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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 o9zk6a4k 25 fqr g.horis 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 ipp+83 eh-f7iphgyf4gnd0 * i vs 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 from their surroundib rfz3w 6+0,t rbpjt41hcv2pdngs. Object A has a net chargz1+ hj3fb2 dp6cr,w0 trvpb 4te 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 1 d-cv:p7oord8n-u 4 fger/cb direction 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 directioillk1-.j +be7zae .x dn opposite 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 r0ar5c7q) aqo xc48dpconducting 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 9fg0r8rc)-a.x qc fsa from rest 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 tcgqscafrrx9) a0f .-8 he 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 po 7rw85 , fv.raiyxgqu0ints are at the 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 :.wmm vzu6w u ;vy2-rnohjc *w(*wy;j9l 8tlrto point B along an equipotential surfacwz:v-ol2um;v hlwr6 nujy ** ty9; wrcm.8(j we.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface mustb9 f)sd mu* /c qh(bz0-lt9kya 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 equal to that on jaft t6w3p, i6w6 npp,the electron as a result of moving ,tpwt6iw ap 6jf 36pn,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 .;k;e :aldyh2 .lcd zkxt-sa0unit 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 co b r5rx )tllb7pbs (b-1ei.e/trresponds 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 22mntn.io3.5pfv : l en.0 m from a positive point charge is 100 V. Whv. t: ep2n fnon5im.l3at 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 o-2j+sm*n poc tm,aw ,rf 2.0 m from a negative point charge is -100 V. What is the absolute potential 4.0 ma+- rjswo,tmpn2*cm , 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 exhr rin3*4)ccg act center of a square is 3.0 V when a charge of +Q is located at one of *n3cr4r)gi ch 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 square 83g( n)iub yrqwx1e ,kis 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 when a secon wn(eq u1i8b, k)yrg3xd
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 tbheac w)v595j;mayfwl*bq;kwdx,)hv 5k3 8 ewo 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 c*af4rs jxk3 *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 6q:r+ha1aqf t+tw*uej,uyy6oqo qnu) y)i/ 7every respect except that one has twice the plate):1t*qa of6y uyje ruuio+hqaq )w6,+/ qy7tn 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. If the area of the pct)mwp6f0a;o 8ou h5b lates is doubled and the distance between the plates is halved, what is the new capacitancmbho)8f p 5au;oct60we?

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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 remove9 ep:qc2y5lk ad. The plates are immediately pulled apart. (With the battery disconnected, the a lpay2c9qk:5e mount 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 capacitor iytc5xe9,2ch.u0jxi 2 pl;akea0) vrj08sx h xs weakened, the capacitance of that0jehprt9i0 2s5vyx;u,lhac0.a )k2 xxc 8xej 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 con,nf(-yerop-2m 0;tb r cq+mg0oo/ wp jstant voltage by a battery as they are pulled apart. During this proceo0-j, nmp0t/rp(f2ooq-wbm grc+ey ; ss, 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 para .yqqjr57vd7kllel-plate capacitor are maintained with constant voltage by a battery as they are pulled apart. What happens to the st 7 ydqqj7rk.v5rength 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 ad b(y2d6bu2hm7z dokvd33mm/s ding a dielectric material between the plates of a capacitohvbz/mu32 dsdmokbmy d732 6(r.
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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 pl+g-thv+43evg0 vm8rs /* sqc0 u xfsfoaced between the plates of a capacitor. What happens t/ms3 h4x fo+ +g0fvv -0s *sgvqtu8rceo 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 cgqo 0/+8glswk pd gj47apacitor holding a fixed charge. What happens to the electric field betwlo8 g4kg/ jq70gw dp+seen 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 connecte( k1ffhbs jm6snuyw5/d) ci( vt54lx:d to a battery and becomes fully charged. Thejh(:56bv fxk/4tmucis y 5swf n1l)(d capacitor is then 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 of a capacitor holding a con43j7 k9koxfeo stant charge causes the energy stored in that capf7 jo9xkk 34oeacitor 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 az rohq m-n+yf qvwwoq 17dc4n;/6z*2d given capacitor causes the energy stored in that cap 6dqo zo hwnz2v-dw4*y/;cqm1+ rn7fqacitor 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 pointuyvom :-kb oa2e,r n8ov0o9 ,t A to point B. What is the potential difference between points A and Bmvko o9obae-,8yn or20 ,v:ut ?

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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 potentiab vcb 2dx av0.zlr8wvtn 8+-z1l is -50 V, to point Bbrct bz .8vd -w80az1+n lvv2x, 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 ele03tu5 jxj oi1x7xt2kbctric potential difference of 500 V. What is 5 x70j1b tokxt3ij2uxthe 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 pot t2;t*4 aepbzzowl*y*l bmw.2 ential difference of 500 V. What is the speeb wpa*lm2z* 4 ywzl; 2*.totbed 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 5ga)h0mb8ytduk:fkv m1 2b7ypotential difference of 1200 V. Whu 71m)yb58tdabg:0 kkyhfv2m 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 do in movin--5 ok4 gf)lb. eu6s/kgqdymmg $8.5 \times 10^{18} \; electrons$?

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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 dip 6;msyyggl0 9ke a,p,fference of 500 V. What is the velocitym0kgpl y;, pe9 y,asg6 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 acceleratedkmj izj( m dtbgf bwe32y6g5+);t.x) c from rest through a potential difference, and afterward the ball is j (3kgb+mewi526 z xym)c.tf ; jtb)gdmoving 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 difference between twci)tk6 k6oji m l1,fd2o parallel metal plates separated by 1.0 mm. What is thj c,imf2il6kko 1 td)6e 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/m5:cjbi ,e,mrr , is directed parallel to t:bmjc, er, 5irhe +x axis. If the potential 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 electric field of 50 do06f;oq +pxw 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 tha6;px+wo df0o qt 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 the5 +.q+/srl6r yjxg lme direction of an electric field of magnitude 3.0 V/m. What is th+eq5sx. 6jm/rl+ l gyre 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 12-V battery. p wopuu+/k9 ;gn71ioxAn 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, /g9okxpwu +7np1 uio; 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 to a 12-V battery. jq57l0 ryl4 :uz/hl9-ndryig An electron released from rest at a location 0.10 m from the negarjl/d n490yuryil z-g 5hq :7ltive 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, are cok b8z 2 t3uunjpm 8xp(m*lr)5ennected 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 the elecxp38ek)(ltup m2n 8bu5mrz j*tron?

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47#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Consider a uniform elecfml/p(rz/. rjpa ybt 2 ;q)w;6 e,d lp7-kfwzatric field of 50 N/C directed toward the east. If the voltage measured relative to ground at a given point in t zjlt-qaeakp; ,.f pb w) lr2;( p/mdw7zf/6yrhe 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 dir-r1m :wb yp vdd)m9bi4ected toward the east. If the voltage measured relative to ground at a givenrv9y :b) mw1-ddmp4bi 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 throug:bkyr 9zq z p4a3l1 qdj3m0hn3h a potential difference of 12 V, it will acquire a kinetic energy (in the absence of fric4y0zz9dkr :qnp 3 hb ja3q1lm3tion) 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 potentiaks myt3rj(a.w20 yq a8l 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 meter stick. u/ol(3j xfmbr,. e5svFind the electrical potential for the center of the metebmv slu5oex 3fj (.,r/r 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) a88l8u dihc.w cnd a -2.0-nC charge is at (3.0 m, 0). If the potentialul h. 8c8wdi8c 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, i ,nt1(g90a7w2 z;mejvezetm0) 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 (0, 4zeg2 ,tv0(me17zw9emj nt;ai.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 c5 wq +bf7u.kwef, hoh+harge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the work required to bring a 1.0-nC charge from inf boq keffw.h7,+5hu+ winity 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 arengo**7( bwgqp1 ktvpa63s0 ylt m*.nd placed at the corners of a rectangle of sides a and b. What is the potential at the center of the 6p*ynntwqm.7 3t g1da0vbp* osk l (*grectangle 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 onm;cb r; i mxktm5d.:r. a side. Charges of +4.0 mC are placed in two diagonally opposite corners. In the other two corners are placed charges of +3.0 mC and ;.. :tid5xbrrm;mk cm-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, massvo2mr:9fwr 4s 7e -awetg jy(*xo9d+*cw3h da $6.64 \times 10^{-27} \; kg$) 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 tsge7g. bf;e wjs, n.f,o place three charges, each of 2.0 mC, at the corners of an equf,f7w b.s.njs;g ,eegilateral 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-mF capacitor when it is charghnr fy4cx pz,h5d9 q;.q;m0 hbed to 10 qyph9mc;x 0h;bzdq,45rf.hn0 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 area o h jdx -g3a()0(kyclhmbldpv9h0c 25$0.50 \; m^{2}$ 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 sepq0 p jw7 is-7m:c s4r3kob3w6z1 kxwwjarated by 0.050 mm. If the capacitance is 17.kj3oq7673x smc ik1p-rb40w:w ww zjs3 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 capacitc- jc c. .murl, o8snz:v9fw9qor has plates 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. Il2a:uche az4 1x+p0p1jfz8 thf the potential difference between the plates is 2000 V, with the top plate at the higher potential, what is the electric field bett 1pzzxcp +8hhf4lu0:2a 1eajween 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 1 rm 6k+qs0xv)5(vj(ph2 vrel d00-V battery. After the battery fully charges the capacitor, the capacitor is immersed in transformer oil (dielectric constant = 4.5). How rv5jrqs +dhe( pk )(602v vlxmmuch 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 mye7zq, 1+egab uch energy is stored in thb+eg, a q1y7eze 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. What t-c4f a5 qf), ,9fk)3eo*r cvcsopilxis the energy stored in the capacitor 9kl xf)rq5caiff,c pv4oe)sc,3 o t-*?

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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 ontuzezj xk4*o*n+tq :; so the plates of a capacitor when it is connected to a 12.0-V battery. zn4 +o ejx*z: ;squtk* How much 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 stwv b9j4 f:20iluikgp0da3x h1ores $2.0 \times 10^{-3} \; J$ 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 capacito,iw,aeyz(1r 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 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 consikqofpupo:i; t)m9:h: sts 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 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 p;4/ / xc+qetu8dfo7ialkpv u,lates 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 oobi9fb ;w87ama/yd/).dkj q i 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 construct9bjj :z7 r 2)hiicr7okmofye+q c0 -*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 to a 50-V battery and becomesswq.r y3iymsw(1v;yjs55*fi 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 capacitance of tvq;iyi(j* 1fsmsw.535wry yshe 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 r;h b.dzb3gh)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, wh; z.rbhb3hgd )at is the voltage across the capacitor's plates after the slab is inserted?

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