk2s 3tfo mpe55ft4qc 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 through an electric potential d,/xe()kj)a huws xgj1 3p)l1zetlk , oifference g 1 hpjeajlx,)w(3el)z)sx o,/ukk1tof 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 fallspn0-4zzdd( a 8n* idkb through a potential difference of 1200 V. What speed di* 8n dp-d0 (4azdkzbnoes 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 movingh7spjjzfjvw2y; c4jx*w , l-1 $8.5 \times 10^{18} \; electrons$?

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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 rq9:7f )sv5ephlykp9 through a potential difference of 500 V. What is the vel l9qr5 k9syvpep:h )7focity 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*a p6z;jjx5p o accelerated from rest through a potential difference, and afterwj56x;z*jp aop ard 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 potentia m .md(/krw/gx;p )focm 2:mtvl difference between two parallel metal pla :p m t/;/)r2wd(cmkvg xmf.omtes separated 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, is direc;+)mdkp 9ft7 yk2elrlted parallel to the +x axis. If the potential at x = 5.0 m is 2500 V, what k)ftkl;y7 9l2+merpd 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/:qbib(lg 1 1 aq3:(qesd b7uiyC directed toward the east. If the voltage measured r q(bl usaby 7d:i1:b(qq gei13elative 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 fiwnwp0 sge+ 2-ueld of magnitude 3.0 V/m. What is the change in kinetic energy of theuesg+ n0-w2pw 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 12-V battery. A zaiv l vzq;:.4) xidr(s2y/rmn electron r24azzl;)dsixy: r rq(v m/ i.veleased 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 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 to9u38 h yvii ,bnsq7+fi e2,qoi a 12-V battery. An electron released from rest at a location 0n,3s+ 79 ,8yhvf uii2obe iqiq.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 ,m s2cbxc5 ad5ku /ai,m, are connected to a 12-V battery. An electron released from rest at a location 0k 5uscc/aia,52m x,bd.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:j g*ju+dcbno/ xr9u7 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 pouc*dgxru b+j7 n/9o: jint 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 et d69thym44hre74i qof 50 N/C directed toward the east. If the voltage measured relativ q 9tr 47y44heemtid6he to ground at a given point in the field is 80 V, what 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 0h-yguat tb;i-2 8)fkhrubzm. 4 l/xu a potential difference of 12 V, it will acquire a kinetic energy (in the absenceg t0mh.u zu;84 k-2ltu)yb/habfir-x 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 potentia)m5*z ds ;fvi gtl*zfkzu;3h(l at a distance 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 meti.nss+bic o+8tx 6)1 qepsxn+er stick. Find the electrical potential for the center of the meter stick.. 6 i+ )xsespq81on itx++cnbs

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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.jor4*aqze w ln+ cc./90 m, 0). If the potential is taken to be zero at infinity,c+4/r lja .n9ewoqc*z 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 atwzla8v5c/7co9 y wf/a (3.0 m, 0). If the potential is taken to be zero at infinity, what is the electric p8ocwlfva//7ya c5 9wzotential 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 t3 . 54dbhuyt hmn2fi6a -2.0-nC charge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the work requiriu3nhyd 2f th4t.56b med 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 of ewn/8 bj+d5mesiw:k x/p84vw sides a and b. Whw+ / jd/8ekvwiwxnbp5 em:8s4at 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. Charges of +4.0 mC are placed 8 l+lomdu50l ufzj-r5xse -c 7ah6u,gin two diagonally opposite corners. zu,0d lojl -+5 ug crlmfea-76sh5u8x 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 (charge +2e, mavrxmlw211 8cvoy p6m)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 to place three cha;q5 l e222 com( l1ede-ayrmicrges, each of 2.0 mC, at the corners e15 c o re2iml2adml(y-e;c2 qof 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-mFl;ih+i*vbm + )kn; qgxptai 2: capacitor when it is charged to 100 lkn+;)hq;gv tii m: bi2 *axp+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 arep ;)v; toer* ;hc/mmcsz 5ui2ha $0.50 \; m^{2}$ 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 171 xjic h5u3ao fy8 ii2q8ejit.4ynn with air, and the plates are separated by 0.050 mm. If the capacitance is 17.3 pF, what y7i3j aihx1 i2if8o84tyc5 1nu. nqjeis 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 p 3rs3 p)ob4yzmlates 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 sepanbfz,/9zj 5yedy3(li, eqib 0b.y/e5 zs,j g lration of 5.0 cm. If the potential difference between the plates is 2000 siz 5eel,,bzlzfyy9bqbn,5d/e/ i.y0j 3( jg 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 100-V battery. Aftr/mva,ubxo3j --/,rbv z+wd zer 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 connected during the pzv,--v,rb or/ b 3wm duz/ax+jrocess?

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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 placed8horujb/ kvwq x ):*,p on a 15 mF capacitor. How much energy is stored in the cap 8vjuwxk hpr/q:b,)o* acitor?

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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 storedo 55zosskpp5 3 in the capac35pkops5 oz 5sitor?

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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 pl /xd2 t;-u6xm/ d/hnm/vbnbilates of a capacitor when it is connected to a 12.0-V battery. How much work was done in chargixvimln u/b /d6t/ /-m;dxb 2nhng 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 stores:*4-5*yakya pbq lkgw $2.0 \times 10^{-3} \; J$ 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 capacito4en :0ky:9ko.k jy j5nbu yk:wr 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 a yzlbvvu :jo01u7 z4l9rea $1.5 \times 10^{-4} \; m^{2}$ 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 oxt /6, ab1stbvf 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/c q +shpx4 lar7zv*s03 (m8rh1xaudr is constructed 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 capacitow,ut+(wti 1hr r is constructed 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 to a 50-V battery and becomes fullcdv1sqyno9dozirm1 , bqg3f,8o i:05y charged. The battery is removed and a slab of dielectric that completely fills the space between the plates is inserted. If diz5q bs n rmd,ig91:1o8,3ooyfq0vcthe 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 fully chaf : gcelcg 0 dvzab7w-(4hus:*rged. The battery is removed and a slab of dielectric that completely fills the spcas4wc0:hf(*eb - u:vlzdg 7gace 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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