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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 vectorp zvnny1j-nq) )mmexo 7 jgod86yp8iu9,;m s)?

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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 i4ci0ak;z4dist gsc : , dn5gv ns2zv))s 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.a u3k07 xyszbum52v2+vprqjx3 z;ts, Object A has a net charge of excess electrons. Object B is grounded. Which object is at a higher potsq ;,jx72szvkr xuzatm533ub+ vp20yential?

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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 fp s6 ,g 6av:dkq/5hmmaield

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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 oppoqic s4kw3) 5kqcr n2g6fra1 t-site 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 arqyldgav /d. - u:j*c3he placed 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 rest to a speed v by a 500 V potentiardv xnb,7evnzq9x(.t uh752 il difference. If the potentihn7x5 ,er d(i2b.v vuxtnq79z al 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 the same 86jjc0viql/vw k)h i6 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 equipotential bkqqo(4vl1becv61m ( 3)pol4jbnki 2surfacepk(bqei(b1vo46q m kclb vlnj1) o423.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surfal 7f0a92 sjiudce 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 equal t nzg3dooa *n8pzj2 a*f4-oc q0o that on the electron as a result of moving through a pcjp ano **a-n4fz3q8zdo2o 0gotential 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 eozd)b an5ee7 pm9(7 a ailhxs/(by (0a 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 corrtrsqs0gtek3+6 p ws 22esponds 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 dis-3:a 2lnszu,u, qepd*m mfg8ctance of 2.0 m from a positive point charge is 100 V. What is the absolute potentisup, - n* f2qcg:38mlaem ,duzal 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 7wvd .(o :.h1 ilyekyla distance of 2.0 m from a negative point charge is -100 V. What i: l . .(wvdhylyk17ieos 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 squareseu )xvt91x v0 is 3.0 V when a charge of +Q is ls vx)1xt9u0evocated at one of 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 is 3.0 V w7ra499e 0gfiimqsu-1 f*elwdo1 e p o8hen a charge of +Q is located at one of the square's corners. Whaap1d8 7ioe1 wfrmo 0lq e eigus-994f*t is the absolute 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 t vh.4jd4wr icubyykp- ;n:.* phat 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/)aoy , tk/ mgvlpb3n5bbd;0k is 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 arelp f.kv1g8xd 6 identical in every respect except that one has twice the plate area of the other. If the smaller capacitor has capacitance C, the large6vgp1x8. kfdlr 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 og7rf/rly i24)iftxew1 -b p8the area of the plates is doublp1rgf)i 4iy/b7 -t8lxr wf2eoed and the distance between 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 tvs qw,2l8)drtw/z c hg57ib;i hen is removed. The plates are immediately pulled apart. (With the battery disconnected, the amount of charge on the plates remains constant.)q;/w5tgl,w)icrzi 78 bdsh 2v 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 n3ofw5,8ow2lrug knbt) :jp3capacitor is weakened, the capan:ftow l85 33bwg,ojp)2rknucitance 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 para90yvxns3m -a kllel-plate capacitor are maintained with constant voltage byak0 xys3n v-9m a battery as they are pulled apart. During this 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 are maintaf1yrzwt- x 40hined with constant voltage by a battery as they are puller0xytfz-w h 14d 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 ; m**h9j 7sy niv2ycalbetween the plates of a capacitor.n27j*ilmvas;hy 9 *yc
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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 plauebhk-9w(. rq ced between the plates of a capacitor. What happens to the capacitance?-u kre9qhw(b.

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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 a9, qax3h ds2qf o-jb(between the plates of a capacitor holding a fixed cha,-q2os3faaxdhb 9j(q rge. 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 battery and becomes fully cuhfj,so p 8x8o/g xd58harged. The capacitor is then disconnected, and the separation between the plates is increased in such a way that no charge leaks off. The energy storx 5fgjox8s,8u oh/ d8ped 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 h),qncq 1 arzc-olding a constant charge causes the energy storea1rc),q-z c nqd 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 causes the7 z(orjegp+h 1g+d3kb,zgqo8 energy stored in that capacitor t3pbjdq r k z1z +7+oo(ghe8g,go

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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 gcl (f 4zux4u*to move 10 C of charge from point A to point B. What is the potential difference betw4z*x ug4(ulcf een 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 fr3,/naao bcb2k-ugcv2ncgs 7 +om point A, where the potential is -50 V, to point Bc-,bg abn usog + avkn2cc27/3, 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/6rbfe du,3vn potential difference of 500 V. What is the kinetic energy of the proton?e vruf/b,6d3 n

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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 difc n:f-m*5ybt: j i:zff6 s1r1xav,ud zference of 500 V. What is the speed of uzv-5,:f1cifz*dn : :mrts1j x6 b afythe 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 potentialtp,b*lfiq h(x8xsm(uf4k7*s difference of 1200 V. What speed does it acqu7*itp bs (* 4u( fmxx,qhkf8slire?

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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 i k8vy xw0/ fe*qg+k/cin moving $8.5 \times 10^{18} \; electrons$?

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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 difference of j9w:e+ h0 wksnkjfs-6500 V. What is the vej- 0khnjf6 :s w9k+ewslocity 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 objec) eyt+ s+i+pdit is accelerated from rest through a potensiy )+d++peti tial 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 maintains7q qmc4.- y ,v6 hq)sk*efhlss the electrical potential difference between two parallel metal plates sh46sc)hq7,sf lmv *eqsky .q-eparated 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 ae(ohe, . babmuyrqzm9-(l,c4 magnitude of 500 V/m, is directed parallel to the +x axis. If the potential at x = 5.0 m is 2500 V, what is the potential at x = 2.0 a9 ,,zbme q4 l.oheru-(mbc(ym?

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42#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Consider a uniform electric3lt1jb 9na pc1 field of 50 N/C directed toward the east. If the voltage measured rep911balj3nt clative 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 field of magnitc.ibs6 f.io.dd iz .iass bi9pppn0p4;o+)9 x ude 3.0 V/m. What is the change inpsbad)+ipioibxdc . 0f6.p;n. s9i 9. izps4o 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-V8: rp6dmnqk7th0lwh : td ,t 4/pdj*lx 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 initia t*x lhdw7tkd4h, l tp 8p/0q:n:jmr6dl 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 lu0 r:h*2nfb:v,6zr atmo qj 112-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, how mz:o 0tbm:a6u2j1 qrhn ,r l*fvuch 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, sey.lj)km-l z b6parated 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 zbl jkym -).l6plate. 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 direy gx;ao1)*hqdcted toward the east. If the voltage measd)gq1x*yaoh ; ured 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 tcd:)z; kdcn9len4q88rnf - azoward the east. If the voltage measured relative to ground at a given point in the field is 80 V, what isqdc9za;-:)k8lfdzn 8nr4n c e 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 a potential difference of 12 V, it will acq81 fptcpe0bd,j/avv 9.x q) ukcfa)+tuire a kinetic energy b9+/tt )ek. cpffvjup18vcaa) dx0 , q(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 distance 5 vw+c6q irlf2of $5.0 \times 10^{-10} \; m$ 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 s:m ;xbbz2q7ecr/ /y-yr :x+xmlujz( vtick. Find the electrical potential for the center /z yzym2e /jbxbl;rx- :+cru:(vq x m7of 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) and a -2.0-nC charge is at (3.0 m,gd8u:j4e x(n8 rmwz:n 0). If the potential is taken to be zero at infinity, what is the elgnm(xz 84wju d :re:n8ectric 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, 0). Ifyq* zy. 7v+bui qakz8a/ek: -a the potential is taken to be zero at infinity, what is the electric potential energy of a 1.0-nC charge at point yuz a8zqe.7:y+kaka* v /-ibq (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 a -2.0-nC charge ydd7amb. d2pv8 7 e8qln(*ed ais at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the work required to bp(ea dvbm de*7dly28qadn. 78 ring 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 thecxo70,vlh *hd corners of a rectangle of sides cv h0*dhxol, 7a and b. What 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 +4c g4uwdjhk5hr:/*gyu-3 iz0p lm k*r9.0 mC are placed in two diagonally opposite corners. In the other two cur rl-ykh /5i g9g3 4hum *dj*0wkp:zcorners 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 (chart)eha) dle ;,r 5v-xu3oss3p.c0ygmqge +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 necessary to place three charges, each of 2kabre,2-j3od8n fms 3.0 mC, at the corners of an equilak jofsm bneda2r,33 8-teral 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 pr 4+5 zz6)mnkas qlo*mlates of a 2.0-mF capacitor when it is charged to 100 mn rsq4o*lk5mzz)+ a6V?

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60#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capac i+)vscx4wseaxs5p gq4;nt 24 itor has 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, ana9cb/ g;cj8:h** wxoqp i0k sdd the plates are separated by 0.050 mm.oqx kdc ;bps/wa *8hj:gi*9 c0 If the capacitance is 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 capar;b/r6f e0 + kufhoc(wcitor 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 separatix l(:j+p:wljpon of 5.0 cm. If the potential difference between the plates is 2000 V, with the top plate at the higher potential, what is the electric field between the :j+: lpwpjlx( 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 acroscwp6 uxh7 .hldo+v +o5s a 100-V battery. After the battery fully charges the capacitor, the capacitor is immersed in transformer oil (dip5d lv76+h+ow.cxu ho electric 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 iskjfvte.f.y14uvw7m ( stored in the capacitktmuff( ejy74 ..vwv1 or?

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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 theqzoa 6 4yl4 1nrlns8p8 energy stored in the capaciqr p48yzaol84lnn61s tor?

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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 8 pobmfz79hhmull++y 1xh b1 )flows onto the plates of a capacitor when it is connected to a 12.0-V battery. How much work was done in charging thizho u+1b91fxl m+yhb 7mpl h)8s 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 thw8 cu1v+zq;nl t od0e 60n8mw(0gm ntaat 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 plaz2-k( tnwg nm76 tx y/ch05gbrtes 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 r llrbsz,jn90s +bo 37of 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 capaciton j :kncwj:h gi714(ygr 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 wi/ gye(bjvt)1 eth 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 cons g;1ak,u9kyc6ns;4ize m wt8otructed 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 become) bu3p9dhz u/v g8lp+cs fully charged. The battery is removed and a slab of dielectri lp8 )gpchuubvdz3+/9 c 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 i 23ps (( sh4,;s,7,fegf bm ae01jrbwwlb rmvconnected 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 bemg;w3reswaf(brlv7 0sjf124,im( ,p hs , bplates after the slab is inserted?

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