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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 ,so)fm1s7rfb v1x)iv 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 is ah of4dvf-(d9j m9 ge4x

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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. Obcqk,++8w k to8hwf5kfject A has a net charge of excess elecfow+fc kw5k,k8q h+8ttrons. 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 direction of the elea*kuvj b,3fk9xq.6l ectric 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 directio1ow --, llsfnfn 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 birojunp-h7a2 gpt52f 85- cf 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 accel30e u1 n*:nfx)n :mevs7(x hlthshrdv:csj2-erated from rest to a speed v by a 500 V potential difference. If the potential difference is changed to 2000 V, what will tvs::h3nsc f20x(nee h j-hsm1t ux:7ndv*l )rhe 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 is referred toi40 lj(tlf9* ny-ymvp-gxuf0 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 wriwc vch/67 bs;;oio)4.ug l surfac;c.org/6vwulo) i4 bw si h7;ce.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface musoa4uqgia.bo / 0bxt84 (dhppu7hh2 f8t 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 elect+ l a x3ydoh:/iz1ix9yron as a result of moving through a potential difference of one volt is referre+:x io lyhdiy 139zxa/d 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 unxg)af ji.h;,iit 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 corre0bbo3bu; ca :esf4 4-:pccru jsponds to

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14#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The absolute potenti9a-m5ac,bj qqsbj9 e0 al at a distance of 2.0 m from a positive point charge is 100 V. What is jjaaqb-m59qe b,sc09the 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 of 2.0 m from a negative point charge is -k.mhccr (d 8k9100 V. What 8 ccd9k.(krhmis 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 square is 3.0 V;5wtv8t*t: donnnstk0 7*h q,h jum7j when a charge of +Q is located at one of the square's corners. What is the absolute po ,hnk87n:;twmovsq* tjtu7 tjhn*05 dtential 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 je6. qql0nm8k e1iesc3.)k7ow ddp dre9y9 t3 a charge of +Q is located at ons dre6c q9 3 odeyl3.pq7e89wikned0mk.j t1)e of the square's corners. What 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 thatb.- go8re pva2eldp9in8 +un( 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 iu ,koted36t,1pbij+ps 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 *e br9 1c-pllfthat one has twice the plate ar1* bllp-ecfr 9ea of the 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 C. If the area of the plates iq 7afjlna) :byxuk/*5l-t/r f s doubled and the distance between the plates is haf-yk a l5:*r/nlx )/b7f tajqulved, 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 capacit-; rzsgg b;j(6 ym3ux2xya xv.or fully and then is removed. The plates are immediately pulled apart. (With the battery disconnrsvz3 ;yx;bxyx 6g.mgj a-(2uected, 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 ofedaw9; uba.9 fdgbj5qhm6q4d1+/j eh a given capacitor is weakened, the capacitance of that fqe.;hu/5b 9d94am+dw61agdejb hjq 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 maint*xu eku7 h wxf obd*sh)c0-q36ained with constant voltage by a battery as they are pulled apart. During this process, the amount of charge on thee63 f w7*o*ux0uqkchb-hx ) sd 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 maintained with co gw2:a5 b8tu6rp.zf7ql gj.k onstant voltage by a battery as they are pulk az:68pu.w 7tg2b go q5lfj.rled 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 addmvf2j t jtfp )kigs,+0:ef;o-ing a dielectric material between the plates of a capacitjp02stg;j): eifko-ff mv,t+ or.
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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 paper69j ;ue of/ez5bw *ozm is placed between the plates of a capacitor. What happens tbo ;m*ou9wf/ezj65 z eo 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 caly+5 f+x(n hfhpacitor holding a fixed charge. What happens to the electric field betyh ++f5xln(fh ween 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 cj-wg17q: p +hz03ddor5z4 zq yrje zw)onnected to a battery and becomes fully charged. The capacitor is then disconnected, and the separation q)wrd zzzwjz0-5+qdog 1h:74y3pr ejbetween 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 os)m; ;w un6: 37zs te4gox8qr3:rvgy ixzqzp *f a capacitor holding a constant charge causes the energy stored in tz rur7se sq3t;;3 4mg n6gzpqyi:x:x z *wv8)ohat 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 qiq(op kvnp7b e8vxg4pz542 (h;8azethe energy stored in that capacito(2z5ven8q7 xi4ppgvz4h q(bao ke;8 p 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 to move 10 C of charge from ow/c(hv5q t)ipoint A to point B. What is the potential difh vt/5o)cw(iq ference 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 cg e/3dx9 z,zzfrlun , jv25j1electron from point A, where the potential is -50 V, to point B, where the potential/ nz2jzrlzc,j35 defv1 u,x9g 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, in/)euvmn obvt596 7 b7tpo (cos accelerated through an electric potential difference of 500 V. v7v /7uo6n5nbtbe o t9(pcmo)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 through an elect3b1 i+fi ga5kv vyq i.u2)7xciric potential difference of 500 V. What is the s2 y +ii gbukqc.5xa)1vvi f3i7peed 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 ntn3:w73a;3sz ww iitthrough a potential difference of 1200 V. Whaiw z:t 3nw7 anw3;3stit speed does it 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,lcn +6f5t vdq fc;7ne do 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 potential dify4a3f*(. yjpy i cdfs0ference of 500 V. What is the velocity of (s a.difyp cy3j*f04 ythe 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 acces :vr 1nbu p; 8acsfb94r,c(wglerated from rest through a potential difference, and afterward the ball 8; s9 ncrrf sc:v41,u(bpwag bis 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 tj7kz)wio-:)q spn .gxhe electrical potential difference between two parallel metal plates separated by 1.0 mm. What is the electric field between the plategis.jqk : znx-7) pow)s?

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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, isw ja. x+5s7+btha) jgq 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+.)xh + qw7sbjatja g5 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 dirynlhd8a ,e e9tdzj/ddgtz b.d* m ,82.ected toward the east. If the volta9nlzgd,8*bey 2jht.,da . /zddet 8mdge measured relative 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 magnitude 3go(h yk+j cnqhka/,l 6g w/p-;.0 V/m. j cglkq-,p;6+yko nah hw /g(/What 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, a5fdo7h2ru*wat 7.d ewna2jmgy ;jq)8re 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 ah7g maoaw*.nfj wd er;y8q )tu7522dj 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, aren f.ezw+ 58uno connected to a 12-V battery. An electron releasuo wn 5.f8ne+zed 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 u*ib5lr .cmej rch.-2yf1d-f onnected 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, what is the speed of the elect f-e5.i rj*2y- fhlc mrd.ucb1ron?

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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. h4sm42xg 8g *ywe7ffx 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 g7mx y*fegh2x44 8w fseast 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 dirvmtugh0.t52dx5 o2 jms5 d8xoected toward the east. If the voltage measured relative to ground at a given pdmd 0xvj58t5o. s m2tu5hox 2goint 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 acquire942yq xqh c2cr a kinetic energy (in the abs2chc42qqyrx 9ence 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 tr ch2vx+u3 :fa distance 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 9qg qud8 (pasz2 /5fsiv-64sv yujm ,zstick. Find the electrical potential for the center of the mete6/js z,2f vzy qqsmdiuu-asg5 v(p84 9r 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 l /dns)pal-0 1y.s1p xjs/xidad7f .twan) w:-2.0-nC charge is at (3.0 m, 0). If the pote1slj: x)1)f/d/an- wsddw nx .t7i0paylsp.a ntial is taken to be zero at infinity, 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, lnt/)()7v w)i.d j3jqcww bvl uu;il, 0). If the potential is taken to be zero at infinity, what is the electric potential energy of a 1.0-nC charge at point (0,j,llj (iqbin; /3uw.) l uvcd)wtv7) w 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, 04 5n ut9lvjssu-2jyoa:p,lo4) and a -2.0-nC charge is at (3.0 m, 0). If the potential isjl4yj u 2stap-louv9 4n,:o5s 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 ar 63e)/eiv2y9euvc7pmcz pa8v eqdk7(e placed at the corners of a rectangle of sides a and b. What is the potential at the center of the rea2ek id c)v7eze 79u3 /vpmceq (py86vctangle 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 onv9eaap/eoppqx ,+vx*f 5 .t/u a side. Charges of +4.0 mC are placed in two diagonally opposite corners. In the other two corners are placed charges of xf/*te.ou, 5 vvxae/pq9 p ap++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 (charge d0*x hr9cv6gv +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 cof--usnu/ uf.mius;d nbrw( 00rners of an equilateral triangle of siu/uw(-f;f-m 0uuss 0n.rb dinde 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 wh,5uol;w .p *p5:rjgzt4zj0clrx.d o gen it is charged to 100 V:5po,ujl z zp dr0gowlxr5j4;..c gt* ?

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60#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate cap) 0b7k,7susbqa xzcw *acitor 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 capasqvs/ u24tvu0s/g;ti1.1ta dl8 naadcitor is filled with air, and the plates are separated by 0.050 mm. If the capacitance 0vug21ts8 /;d/4a.sdnsva1 tiqtu a l 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 cap yzl(zk*u+ck0 acitor 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 capaci;emcekvizl+ .7mrc 2;tor 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 field between z2;mriv 7 e;ec+km.lc 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. After the battery j y: t0wqo( vl63pjfik)5gnf;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 ft5o q6nf iwkv:;(0gjjl3) ype 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 storu1.fxwf rm7 xx2+vng4 ed in the ca 7wg.mr12xvxnx+ffu 4pacitor?

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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 b+/cu z4z+rul5spm2n.la s:c stored in the capacrzmnzlcu2++u.csp5:s / b 4 laitor?

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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 whs +4lyd euwhb26(0m9qt.dboqen it is connected to a 12.0-V battery. How much work was done in charging this co (mld924db 0u qybqe6t+hsw.apacitor?

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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 orrc(qp st ;2hqa( 15nthat 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 capari:yh.lq7 n( hcitor 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 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 cg c,s;bla /4uconsists 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 capaci97/ v0d(.sz0xc/i xmgi enjpctor 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 capacitd pxrfd8s+:4gqt64 kx or 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 construct;5 snruo.wv 9ybu9l6k ed 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 sn9wndd(7)auand 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 capacitance of the capacitor after the slab is insernswud) da (7n9ted?

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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 -ku uso-7nwr-ajsv.evx3 a 5.50-V battery and becomes fully charged. The battery is removed and a slab of dielectric that co e3vsu7.ova a.js-u nwk -5xr-mpletely 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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