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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 followi oywbtl)e2;ii2 08-mh 1hyk ewng is not 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 iv (x5dhiws*lje: )d *ds 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 obq;4;i qshak/txn mfvas1 57-p jects are insulated from their surroundings. Object A has a net charge of excess electrons. Obje x-;f7isa4/ nqhv; tms5qapk 1ct 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 directl w.df4gmm- 2uv88s mqb0ak.yg hfw-( ion 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 opmbrp f9c ex y-1qc096pposite 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 sphere. The )k xafr(sa9.ny

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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 froldynimk 0sd6f;9 c3 *em rest to a speed v by a 500 V potential d9 ndmy0*f ecs ;l3dki6ifference. If the potential 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 tn5p-gsx, rcjur2 +4bshe 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 equiuxet6k8f2+d 2 fzkm9d2py:nqpotential surfac869: dfkntk2xuq22p myd+ f eze.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surfac b, lln,x(z lco*or gp:+q)gy3e 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 czx0w 2sy l7bnq1dd:m-58 larx harge equal to that on the electron as a result of moving through a potential difference of one volt is ref qxym 8xd-:zb1dsr5lna0 2l7werred 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 unit5(h 6 .6xrd dm vqxr6rwf7gw1t 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 corr o*8,bzsbzr w1eee6i9spem3 )esponds 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 distancec;z ,:gdgzc,4 rc 1aom of 2.0 m from a positive point charge is 100 V. What is the absolute potential 4.0 m away fromc 4a; d:gzzr 1cmgo,,c 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 iw.6utvr4 k:j from a negative point charge is -100 V. What is the absolute potential 4.0 m ak :tuv6jr.4w iway 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 squa3. zy.bitn4sc re is 3.0 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 .zysc.b4n t 3ieach 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 a chbto5 ncqn+1+rarge of +Q is located at one of the square's corners. What is the absolute potential + 1tnrcnb5oq+ 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 kg w +2zofv4o/1 xzx rm-v2i*lcharges 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 6yo dj;2gvhzx3:jfb 3 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 are identical in every respect exce-fru6d mbtl+a(s7y6i xv;te;pt that one has twice the plate area of the other. If the smaller capacitor has capacitance C, the large x;lrbys(ft -7 a;id6+tmuve 6r 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 areap q 5iz);;smmrni e;dtw+,y 6z of the plates is doubled and the distance between the platese+qr6 n ;ip mt;d;zy5,)imwsz 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 a)5x b5i i59pd4uqs5st ev/jd xnd 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 difference5jsx)u4bsx5d i i 95d5 t/evpq 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, the c;kqlceahjevk6gy0 p;+ 1 g8 gjl(l)6p l10y8e j )cggvk+pe 6 lgja(q;lp;6khapacitance 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 constls2) dm obby/gem1 g26ant voltage by a battery as they are pulled apart. During thgmdg ymob/2)b2 1els6is 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 para:wwr -wi. h5nvllel-plate capacitor are maintained with constant voltage by a battery as they are pulled apart. What happens to the strength of the electric field durinh-vniww5rw :. g 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 a835 xrmo).e e)x 2/wyloh06iwu wia or dielectric material between the plates of a capa))5whyo2w3x8l ue 0 oeoxmawr/r .i6icitor.
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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 capa04-vjd 0j0rtzwu0 yg g,5jo bocitor. What happens to t 0 4,ujv 5gtjroodz0ywjb00g-he 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 x 1ikm5qj.hluox;9*pa capacitor holding a fixed charge. What happens to the electric field between the plates jqp;lo5xm9iukh x.*1 ?

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29#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capacitorhy x,fye (sj.:e vp88j is connected to a battery and becomes fully charged. The capacitor is the.j(se,8fe :jy yv p8xhn 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 holdiyk 5*mpm :jz(kng a constant charge causes the energy stm(*zmky5k:j pored 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 the energy stored in tha5fld1wz:q h (rt capl(rfhd :1qw5z acitor 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 ck d tfkz8a*vxp;tsw- :7s vb86harge from point A to point B. What is the potential differe*sf6d8 stkpv 8z v:bx-7k;t wance 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/+hz9 o9nzes.ua .xmf moving an electron from point A, where the potential is -50 V, to point B, wheref en/u.z xsa+zmh9.o9 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 througy;uyj3 g;aatg6r1 e*l h an electric potential difference of 500 V. What is the kinetic energy of thej;eu;6agy * tg1 ryl3a 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 electric 55 by+s.vrhsxb 1b3zmwz ( 9appotential difference of 500 Vz.zaxh5b3r ss5vmbybp ( 1+9w. What 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 difference of 1200 V. W4skg3it6,gv ey: qk i9hat speed: 4gy9i e 6qk,kg3svit 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 dopo*py3 (4p - f2yijtis 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 arbqp:t: m:n g-ccelerated through a potential difference of 500 V. What is the velocitt -r:pnmb gq::y 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 object is s58 q dsh+fh :t/uyzwg441idiaccelerated from rest through a potential difference, and afterward the ball is moving at 2.0 z+iy d qif5hh4:wt1 /ssgu4d8m/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 pot6nkk*aygr, to ;ro+h/7 byd)uential difference between two parallel metal plates separated by 1.0 mm. What is the electric field bety,rybkaod/ +);ukg*n6r h7 otween 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 magnitude of 2p n,xyi*h8*xe c dp7e500 V/m, is directed parallel to the +x axis. If the potential at x = 5.0 m is 2500 V, what is c2 *, xyi8ppdxenhe7* 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 direct vanvkh2/h3ih ns 0*g;6m/v kjed toward the east. If the voltage meas 0h 6k vi3k;mn2*va/j/hvs gnhured 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 tyv)k))c m:zh3w,swdt he direction of an electric field of magnitude 3.0 V/m. What is the change in kinetic energy of the pzc) h,v3y w)wktdm:) sroton?

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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, arer 2y a m)xez3oukp 9a,*0lf7zb connected to a 12-V battery. An electron released from rest at a locati azl,a0kre2y ofx3)* bu7pz9mon 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 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 connected to a mgv-drk0w9 hd ;q,1ad 6rg o)m12-V battery. An electron released from rest at ahmg) 6rdvoqr gw;,9ad-d0mk1 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 connected to a 12-V battery. Anp7m jw c+wtqt8;dzy+ 5 electron released from res; tytqjcpw5wz8m++d7t 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 field of 50 N/C directed toward the east. If b7ba9.lytl2*o dp ,ihaoba1 + ksu7z7 the voltage measured1 *b yb zus.2abpa oa+7ik7ht9l7ol,d 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(kj;j ln0v1 p.g:njf 9ieoau) field of 50 N/C directed toward the east. If the voltage measured relative. nal()fu9n:vj j poijke10g; 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 througmzt1hf p* 8 45oj zczjx58hrbc*rw9ws.c h ;9wh a potential difference of 12 V, it will acquire a kinetic ec*zhsxrwth p9 zj;* 5mf.b1zc8 c o5r4w8whj9nergy (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 s ,g0z1y-q ;wwd u-evnof $5.0 \times 10^{-10} \; m$ 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 nes --9 mou-cr-f 0kni*ov6vcthe electrical potentiviuc- 6-v9m f no-crneks0-o *al 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 7)bcu. r1bza t,r0g feis at (3.0 m, 0). If the potential is taken to be zero at infinit rzreb0fb 71c)gu a,.ty, 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) ano id:d(7)bapq 6h*xg3kukt c1d a -2.0-nC charge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the electric potential energy of bh)q76*ok tdi1u3 gapd(c:xka 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 chargeugkh0 t0v.tk8 is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the work required to bring a 1.0-nC charge from infinity to kkh800vt.g u tpoint (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 ch/pahvzf.,v0,c/04rg5 dp np )shibw harge +q are placed at the corners of a rectangle of sides a and b. What is the potential at the center of the rectaaghc0v,r/nf zp d b0h 4).hipw5vps ,/ngle 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.) a,: bbgtjg*l40qew l0 mC are placed in two diagonally opposite corners. In the other two corners are placed charges of +3.0 mC and -3.0 mC. What is the ab w)jgl, *4gbable0qt:solute 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 pf5 c/+vp3davq: nv 3t+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,gqw rr4 k/wby z)xa0z7v7tw)2 at the corners of an equilateral triangle of side 4qy2b)0tw ) gwwrav 7xrk 7z/z2.0 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 charged wlzxb-y4 w1j 4to 100 -1lwzyj b44xw 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 o chbadnh ck90a/n,d(j -iu);af 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,n mh d 2zzy50giaxa5m,8i;s ,8u(lnsn and the plates are separated by 0.050 mm. If the ;8i hxmzaa5n8,zml,5in ysgdsnu20( 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 capacitqn6c c9e1.;luu8vzo r or 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 b3upw82*d wtc 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 potentiawcpu8 d2w3bt*l, 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 connectga,n 1hsy+opz-6aac:yyr 5(dzn hy0 -ed across a 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 a 0-:ya+6ygnp d,sz5ha rconh -y( zy1battery, 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 pi8pjqk yh(1+kuid2.much energy is stored in the capacit1piyqipdk 82h( ku. +jor?

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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 :jwi *azf9z29wy da9j15 mF capacitor. What is the energy stored in the capacito a*ji9wyz2d9a :w9zf jr?

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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 773do*jvg(oaoy7 sg ozs fm28 the plates of a capacitor when it is connected to a 12.0-V battery. How much work was mz jgya8(2 sv37 s7og7*oofdodone 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 charged so tha0lnp03c.a cv lmm d1e o+7qg6tt 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 area 8u3g7z /z5 (u0xrdsgiyu *ipd $1.5 \times 10^{-4} \; m^{2}$ 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 plathk-4( ;mfkb ples 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 pla5l4oqje m5n-qn*)vquyh e9::yxh,yme :0uhktes 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 planoco w og563q*te 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 capacitordnj70 nf pzku 3ee-*r* 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 becomes fully chaujs c4j.w68lius: ii;rged. The battery is removed and a slab of dielectric that completely fills the space betlcwsj 4ij.u i8i;6u :sween 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 h64w rl/ oef pzp4uk*7fully 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 f/eohp44ruzp lk67w*across the capacitor's plates after the slab is inserted?

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