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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 vector; ey qeaqt0*pazk78d-?

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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 d fz b8ri96n;s4tkdt(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 insulated from their surroundings. Ob1s5ap1 u ghhkcp/z ++:eidek8 ject A has a net charge of excess electrons. Objska/p1z +dh 5: 1ge epch8+kuiect 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 ,akgit4 nh*e 8direction 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 /1-btv fn ofer1h,.od9+nr ez direction 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 holly1* wtk-p*guz7ywwsp 3pb / a*ow 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 r wu6ztn(o u19e *ap9qiest to a speed v by a 500 V potential difference. If the potential difference is changed to 200a*69eopn tw u9 q(iuz10 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 the same potential is91wrgl c )8orv u4c9-w2qyhmm 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 s t,qd70ovtcx - 0j7lmfrom point A to point B along an equipotential surface.c,0dsj-7 lx7tvm 0oqt

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface mustbg3wdgg-gk0y5el9r+vf g idi+op2jkw i6 94; 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 the electrg3rg hg xrha 0 ae3(f+85wda) 4yqe6ouon as a result of moving through a potehex y0 r4+3eg f8)56 w(a ahgugaqor3dntial 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 ay clr12p :hx;t*dy dq3 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 coron*t,f(t b o6 a-a;pixresponds 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 mrj/dgfx) owpeq/l.8 ym5.w2e from a positive point charge is 100 V. What 8y .5x/p jlrfe )2dwwqego/.m 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 vaw5 7 4p/-wx:ouqac o(gx4ytof 2.0 m from a negative point charge is -100 V. What is the absoo :aatx5uwvg-wyo (xc/q44 p7lute 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 at6*wcz h4g .eix the exact center of a square is 3.0 V when a charge of +Q is located at one of the square's cornersh * ze.4xic6gw. 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 is 3.0 V when a c u9lp)sa3dv x 9*xx/*y-xpxxiharge of +Q is located at one of the square's corners. What is the absolute pot) xyx xxa*v9s-u3 lp d9x*p/ixential 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 ax0jzaulg0:,,r yhm2bb do ijna*6/ , ure

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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 o;75c zp v ou8bgsdo:4is 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 ato- +ksz s06nlre identical in every respect except that one has twice the plate area of the other. If the smaller capacitor has capacitance C, the l tok- lz0+s6snarger 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 qs.:+,qgkow ba capacitance of C. If the area of the plates is doubled and the distance between the plates is halved, what bq qgwo,+s.k: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 parallehn5r6 mnv,v yujaeg(cq1d4/ 4l-plate capacitor fully and then is removed. The plates are immediately pulled apartn6q41v (54/, dcmevagujyh nr . (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 capacitobk n,xq1zk5t .lvfcy4 p2448 faam,h*o rjp9sr is weakened, the capacitance of tha, v4 2m4 fppxa9t4fzhb.,sokkc q1arlyj 5*8 nt 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 w3jz eq,w ,t 8ex heh/w8lvbj3*iq u77iith constant voltage by a battery as they are pulled apart. During tx8 tee8h jq33le,/jiibq* u,7zw vwh7his process, 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 parallel-plate capacitor areaks++;f-z h4pak +qmw maintained with constant voltage by a battery as they are pulled apart. What happens to the strength of the electric field during this pro+ ;4phmk+w a-q afksz+cess?

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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 matcnlv32pt;s n3erial between the plates of a cap ct3l;23pn nsvacitor.
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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 zesm3 0jb n:nk,o 3(cbbetween the plates of a capacitor. Whajk :zbs3nn obc,( 0em3t 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 platespk*y15ww))w wd 0 ttse of a capacitor holding a fixed charge. What happens to ew0kyts 5wptd w1w)*)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 battery and becomes(q(rbkp1y xi li(0mk.t y6ee5 fully charged. The capacitor is then disconnected, and the separatbimre0yiy( 1( xp6qtk 5ke(.lion 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 capacitof/ p-.4r 4wkb+qa 4eflizfs2 zr holding a constant charge causes the energy stored in that capacitorfp zlwsekq 2fbi-+4a./zf4r4 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 causes the energy stored in that kcen(x/(5x7o ec8( g* c(ziwwaapx n;capacito*8cp (xx5z ew ogcaan(w 7(c/;i(xnekr 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 tob5wwwa85s ln26)/ya av 6qjhs point B. What is the potential difference between points A ana av26s n) bsl68wwahq5 w5yj/d 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 m20kuvf2 2kxwpt/ bn f-oving an electron from point A, where the potential is -50 V, to point B, where the potential is +52x2/0pvfk2uknw -fbt 0 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 electod ye. qps 9jxjn4g g;0-a(*hpric potential differenc09yjae-p*g4jnh dpg( s;o.qxe 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 throkex s-c /dg. oi/h44y 8,ndr(bfk f.iough an electric potential difference ofk4d4 .d, n/x8ki ./-ogrfhc ei(bsoyf 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 falls z(sl zj ld08w6through a potential difference of 1200 V. What speed does itjwzz6sl8l 0 d( 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 movi+5v*z;oc iufsay1r. l8bhn1 qng $8.5 \times 10^{18} \; electrons$?

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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 potenti/9ktxg+z 8 ao5)ks xjlal difference of 500 V. What is the veloc xlaxojgs k)8zk/+59tity 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(o2(yt: aa,z jr:gzj)j r3aej ccelerated from rest through a potential differen( zj (tgrjjr 3:ao :ey)2zaa,jce, 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 th f-mex8h oo -3lze1jx)e electrical potential difference between two parallel metal plates separated by 1.0 mm. What is the electric fi -lm 1- xejzhe8of3)xoeld 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 dire kh)hym d wave(c32bs9m(ew):cted parallel to the +x axis. If the potential at x = 5.0 m is 2500 V, what is thehya w mhv(seedw ck)(3 :b2)9m 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/C directed toward wpb. 7 .-r*bj 6nyfb 9u(yxglnthe 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 westyxg.r9-j 6u n. 7b lbyn*(bpwf 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 fi t/vu-;kuxo*v.u v vg.eld of magnitude 3.0 V/m. What is the chv-uvu*. xo;gu.kvv / tange 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 my+m0ywk zi5-battery. An electron released from rest at a location 0.10 m from the negative plate. When the e 5-yki 0+mzwymlectron 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 connectd xkh. y6,j w4jy;pcv3ed 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,dxj4 hp6kj cwv;3y.y, 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, sepafwmlbj3 y2pngt )+g; a 3ekv;(rated 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 thal;3e wmbk 2)j(;g gvn3+tf pye 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 east. Ifftn bk62) kz 1ufo93uyt-kb (a the volta3fbku9u t 1ba 6)2 kof(yn-tkzge measured relative 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 pf+ bdo c i:(07prd*uythe 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 1.0 m directly south of that 7+dyop(b*iu:rfcd0p 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 thbj9;eco9;*9pcp h hf nrough a potential difference of 12 V, it will acquire a kineh9j*n;;9ocbef cp 9p htic energy (in the absence 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 potential at a distar ll5ismv hjc7yi4*3 oh ;29e q,xee*ince 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 meq wy0c 7rwl84cter stick. Find the electrical potentiaq rc4 c8yl7w0wl 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) andvc3q dr12 oq0 z+/b ,2dtu)vmm/ou thv a -2.0-nC charge is at (3.0 m, 0). If the potential is taken to be zero at infvd+q//mo)c,0bou 3m1hzt d 2tvq2rvuinity, 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 at (3.0 m, i3ulv):h igk gz814ix 0). If the potentialiu1:xi3hlkz)4igv 8g is taken to be zero at infinity, what 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 a po3xs2sh 8nkp fr+y(4 rlyq(4t (0, 0) and a -2.0-nC charge is at (3.0 m, 0). If the potential is takeqpopl48(s 4+srhfkn ( yx2r3 yn 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)?

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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 t iizgn6b34zx/srp *eqv8n 1)bhe corners of a rectangle of sides a and b. What is the potentialg)8bzbns/ 4z*v6n qpx1ei r3i 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 pl9, c fk+6x smob; yyachs06qj4aced in two diagonally opposite corners. 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 cen4 shkaqcmx9+0y6yb 6fj ;oc s,ter?

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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,kgr dn5 yl:. 9rbfq*6r 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 2.0 mC, at th1;l 5 njpybql9e corners of an equilateral triangle of sidlb1ny;lqj 5p9 e 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 cap:t : fjcj,lh35fw zv+v*zqppn2gjw(8acitor when it is charged to 100 V?vfqph gw2jf3+ j,:wnz(*:j5v lzt p c8

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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 dj2oy-mp7*6; msr h uvof 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 ;*wgr0v 5nnfv2a2dfz with air, and the plates are separated by 0.050 mm. If the capacitance is 17.3 pF, what is the plate area z5 a2r2ndfw v0vf;n*g?

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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 plates ofq 6hduwx bgd :4n3v7:l 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 nr)9nbr7xc( m a plate separation of 5.0 cm. If the potential difference between the platrrbn )c9 7nxm(es 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 100-V battery.tl*1-cvi 7:jm k ;yhmkfdg9h* After the battery fully charges the capacitor, the capacitor is immersed in transformer oil (dielectric constant = 4.5). How much additional charge flows fro*:g kfm;l h 97jmvticyh-1d*km 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 store m 8zljpa)qp9:y7m mu:crub;6d in the cb8u: :q;u z6jmm pl)r9cmpa7yapacitor?

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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 fo,exe(k g tjq:/ jkq ct:(:+dstored in the capac( ,e/:tod :fecqx tgkqj+ j(k:itor?

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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 ec9 xii*akiya ex .+fup yj9-7np2 8g:when it is connected to a 12.0-V battery. How my g9 eina:.xu i*8ypfpki-2jca9 +x7e 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 isiaxhjh-u5 ol7f*4j)7wc-gykz x 5 r xbvk5 .i5 charged 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 plates oef4q(ihyo9 4/kfbpt )f 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 at++ syu-dx9o v5ck2pldq8o8u rea $1.5 \times 10^{-4} \; m^{2}$ 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 capacitf+ 7cyi.uijwm6iz w24or 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 capacito0*uqh 2d ckw/g5n ,ldsr 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 capacitor is conxj48p nr bj;+j 98lixlstructed 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 tj c/l,u16l-adg,pbc50-V battery and becomes fully charged. The batterg,c-pd btu c,/a1 llj6y 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 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 m yw5t7v)mt y.battery and becomes fully charged. The battery is removed and a slab of dielectric that completely fills the t7 v.wym5)mytspace 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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