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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 vpmq/ nkq e4n-xl j a1u*qxwv54.u4 ,bjector?

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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 q(vyh yf9vc.( 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 insulatendk*m(0r58 s q8lj2 q3eqbabx+jlj*o6j k1y h d from their surroundings. Object A has a net charge of excess elect0rqj*j3 exq(2hld5ybblj1 j6smoq +k8 8ka n*rons. 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 ib5 ;nzifg, +wdn the 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 f-lcdn:ulapo w+ 4d6gvq3v20direction 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 conducting sphe-n qwqyaohh:o 8k/ n-*re. 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 rest7m6mma-+ fmp f to a speed v by a 500 V potential difference. If the potential difference is changed tfm6a m+m7m-fp o 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 pote luq lt,xv8s8c nd(l20ntial 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 s+ 1sjumd 6 ri 6e.a+s7gtx1k6vpk tk2equipotential surface.6 72rd.j+6m s1ku gvtpki6x+ 1ssakte

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface mqtz7ks1 rz8p /ust 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 equak4cpu m+iv k1c-, y;fnl to that on the electron as a result of moving through a potential difference of one volt is k f4v cimu+,-y1kpn;c 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 unit j q7xd40marx2y) r 9 pnbf:;jtof

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13#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  One electron-volt cor r*3.ns,x nap:+kwz8/r jwxd xresponds 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 mq pae2lko0;114 rdnyf from a positive point charge is 100 V. What is the absolute potential 4.0 m away from the same point c0kr;a14 2pqlnyeof d1 harge?

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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 ob.x.9vtky3m :1-,q v2jwhmmv w/ir uc f 2.0 m from a negative point charge is -100 V. What is the absolute potential 4.0 m away from the same point cha /mh9rj12 i vw-cmt.wkq, 3vvbyum x:.rge?

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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 when a charge 9:mn-65h8ujwpi 6yo/ w bqcdtof +Q is located at one of tnuy w/t-8b 5cd qwph:i96o6jmhe 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 c(,weaz(d-mvf enter of a square is 3.0 V when a charge of +Q is located at one of the square's corners. What w z-((md,fa evis 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 con+o( d fph:hop zp.ny.co7-x( fsist 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 isl- rzix wm1nvzb8-9 ;0hmu1ib 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 every respect except that jm+v3; 9ehmnx one has twice the plate area of the othe;n 9+3ve xjhmmr. 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 capacit0edh(owc*of3fy p j ia 0i0(e:ance of C. If the area of the plates is doubled and the distance between the plates i:iw*e 3 00cah(e0(pd yfooj fis 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 pg 2qs9fk5-b *yytw0gaarallel-plate 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 potentiaygbyqtg -ks9a *50w2f l 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 weakcu;zcy 9i+g d8mzax/xv +( *dmened, the capacitacxz *vygdc(9 xm+ a d8;u/mz+ince 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 constant volt4+3e mtsxaut+ age by a battery as they are pulled apart. D+ us3et+xa4mturing 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 cat8jw;qfey:h0i.7 wo whom1 :l pacitor are maintained with constant voltage by a battery as they are pl toyh ieq:8; wmho:fww7j01.ulled 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 dielectriy/+ zfbihkwml;zb3i h-0+fmn ug4 97qc material between the plates of a capachz;fzf gu0my-q+n9 mw 3ik+ b i4hl/b7itor.
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27#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A dielectric material su*nwzl7b lw9 k756 hnsuch as paper is placed between the plates of a capacitor. What happensbn9wll w*nsu7z65 h7k 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 capacipx h qzsh*pf1v my-( 8ssi-52ytor holding a fixed charge. What happens to the electric field between * s-(5x8vi21zyhh -qms pyspf 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 ueeq(6 /icie0ljoy5-battery and becomes fully charged. The capacitor is then disci6c5(0i-/eloe yjequ onnected, 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 capacitan;j5bd 5f ztbpwf)u 6-vce of a capacitor holding a constant charge causes the energy stov)dj w5bb5zptf -;uf6red 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 5,6 murqi0hy* zzi 0lqthe energy stored in that capacitor torqizl quh06iz 5my,*0

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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 10rabt7517dj.k:sl epo )ic bz- C of charge from point A to point B. What is ta-bs.1t5:ce kd 7ij7zpl)rb ohe potential difference 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 potentia7 td5h+xmue+gio dnoa+r rc n+/ lz.6;l is -50 V, to 6r;x.amt+o zl57+egicn ++nord u /dhpoint 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 rest, is acceleratw4f;,qa(pky ced through an electric potential difference of 500 V. What is the kinetic energy of the protonq4kf w(, yap;c?

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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 m m5-t. wh16a sv( uzcr9+gpdcdifference of 500 V. What is the speedh5zmds( 1 .cup arc-6v9m g+tw 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 potential0u0 -rbqgdxm z2x l7.r difference of 1200 V. What speed does it acquirm0dgzxbqurl.0 7 2-xre?

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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,z1t d(q1 u)ucv(w qbx 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 accegi) bkqa+z4/6yxa 2kclerated through a potential difference of 500 V. What is the velocity o )ykizax+g akcq46 b2/f 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 ackm).knyuxc1l z38na2.w 9u l( vy9qxmcelerated from rest through a potential difflnzl.muwx v(99 8yxycnu 2km)a .3 qk1erence, 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 differencewone8s uyo:(/v3 trd*ao)6 wi between two parallel metal plates separated by 1.0 mm. What is the electric field betwesiwy3r :do )t/6( 8vaoow* neuen 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 fi,8vyr xy*8bsxer wi 31cdb n()eld, with a magnitude of 500 V/m, is directed parallel to the +x axis. If the potential at x = 5.0 m is 2500 V, wr 8rc)bxn e,s3d*yvyb i8 1xw(hat 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 electrict ,997a e vcu8k*rqefh field of 50 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 point8c,at *veu79 fkqh9e r 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 elecjl(mcup9b/zl z,4crgbgr 73t2s2t)l tric field of magnitude 3.0 V/m. Whs3/tulm 7 lbz49 (r2ctl,zgbjc2 pgr) at is the 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 1ziz k5dwds ,312-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 positivekzz35id,w s1d 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 cong 4k23vk:o2bzi vkq eg.m)*vj5sgu*dnected to a 12-V battery. An electron released from rest at a location 0.10 m from the negative plati dg:e 4mj5)2g*3ks.q*uvo zkvgbk2 v e. 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 cocy; e) +ojc1bkq g/ xyeaax/.1/3dppannected to a 12-V battery. An electron releasepb ae p1dx//3k agc+oj)x/;y. yc1 aqed 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 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 field1ckl0 x;4(lt *avi4 lm0azgg s 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 1.0 m directly east of the poi1l0;g0a*gv4k4szc(i a mt lxlnt?

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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 th4,3 mi p:-gqxqr /fpc72aibxne east. If the voltage measured relative to ground at a given point in the field is 80 V, what is the voltage at a pi i4n/mcqq2g-px :xf ,r3a p7boint 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 jyj awi:34, judl.-l8f t-cu jpotential difference of 12 V, it will acquire a kinetic energy (i llu,.cf j juyjt-d8i:aw-j34n 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 ogbkk(dv ) (e:8twm;r yf $5.0 \times 10^{-10} \; m$ 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 mete:nsk,ska0t bv ylf+: +td4;z s :n9mmzr stick. Find the electrical potential for the center of the meter :lvnk +,s+ ;mdksaznmb9tty0f :z:s4 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 chavi5zkpreg7+tjj,s:bu w 9*c )h+8shzrge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the electric potential at point (0, 4z5 +v:hgjsc7*k8uwz9hise,rjt p)+ b.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 charjknay)xd(. ktdway;(c4 1ewx9; s6onge is at (3.0 m, 0). If the potential is taken to be zea;e916a(jnsy)x4ok(dt. ;n y cxw kdwro 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 at (0, 0) and a -2.0-nC chamj.b p v 5,+ug8+mfzffrge is at (3.0 m, 0). If the potential isbuf,zjp+v f+m8. mfg5 taken 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 the corners of a rectanga 9pyzvzhe+-4le of sides a and b. What is the potential at the centerz -h9pa4evzy + 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 0ujum/yvo 4 o0mC are placed in two diagonally opposite corners. In the other two corners are placev4uo u /o0mjy0d 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 (chbw:zln.ej3 .s.v poh0 arge +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 2.0 mC, at the c/q9mh w:9ts,qu u/ibuxdr-t / orners of an equilateral triangle /u/wbut -9x,qq iur /d smh9:tof 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.c ( w1u::b1 vofr/py/o:hzfzi0-mF capacitor when it is charged to 100 c:p(/rw:1fhz1 :vyubo/ifzo 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 .epcz t.7a6ow( ykv4 shas 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 capaxn b m7 s785tgh(/mfmtcitor is filled with air, and the plates are separated by 0.050 mm. If the capacitanc 8nxtm7hbm /tgs57m(fe 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 capacijs.sdzac+ jf xx)2un1i6j j* /tor 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. If the poten+qer; h 1 vx9b(r89ti-dzpieotial difference betw(z+ o91 hbreevx- ;q8i ripd9teen 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 connected acri- min9ca6cv -oss a 100-V battery. After the battery fully charges a6iccni-v 9m- 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 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 sto6ly;tr u5 yz7hpw h6,r+ sxz)cred in the capacitorrch+z6,ph;rxwt yu )z5y7 s6 l?

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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 storedm. t/;zof -oau in the capacimtzo/u.- fo a;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 flows onto the plat;tr7t,ybdo f7es of a capacitor when it is connected to7roty,;fb d7 t a 12.0-V battery. 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 ii9-jsa rmv7 i : mayx./(wnm.zs 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 areblo*8l.ce7 owc;t*r) 4nwtf5s o x0 pqa $1.5 \times 10^{-4} \; m^{2}$ 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 capacitoruu :8s ivv)l(z 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 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 capacit;x 5lq q0g.ax uu; okvbql:5z;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 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 platej4gus7 lm, o+q 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 area b8 ynjci f1p(c 4wi1pohy59q2.k 2abmof $0.40 \; m^{2}$ 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 becomes fub,2otdqxwmd75.4 wgimja 7 s:lly charged. The battery is removed and a slmi4mg do a 5 twqjx:2s7b7,d.wab 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 battery and becomes fully chaft yk3y tp6yml:t qx3sa q: -ac93j8a6;b.r morged. The battery is removed and a slab of dielectric that completely fills the space between the plates is inserted. If the dielectt33ms x:ry y8jc3pk 6ot-b af96al ym:.aqqt;ric 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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