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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 noje3an8g(3d 29uhq/wp ms f3kr. u k2ppt 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 a.2) ydlctm*se0h b i,szy86d, dhd2ou

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3#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two identical aluminssezo 0e 8u5r8um objects are insulated from their surroundings. Object A has a net charge of excess electrons. Objec5ss 8ere u08ozt 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 elec/td*9)iddb e btric 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 oppositrn3t;j7xc/tw- xbssdr 7f xc682* xske 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 pt3 wluh94bxs 4 5mxq*jlaced 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 accelerated from rest to a speed vlg y6o*atptc/(t+ -zz by a 500 V potential difference. If the potential difference is changed 6c(pyta-*lz /g+toz tto 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 the7s)nzlqk 0zt .:/ k ku3mprtfeh22c wa:wtk05 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 tq-782o0ynb c /wc bbwho point B along an equipotential surface.7/owynq-w b b8c2ch0b

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface must be haecksgo5 im h; 2g.dr3eg8 :5:ko:xj

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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 elecu5,f(wni i- w wbl:k8 8):pnnkkey usf6zf:v+tron as a result of moving through a potenufn vw::6-)n8+ knbpz :kifk5 ,(e fw8suywlitial 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 a uning6lympnrf: )btb 0r5l+43 ugt 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 cor .t-dugyyj7wlq6 -h,yresponds 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 dk;uzk9s5p 213jszae8 8 65raenkuv re istance of 2.0 m from a positive point charge is 100 V. Wha5pv98ze r2 zkak3 5us; ku8s6ej1ne art is the 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 distancegnohbtw4+ 6t /5orm7)tvy o-e of 2.0 m from a negative point charge is -100 V. What is the absolute potential 4.0 m away fotow/ -7etg5nbvy )6t4hm ro+rom 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 j6,ysap3g*p;6 pbg oy /js d-3gj1nzxis 3.0 V when a charge of +Q is located at one of the square's corne/y -a z6jjs g1djbn3,sp6p;go3ygxp *rs. 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 potentibzj b )o6eq,96u xo07d h*ei mo9refg;al at the center of a square 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 c ohjrz6 oefdobmgeei*9)b,7u0 6xq9; enter 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 con3 paq;o2t;w- jlef1o-pz5 hqzsist 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 is1i6na7hm8p dm 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 ,xg)5u)cxi cg one has twice the plate area of the other. If the smaller capacitor has capacitance C, the larger one haxuc5gxig )),cs 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 od8ap r +)jn3 kr,13giqx( mqacf the plates is doubled and the distance b+8,agxkqp)qrcdji 3n 13ar m( etween the plates 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 capacia; xrezen3;42udob l- tor fully and then is removed. The plates are immediately pulled apart. (With t42zb-u xa e; 3e;drolnhe 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 weakenpod(vy m -m;: 7n86drrupx3qzed, the capacitance of that capacitor3 uvp7rdmpd: -y;rno z(qmx 86

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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 maintainep m4o a8k:d+aid with constant voltage by a battery as they are pulled apart. During this process, the amountiakm4d:a8 po+ 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 capacitor are maintainedtyjtb8s b.29 uc09f yx with constant voltage by a battery as they are pulled apart. What happens to the strength of the electric field during this proce092b. t9yfsx8j bcyut ss?

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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 between thdzw:8g*xe0a0lr+* 1p hkq e nxe plates of a cap**dnwlpazqrkx h+ e008:g xe1acitor.
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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 plao3 bg9xr;1 cja(g2ljt( q iw8bced between the plates of a capacitor. What happens to the capacitajw;(i 819xlqr j3tbcog 2bg (ance?

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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 capacitqg+4dt u gqa*0or holding a fixed charge. What happens to the electric field between the pla g 4dt+0quqg*ates?

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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 be5g3m jb kxno. pe;r3.15rxsbfcomes fully charged. The capacitor is then disconnected, anderbj3r. snfpgx51 5ox; . 3kbm 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 holdingagu;d *wc b,d(cqj3e5 a constant charge causes the energy stored in that capacitor gq;*cdew baj 3,u(d 5cto

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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 capaa-8 fnzz s(3ltfp. cn3citor causes the energy stored in that capacitor s f8ltzzna.(n3 f3p-c 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 B. Whw e6;z:t kt :n-dgv2;z;hcbai at is the potential difference between points A and;2 -;h a:b6w zge: czvnit;dkt 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 mw 6jliuj*b4u+ oving an electron from point A, where the potential is -50 V, to point B, where the potential is +50 V, is64j b+uu*iwj l

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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 acceleryp*d m 285bwduated through an electric potential difference of 500 V. What is the kineticwmp ub8 2ddy5* 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, ish:)vhhfp 2cc5vfkp t8bl,p/ 0 accelerated through an electric potential difference of 500 Vcpkt5/p2vvfhph)b:0, chf8l . 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 ofxr.fgvg*, n-k i+dwp 2 1200 V. What speed does it ,ivg+p *2n.d gwk f-xracquire?

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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 z.v -jae6,ka,y-yytl.0 V 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 differen v : ,j7qa(ygqmou*l3gmo g-g7ce of 500 V. What is the velocg7qg, *-jamv73qmo(:yo uglg ity 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 obje7d f;2x(ian fghk;07v lm5bxxct is accelerated from rest through a potential difference, and afterward the ball is moving at 2.0 m/s. What is the magnitude of the potential difference72bi ;m5lvfdn(ka x0fx 7hg ;x?

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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 betw39t.t yzty i4geen two parallel metal plates separated by 1.0 mm. What is the electri3ytty. gz i94tc 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 magnitude of 500 V/m, is directed parallm* cbx8i8map) el to the +x axis. If the potential at x = 5.0 m*p i8a m)xbc8m 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 towardlt mfy6tk15j6w js20g the east. If the volt5ty61f 0jstk2j gw6mlage 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)8 gshnn0gc mor:p,)1f n:rf z along the direction of an electric field of magnitude 3.0 V/m. What is the chanpo1fg hrz:mnn)fc:0 g rsn ,)8ge 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 cj;3 c wqu8d .)ckj5i9czpm5n12-V battery. An electron released from rest at a ;38jp d nwc)5zmu5i. c ckj9cqlocation 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, separate;ke d nngwy(f2v5z7 ;nd by 0.20 m, are connected to a 12-V battery. An electron released fronvwe 5g ;kn(yfz7;dn2m 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 connected to a 12-V r5lnhqt9rd9 z /7,g ovbattery. 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 rqdg 9,95 7lh/zrovntis 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 electriz4um+ p. 4 uuweu6a,tqr +gy(ac field of 50 N/C directed toward the east. If the voltage measured relative to ground at a given poi(m tuz4 u+., y64w+auurgaeq pnt 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 field of 50 N/C directed toward the easy/ sq )set7ex1t. If the voltage measured relat1 s/)yqs7 teexive 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 acquire r va.vmrq2 jp;l m,0xmnr hk+am-.,4ha kinetic energy (in the absence of frictk hm,vrjpn+a0q -lm.hv,r m 2xra4;m. ion) 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 distancee- ,zn7 hvajn* 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 th j,yde,b 7)m .0mivdan93t rwye ends of a meter stick. Find the electrical potential for the center of t0j7 miyw d yd.9amtbvne3r, ,)he 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 (3.0 m, 0). If the potel3ri:jeh.j: j4. f gykntial is taken to be zero at infinity, what is the j re 4 j..j3:glyhf:ikelectric 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)hy p;mp5r q43w and 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 a 1.0-nC charge at point (0, 4.wqh 4;yp3 5mpr0 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)y74au.,m u rgd)-uety and a -2.0-nC charge is at (3.0 m, 0). If the potential is taken to be zero at infinity,r td)-yue mg. ,yu47au 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 co;.3.rr18+uloml1qkmr-e rkx5wi b m krners of a rectangle of sides a and b. - lm1 em+rw8r.k1l;kx35rkm oqb uri. 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 mC are placed in two diagonally n k97ati3 +fz,:tca ffopposite corners. In the other two corners are placed charges of +3.0 mC and -3.0 mC. What is the absolute f+3zt:nat9ia7kcff , 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 +2e, majr9 f pib( gsobbmlevnw2*75ae- :wf69ne.)w ss $6.64 \times 10^{-27} \; kg$) 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 nqy; jf,8)dcar a21m pqecessary to place three charges, each of 2.0 mC, at the corners of an equilateraq c);8m,a12dpjyq fa rl 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 plat 6s jlvkr3zmzn00cf o x ec1kf*6h9t.eo1d i/(es of a 2.0-mF capacitor when it is charged to 10 3o1*. siz0lk6xto fm6 h ve9cjcz(k0en1/df r0 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 capax8ql mx zc p ;zbx8,1-uy+dr2qcitor 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 capacitor is filled with air, and the plates are x7q0. u .cdih :nz0 sbf+fm,kjseparated by 0.050 mm. If the capacit0f7h,dsqz i +mcfxj0nbuk :.. ance 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 capacitor has plates ofj5ies-a/ 6m hij ya:gj .e/nbwm+4/ udz*in )n 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 capa 4fxx1bw4d jj0citor has a plate separation of 5.0 cm. If the potential difference between t1j0 wfxbxd 4j4he 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 across a 100-V battery. After the batt;q/:vdkst 7 ilotz ;;yery fully charges the capacitor, the capacvoty ;i; 7t lsk:dz;q/itor 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 y.bvuwe *+x;6b ph0xkstored in the capacitor?h;y xkbx6ub w .0e*+vp

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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 zgciw(l6nhwky 86jt p)o)- 2l15 mF capacitor. What is the energy stored in the capaclplkw c( g6wh2o yj8i)) t6z-nitor?

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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 wv7hafbz0he(s ,px7t8b+u q)lh.,ed of a capacitor when it is connected to a 12.0-V battery. How much work was done in charging th,)xhvh7ztu0bd(7sa fb. 8e+ lwe,pqhis 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 (3i7b2zcl akzso 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 8 8 v*,yzcexogp1x a8cof 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 consists of plates g2xpc .iug.xorx1d:, 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 consists9v is. xed)vw- 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 plu4qpzan. g(sdhx7 (:d gze04;:4woobm d/ve jate 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 areaceb 6c *:.kqmovgz;+l 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 chargexi;.swkbf4x8 d. The battery is removed ands.wfki8x; bx4 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 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 chn+etlhk : ebti92rs( 2arged. The battery is removed and a slab of dielectric that completely fills the space between the plates is inser2elts9t h: kn(ib+e2rted. 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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