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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 nouh0/2rpw:em w t 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 gr)5. 9.t aa+wgf wo st)kby-xis 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 ack; byi n,79ni 67r bqki dc:oo)/glh3re insulated from their surroundings. Object A has a net charge ofb q/o:7i ,idky hicl)93nborn6k7gc ; 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 directv:he67s h*t,ry69wdfi w. cc gion 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 e4y.qn c 9y juu/zc-l41elyzi /lectric 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 placf hkqa: (3cul3*zc9v*x av+ift7 8ifmk.sof 5ed 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 acceleravbnn7kc3l( /w u 4.dhyted from rest to a speed v by a 500 V potential difference. If the potendv (khw3c n.nlb 7y/u4tial 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 o mox;v .08a8rso0)(7v8bejm cdrjy cw 8g2eg 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 moy c ad)ru;e55r )qkgh9pq 04lvved from point A to point B along an equipotential surfac0g4eakupq5ry)c9 qhlr; )v5d e.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface m- w a x 0)pj+7gwii 9ntgn(.kv2kib/pgust 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 ebgisan kn)a1/:f8*k jlectron as a resul inkjk/a:*s 8b 1af)ngt 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 *c2/xz/cg uh qa 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 e**,joabog7t (jnvt*af vn37 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 m fro9w)hfr*qzkbijn0 z8)u x5ulp8jvx;2 m a positive point charge is 100 V. What is the absolute potential 4.0 mk)uz) j plf82viw9bh;unz 8r5x0* xj q 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 of 2.0 m fro q)3se6/loiuw4e l, l6kxcce 9m a negative point charge is -100 V. What is the absolute potential 4.),cc36lklu/q4ix9 se olew e60 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 3.0 V apv,su84jmd8 ga6 g 3,/thwi jwhen a charge of +Q is located at one of the square's corners. What is the absolute potential at the square's center when each of the other corners is also38h/wdgj ,aiv8m4sjautp 6,g 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 z 9v)9eqt(snuwhen a charge of +Q is located at one of the square's corners. What is the absolteu9qv( )z s9nute 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 twgmvn q- *t)4i om/aoh0o 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 voltz kl6x0s/+/,urer-mvsda1c c s )e9qp 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 capaktv.a nfd7:3d ,*nmnd8zl aeqi :om97 n63jo ecitors are identical in every respect except that one has twice the plate area of the other. If the smaller cafno3adm d8oe7,m in6kn7 qnt a.v9z*e3: ld:jpacitor 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 platesmzp2rd mvx6ndy6xkl2: 4)k(h is doubled and the distance between the plates is halved, what is tzm6:6 2 kyxk rn)xm h4l2vdpd(he 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-pla1my-kqtl -kkh q l:81bte capacitor fully and then is removed. The plates are immediately pulled apart. (With the battery disconnected, the amount of charge on the plates remains constant.) What happens to the potential difk1:l-qk h 1bty8kl q-mference 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 is wead0rmt /5 mp6bgxg(v9 ykened, the c/mdmb vg5x9 ty(p0rg 6apacitance 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 parallel-plate capacitor are maintained with xqr.jn*c,/y n constant voltage by a battery as they are pulled apart. During this process, the amount of charge on the plates mu /ryxnn*.q j,cst

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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 paralle8uduow 8,sr(t 1 c.fwfyhut.4 l-plate capacitor are maintained with constant voltage by a battery as they are pulled apart. What happens to the strength of the electric field during thistfu8tsuy,w4. r1d(hcfuwo .8 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 materialhr1q)n jycw-*y 5.ji k between the plates of a capacitoknycwhyj - i).1 rqj*5r.
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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 plaa)q3 npaihob (8;(tuwj sn uv+;z0 t7ates of a capacitor. What hap(s( )w uijap tz 8+;avhn;0o7t3nqaubpens 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 plates of a capacitor 35r;q dw van3rz :hs.iholding a fixed c3w q;.isv:ra3nzrhd 5 harge. 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 battjgc p9t 9wh, ad-*4a qr2yn,ytery and becomes fully charged. The capacitor is then disconnected, and the separation between the plates is increased in such a way that no charge leaks off. The energy stored int p*a-,29yyg,twahd9ncq4rj 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 holdinga . oj*;;x;v 0jgno t*ugm+vkb77gta a a constant charge causes the energy stored in that capacitor tjxb ;atagoga.v7tuo;0n+g7m kjv* ;*o

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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:f 30scdiwy( 7g e1 ru (*brlcejvi,0u causes the energy stored in that capacito0jfdgesw ri17v3(0uc*eury( l, c:ib r 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 y3)kq8 mf0 v7i+umrdr to move 10 C of charge from point A to point B. What is the potential difference between points A and)vmrur mfd+i03 7yk8 q 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 potential is -5/0 pjffg3 xgf*0 V, to point B, whexgg *f/ j3p0ffre 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 pi mo.,) aqz9m ,*uyfj 0j1gyenotential difference of 500 V. What is the kinetic ene. mej,zy9y 0*,a ijnm foq1gu)rgy 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)dx9-ml0wpsj.zmb om8l5b d3 through an electric potential difference of 500 V. What is the speed of thmp. zm05w8sl b dl9jmxbd-o3 )e 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 :( l,vol1)rhcc. uxxlthrough a potential difference of 1200 V. What speed does it ax)uc,l(x l.vco: lh 1rcquire?

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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. ndu3i(e h/mi x;fq-a/ 9-1nbuile*s c5bdeu in 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 potenti-l buw ,usdp11me/3ks al difference of 500 V. What is the velocity of the lkumbd-3,sepw1u1 s/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 accelx1, kwdbhfqt/ 16 s1cmerated from rest through a potential dis h,mt6kxbdw11 1cqf/fference, 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 electrical potential differenceena1xpoo p),gme9 38c between two parallel metal p381 op eo,e 9gxa)pnmclates 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 +2uxhd7 lqbd3/. yp gcmagnitude 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.d2q37+b/yh l.xguc dp 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 50r(i;axi,rh k . N/C directed toward the east. If the voltage measured relative to ground at a giax ;r h,r.ii(kven 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 o21mw m vql -nweqjd4a:j/fks *ppr ul; x/-4)ef an electric field of magnitude 3.0 V/m. What is the change i2auqpd;em vq l1m-4:r lxfk/p-/)jw *s e4 nwjn 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 uk4r *y :8sncbn/.ifba 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 potentialn*:b.r8u4n sk ifyc/b 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, sepaz*ljk -qpm2 n-*oguq;y kn t p.8eml-5rated by 0.20 m, are connected to a 12-V battery. An electr 5 el*. m-jot2n8gp- *uq qln;ykmzk-pon 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 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,c :a:l7qmgtw/m d5 hi 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 dista5 /7mlat:mg:qc ihw ,dnce 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 o4pawh x3tna6q v5m 1h5f 50 N/C directed toward 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 point 1.0 m directly east of the 5m3 q6v h ptax1a54wnhpoint?

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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 yd1pm nx .h5m9 iz*md.N/C directed toward the east. If the voltage measured relative to ground at a given poinm m.mh.5dyx1*z d9 ipnt 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 a potential difference of 12 V, it lj2owt8p (n x;will acquire a kinetic energy (in the absenc;(n2to lxjw8p e 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 distan n 1u7 z+hgnzf:q;z:lmfh:zv,xo:7 av ce 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 9rj;4u9:wk1s/ ujh cygb/ztu ends of a meter stick. Find the electrical potential for the center of the met/ugr1 k;ju:4u yhc/t9wzb 9 jser 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-nCd,u0q qmwq vee;-9:wk charge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the electric potuek wm:;,-v0e9 wdqqq ential 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). If the pote(nfse 16forl 4ntial is taken to be zero at infinity, what is the electric potential energy o(l4rf1on se6 ff 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) andu 6f jhp(1pul3t. fndv x/o.0y a -2.0-nC charge is at (3.0 m, 0). If the potential is taken to bp03.xjfy1ut ( uod/h. n6vplfe 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 char,yoi*x0ckv 5 gge +q are placed at the corners of a rectangle of sides a ax ik0cg *v5y,ond 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 +4.0 minpk5a9c. k 7zC are placed in two diagonally opposite corners. In the other two .7kcnaipk 9 z5corners 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 (char0v p75le8tat1ecl z ,zge +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 necessa:xm1 /f- cfb efmuwmm:k(mj syxu7v io, /d/)3ry to place three charges, each of 2.0 mC, at the corners of an eqo / x1uiubj,vkfy::md7xmf(w m)f3emms/c / - uilateral 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 charq0ie:j lp nc34t*hk6 0 rxvrl.ged to 1000j4rkpx e*rl: qt0c.h ln63i v 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 a e.cf04f ue0tm 0ps4yme o)aw:rea $0.50 \; m^{2}$ 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 platejrjc6oz0 0j f7s are separated by 0.050 mm. If the capacitance is 17.3 pF, what is the plate rczoj706jf0j 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 p3u y ri:i7i,;ms)gj qnlates 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.2cc)o.0yi qg k If the potential difference0. cqg 2y)iock 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 c0ma30l,uv-5gsl0jda ye l 9chonnected across a 100-V battery. After the battery fully charges the capacitor, the capacitor iss dh5 39lylaujvge 0a,0ml -c0 immersed in transformer oil (dielectric 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 mFx+; pie4n9e9l. j oeon capacitor. How much energy is stored in the capa;jx+ien lo9e n 4pe9.ocitor?

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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 mFihg 8w c*09f* jpkgg5)vt,hlxjk+q,c capacitor. What is the energy stored in the capacito j8k,lw+*h0hpcfgv t9gj ,xg) *5qckir?

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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 capaelj(a6 hnxvvc(sot ) q8yi9*l a/k-j;citor when it is connected to a 12.0-V battery. How much work was done in charging j-lo/( *e)9 vta;h sy8iq(c xjnalk v6this 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 32ckzds8:yl9cc2 hef is 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 ofe24rghf +a: ft62y 8x7j tmqklx*5snr 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 consmbx qhypl+k+:+peqt5i574 n qists 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 capacilvxhlvp.sq p*8 q0w g / 9g95xwfbvd13tor 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 capuevo u626fp a tahe366acitor 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 constructed with plate ax r g6fo2/z,)q5eqkg(ct)p u3bdw8l frea 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-u nv x1;qkq272tlhkdc,khd/ 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 dqkk/7xq-k12c uhd,n d;2thl vielectric 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 tp54ndj)od1 hz o 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 plates after the slab is inserted? 45no1hp )ddzj

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