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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 v-wikjv s9 yr+41o *ftfector?

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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 isn-qm+pjxukfo4vsh* pz j6i y nh3;6:8 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 objecte,tu)mn oh7pafc2yd,i-f) r 4 s are insulated from their surroundings. Object A has a net charge of excess electrons. Object B is grtu2fn a7 ,hecfyd)4pom, )ri- ounded. 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 directio zk7x )u; f/.wjp5qqhqn 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 direnxc w; i em9+8o9tzrt)ction 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 pla)d:(dzwtnn)( rq:ox)hw gu 7xg9 pf,jced 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 7jytnp78n lbdb+ .w2njgy 02lis accelerated from rest to a speed v by a 500 V potential difference. If the potentln8n p2jy 0w77btg+ j.ldybn 2ial 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 th(p yqxn94 axv68t/vwwe 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 to point B along an eqb )gh lw2;4glluipotential surfaceh4blg2 ;g l)wl.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surfae3lx9w mmfts-f s9; sql/.y 29rgx, wx6,wvwhce 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 b35uggl6wv *r6fca2a4x aa r6g ojmv28y a particle carrying a charge equal to that on the electron as a result of moving through a potential difference of one volt is referredamagourr4c vfv 6a*x5 23 jw6gg2 la86 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 unizgnf9d4;wz -oj )0r9 :1tj50e omvj1maloi lwt 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 correspondgkbgx,l3j8 ov4v.7qydd 9*g t s 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 m0;ut iq 6z9vvm from a positive point charge is 100 V. What is the absolute potential 4.0 m away from the 9t6m iu0qz;vv 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 from a negative point charge 1ttdgu sq.ka3-t ad(- is -100 V. What is the a.kg ta s1t-duaq3 d-t(bsolute 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 3.0js-; -x gr*j+c 8r* e/u qminx9zyqge+ 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 each of the other corners is also filled w xe r g-z-;*8 9y*qrxcjjm+e+n /iqsguith 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+jnv: b2 c:gpV when a charge of +Q is located at one of the square's corners. Wn+gp2c b v:vj:hat 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 consi9.*amvjo -e) 7pqjje dst of two 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 i c8*pc/g 83 xcd 0gtfyauh0u)ds 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 identiwg z7lvrr-cmk/ fp 2cb2s+1g1cal in every respect except that one has twice the plate area of tpvlcfmgcwz r/2+1b 7sk-21r ghe 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.rkx-jfa0+ rta-0je s ,jl/o d C. If the area of the plates is doubled and the distance between the plates is halved, w k,jt rd/s 0l rj+o.aaxf--j0ehat 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 7+r2wewrg,gw then is removed. The plates are immediately pulled apart.+r,w27wgwg re (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 capacitor is weakened,d(5u ui nsxa7m bxc.r8bd*es94pf(c7 the capacitance of ths4(9bm uibx 7pue s85 rcxndd*7(f.caat 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 crkyt9cz4hbj*ovd,7 (8i e: mr apacitor are maintained with constant voltage by a battery as they are pulled apart. During this process, thec8her9:vyb74k ( j dz,mrtio * 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 capacitd,s3j8z.g6 s1p6ktl qp 7y/ ol v-vq(n)d gzsaor are maintained with constant voltage by a battery as they are pulled apart. What happens to the strength of the electric field dur(vo t6 1jyd g).n-s kavz ,p/7ssqqd6 z8lg3lping 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 betweijyzcs3.t9(ot -1 u rhen the plates of a capacitotj3h yc- 91su (ri.tozr.
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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 plates of a e2wrj3,)bligcapacitor. Whare)j3w,2gb il t 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 plates +g1iok az,c-vl4-g o 4)ogwtp of a capacitor holding a fixed charg-gwal-)tgpk,vcz goo14 +4oie. 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 ck;r thado8j+9bb+mwsy ge934 harged. The capacitor is t9webh4+9 a;jom 8gb ry+stk3 dhen 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 y 3,3yyt7hv d6 eqxpxzgz. -1oconstant charge causes the energy stored in that capaq1xh7xzd.og ytp ev6y, -3 3yzcitor 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 aoyjp*:jb;, i ag iv m4/p;(z,s9j gczf given capacitor causes the energy stored in that caf/j miozj,:; vjz* c4syp; 9(,pgbiagpacitor 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 to point pbf+pir4is 3 s9o+8nex*b v-uB. What is the potential differ b3+oe ubsn9i*4ipfv8p+ srx-ence 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 electron from point A, where the potentialcu7,n vvu88, dfx5/ x53g9qzx qtqh op is -50 V,5,8qd9 ,53q 7vhn uftxpuvxc8ogxz q/ to point B, 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 rfr t7kg0o 81xt luvbwj:+u09r est, is accelerated through an electric potential difference of 500 V. What il91ut tkwbg80x+ v ou 7f:r0rjs 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 through a jn//ang/0o/g2a cb rgn su6m5n electric potential difference of 500 V. Whan/g26gr jb5cgosaam0n n ///ut 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 through a potential differenceha t8/nc zzzqiz0c8 e-48.jbj of 1200 V. What speed does z jca.80cei-zn88 /hq4btzjzit 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 uw 9d0e2sbvxitn b,s1p95)uydo 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 throkofxr2meu 69tv(inwo: el51. ugh a potential difference of 500 V. What is the velocity 1ro xi.kn fl5(o2w9u vt:eme6of 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 yhvyxk+ 8yud)b7;*kn(scc; z a charge of 20 mC. The object is accelerated from rest through a potential difference, and afterward the ball is moving at 2.0 m/s. What is the magnitude(ck7;8k h nbxyuy* y)v ;d+csz 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 two pwf,sr gke ,kn/ce(sqpa.. (c9arallel metal plates separated by 1.0 spre ane/,c(ws ckgq9 , .k.(fmm. 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, wi5x7yaa paepb dz0g.56th a magnitude of 500 V/m, is directed parallel to the +x axis. Iapaby5xe p.70g 65 adzf 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 N/C directed toward the east.4*hi 7y nmvp/p If the voltage measured relative to ground at a given point is 80 V, what is the voltage at a point 1.0 m/4* yphpm i7vn 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 e9j e ll (yez7c3gxjs,;b s*,x:bnr/ cfield of magnitude 3.0 V/m. What is the c*/g3bj( br ;,xns l7j:x zcey9scle,ehange 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 connect9cw 3 -ssoo 3jhtj7r9ped 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 1.50 m from the positive plate, what is the potential difference between the ojp7 s3w9-jcoh tr s39initial 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 bats.w.v)8lfq kx q x3:dstery. An electron released from rest at a location 0.10 m from the negative plate. When the electron arrives at a distak v3: sw.fd )xqx.q8slnce 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 connected to a 12-.t3 cef3gdz3zd/uf d (V battery. An electron released from rest at a location 0.10 m from the negative plate. When the electron arrives atdzz ff3d3ct/g(ued3. 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 electrpd8+iw)c+ daz ugs p58 ,7 tgmqqzl;a(ic field of 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 zp+qw8(picsdqug5,) gtl a8z;+7a dm .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 elecc24jqz/4gfp. j xl( rutric field of 50 N/C directed toward the east. If the voltage measured relalj c2u4/p(gfq 4x.z jrtive 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 a potential difference of 12 V, it will,5;pjbl sze1h acquire a kinetic energy (in ;hlbje s5,z1 pthe 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 / )k u4e9hfxixdistance 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. Find the elee r+qbd:+vn wt:(p:wsctrical poten: +pwwe:s:nt+v dbqr(tial 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) and a -2.0-nC charge is at (nka.r2. b wvb+3.0 m, 0). If the potential is taken to be zero at infinity, what is the electric potential at point (0, 4 b.k2.vbawr+n.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 the65mwt) fc1lb m 64wreo potential is taken to be zero at infinity, what is the electric potential energy of a 1.0-nC ch1mb4 mw5fl wto6cre6)arge 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 a -2.0-nC charge is at (3.0 m, 0). w yd7f2j :b)8gcmur)1 bsc7zvIf the potential is taken to be zero at infinity, what is the work required to bring a 1.0-nC charge from infinity tow1vuy c7br2sb) :gcj7)zf 8m d 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 5n g;b*tluao2r atp..+q are placed at the corners of a rectangle of sides a and b. What is the potential at the center of the ra r.nu2.ab ;o*tlgpt5ectangle 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 in two diago cx pm;f8lq19hnally opposite corners. In the other two corners are placed charges of +3.0 mC and -3.0 mC. What is the absolute pot8l xm p;cqfh91ential 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, m4+q/xh3 yjl wt 8eobs;ass $6.64 \times 10^{-27} \; kg$) 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. s,dfpi;z(.+ p ,hyamrn: am;6 fy:hay0 mC, at the corners of an equilateral triangle of sih :yf (py,pf.y;n+;mzm ha6diaar , s:de 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 t tow9bzc04:fis charged to 100 V zbfc:t0t49wo?

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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 has6aogzdcd vo9,g sd+; - 4z8ffi 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, and thv. 5s(,dkrn sse plates are separated by 0.050 mm. svkr(s d .,sn5 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 capack7zf4kl ;kmg4jno,:l i e -2eqitor 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 capacitorjgd.bx:cic8 ( has a plate separation 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 f:8xbd(cj icg.ield 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 cpgti++df, )+q fowc 0a 100-V battery. After 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 th)w+c0pgfqoi+,+ dc f te 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 place u. jd1vf3mxmwo 89v5vd on a 15 mF capacitor. How much energy is stored in the9 u53do vxmmvf8w1jv . 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 is the energy stored 6fu2cu3+ l:/ pilxik hin the capacitor?/kcxu+3f llh: p6ii u2

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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 .bt 5 *tjzn0 5w.b:iusmwr,h qof a capacitor when it is connected to a 12.0-V battery. bi b0t5rs5:.th* unz mw,jwq. 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 l. )tfyevf**m 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 of thyq pds.fij( 2)2s5s 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 consi+8m o2 wqzc0np3jcf19op le-vsts 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 plates of 0(.zudt* po8j jgzad-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 pl1 4o1mjr mnppsp;vz/, ate 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 capacito dx-pkpg7+4i vr 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 becefwu0i 9 sc zyw9sn2fgh-b*e1 doz.;3l2f*y somes 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 the capacitor after the slab is insertedz fus ;go*flz dby*y1fn9 3-c22w90swh ie.es?

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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 connectedu. nw9 n- 9n)zz-0dvlfqw-y tl to a 50-V battery and becomes fully charged. The battery is removed and a slab of dielecwdu- lyz9q-wn 9l.-n f0ntz) vtric 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?

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