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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 vector?z, l).lrl*rly

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2#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  One joule per coulomi ocg(w-l. ml0b 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 insulated from i.t7g6:+ mxqsji. v9adefe; mtheir surroundings. Object A has a net charge of excess electrons. Object B is grounded. Which object is at a higher pote ge ;qe fjvm.a9tm:6+xdis.i7ntial?

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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 v)rnqztcgp; f6,55 vx 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 opposite to )9bg9ve rhksbqyti1z gh-8 xw(r2 j63the 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 plahd9+.c:haxvnp0 rv 4xced 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 frlrkko/ /s y;*ih7z;ozhhk/ 0rom rest to a speed v by a 500 V potential difference. If the potential difference is changed to 2000 V, what will the new speehk7 hls/y*h z/i/rr0;o;kozk d 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 to asjto+0owi dblvf742c6h 6 gia.

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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 q(w cz ae,m2)ualong an equipotential surface zuw),mq ac(2e.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface on ji2cd x5,tasu59.smust 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 eqdqnf-bv85 e,bual to that on the electron as a result o dv85q ,ebfn-bf moving through a potential 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 unit ofjvc1(i8r6 ded/f l0 4pc fkrp*y d-:oj

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13#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  One electron-volt corresponfxux(37 bz;,yz vnry1 ds 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 m from a posit36:x+mu exhmiv ,u/qjive point charge is 100 V. What is the absoluti jme+x 3/v:mh6 q,uuxe 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 net9/i ,6swqi5koh(mz sgative point charge is -100 V. What soziw(,/t 6hm kiq9 s5is 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 - f :bxpp,84f,oen qfcV 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 e-f8b,f,p4 xoqc f:npeach 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 v(tc xpde .w+j;2(y zkcharge of +Q is located at one of the square's corners. What is the absolute pot(dcw;+yeptz j k (xv2.ential 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 0brg/vrf8jg5pth p1 .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 wl2stoa;do7 z;)d5gp.eu /xvis 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 capacito ; nsjzc(3jp-nrs are identical in every respect except that one has twice the plate area of the other. If the smaller capacitor has capacitance C, the larger on; cnj sn(3-pzje 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 Ccdi +hqs 9/x 6jce2:kb9o 8pzq. If the area of the plates is doubled and the distance between the plates is halved, what is ehi8zqso+ 2:9bdxkc9 6 pcq/jthe 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 then is remov : g 3cqx;qa,gzv0rv3)vx(j qwed. The plates are immediately pulled apart. (With the battery disconnected, the amount of charge on the plates remains constant.) What happens 3r j)(g xqvqz;aqwvvx: 30c g,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 betwee -:40u 0qlghzdohaf j- ,3msbon the plates of a given capacitor is weakened, the capacitanc0qduo0g hal3-jh:-ozf b4 s,me 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 capacitt xg3f e5+1drfrw*o .ior are maintained with constant voltage by a battery as they are pulled apart. During this process, the a 3f+g ior15fxrw*d e.tmount 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 caps k(0*lax *abcacitor are maintained with constant voltage by a battery as they are pulled apart. What happens to the strength of the electric fie*cl* b0xk a(asld 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 dielectric material between the plates of np5vtff nibq2u*le;l1gn, . 9a cap. 9ib1;e vpntqu*5l,lfngnf2acitor.
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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 ofd1*dbaz2 b7no a capacitor. What happens to t7oabdb*n1 d2z 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 papeg y;u(iry) 9sir is placed between the plates of a capacitor holding a fixed chag (;r)9yyuisirge. 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+ o y ro,q3aidq9yq;p5o;h+m e and becomes fully charged. The capacitor is then disconnected, and the separation between the plates is increased in such a way qido,ay3;+5 qrq;he9+omy op 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 constant charge causl9g-x+3yhr g1 oh. baoes the energy stored in that b9r31oh ay h-l.xg+gocapacitor 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 theegv)ryl y +(iob9 .j0cwk4v s* energy stored in that capa. gcvo4)ily +0 v(rkywbe*9j scitor 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 6h :irc+0a qk hfpi1:kve8ik 9A to point B. What is t 1kkp eq i cihf+rk6ih:a08:v9he 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 electron0d 9mhhx 4qw ofrr.6c* /tp*xl from point A, where the potential is -50 V, to point B, where the potentimhlx 9tf6cdpx/* wqh*r ro04.al 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 through an electric potential differ+r wk/kl73 otdt8rtz7 ence of 500 V. Wh7 /+8tkrtw37otkdlr zat 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 accel * gq3qo:g9 4heaixb2zerated through an electric potential difference of 500 V. What is the speed of *a 3 g4eqx:ogbq2hi9zthe 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 differsnysq +j2gxk;m + j2.qence of 1200 V. What mxn22;q.jsj+qg ksy+ 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 d8 r ti39gnm78tuxuhr5d jvq+ za)5u v;o 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 difference of 500 v3g 7 mt1pc:hcV. What is the velocitygcp7: 1 cvh3tm 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 2u jctu g4f 1mngc14q+charge of 20 mC. The object is accelerated from rest through a qjccm +ug141fngt4 u2 potential difference, 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 mainx 69lpzpe 9+m1h qji5ktains the electrical potential difference between two parallel metal plates separa h6qpxli9p5 ejzkm+91ted by 1.0 mm. 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,a 80hdcm7ssnt2/rg., zofg k7 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, what is the potential r/c8 s g0772z ns,ogmtah.kdfat 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 to4 77zg2 w xl:se7lzdjiward the east. If the voltage measured relative to ground at a given point is 80 V, what is the voltage at a point 1.0 m direilj742g77wdze :zs xlctly 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 ofb61kxerx5re,hr -j9 i magnitude 3.0 V/m. What is the change in kinetic energy of xeh9r,rrk xi e1j 5-6bthe 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 connectedw6 xkqtg/o+ dmou:r1 , 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 1.50tgmku1xdow6 /r+qo,: 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 o*d: q6 n3zu sexxwv;*12-V battery. An electron released from rest at a location 0.10 m from the negative plate. When z ou63vexx*n *qsw:;dthe 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,/gqj0a h8n7r,9vs ;** ufdeb , 9eulur.nspdk are connected to a 12-V battery. An electron released from rest at a location 0.10 m from the negative pbnu l/ 7.*up u ngjf,req9s; vadhks*90r ,d8elate. 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 50r(zex.iz5ak:5 vr+g t N/C directed toward the east. If the voltage measured relative to ground at a given point in the fie(r5vg x5r+k:z a .zteild 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 56 av hhj+wjz 8n 6wt8-uv8cltN/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 voltag ht8lvc-5z6 + ww n86jhu8vatje 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 pbzw7wm8nq):r7r hr2y; p qq(cf:bz3potential difference of 12 V, it will acquire a kine(37);8bwbqfm2n hqr r7pprqzz: wc:ytic energy (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 potentiajj++,p t r+ioxl at a 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 th l-y1xjty)f ,cw,8n x(qqp/ /n-uurxf e ends of a meter stick. Find the electrical potential for the center of the meter stickynt,p -r)xf f/ /wx(,-u1lyjnuc8q xq.

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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 chargehlgw1o 4watilo n37s(cf(*fo7 6s- ln is at (3.0 m, 0). If the potential is ta(4s*l ils(f7 7fco6 wwnlgoon1t- 3ha ken 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, 9/bts cxbvopi k(9y/ ip6;wk80) 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 charo9t8pbixk/s i9b6;kv c p(wy /ge 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 -2.0-5tkm;5 mfsi2yt4 j s8knC charge 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 point (0, 4m mkj854t stfi25k ys;.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 ar76.pdr9 zxst xlyn ip n61i d-bl00-vje placed at the corners of a rectangle of sides a and b. What tn jp066ns dlx.zrl0 -7ivd by19x-ipis 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 6qjq jzxbi k(l 703t(dopposite corners. In the other two corners are placed charges of +3.0 mC and -3.0 mC. What is the absolute potential k6(qq7l(0dijz3jbxt 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, mass 0o ;*cpof8mc8kd /);pplc pg k$6.64 \times 10^{-27} \; kg$) 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 thr emvxyo uzj ea4emn:3;-q,oun/d 9, zo 7h2:tgee charges, each of 2.0 mC, at the corners of an equilateral triangle of n2o/,vxzg ::a9 o3menezdqhe y4t m, j7-;uouside 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 ikave8()ji ,k4ak55gpg1 n vust is charged to 10ijp(8e5a,v4 )a 15gsknvgukk 0 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 capacito4s l96ng do8fir 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 sefbf6ota u96yv4ll- g9 z,je)oparated by 0.050 mm. If the capacitance is 17.3 pF, what is the plate areaot vyfu)alz6j9l of9ge- b 4,6?

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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 bess.8a8(gvb j9h ,pj 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 posf+fsazfa 4*aw.*no u7lykt f :u0rk di482.ztential difference between the plates is 20 t*alf.:n 7uz4.zd+ ws02 fouk8*kyifa 4rsfa00 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 thwp:pu/t; q ahl*5c(jke 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 du/*ajq c;:t ulp5kph(wring 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/sl73 tnt.f/,h1x a1chycpq g a 15 mF capacitor. How much energy is stored in thep7. 1,1ats/ htqc3yx glhcfn/ 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.c (xqyze x::6mxdz/ +y What is the energy stored in the capacitor?/ecmy dxx+::y (zz q6x

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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 o m5el4b+(a vuhzdf i48e6j/kan *5nrxnto the plates of a capacitor when it is connected to a 12.0-V battery. How mb evxu 4 hmnj8/+kd *fanz(5456ilareuch 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 chxaf6 ten6s: )parged 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 a5v:gk*.mf z*k 47 qrybwwfc8erea $1.5 \times 10^{-4} \; m^{2}$ 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 ;y0*py6brqx iconsists 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 aoo k.+vixg*8ce: n9c,q 7sfdplates 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 plate a8lh*mp;xw (y hrea 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 c99(s)r j e-wzl utk7auonstructed 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-f3e7)h nfjbp 1V battery and becomes fully charged. The battery is removed and a slab of dielectric that completely fills the space between the platej he)ff p1n73bs 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 batzt2 *3 dhw,z y1hv,vql)x 6,t +przwbttery and becomes fully charged. The battery is removed and a b+zz,t,h3xt*dh 2w 1pqv)tzr6l w,yv 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 across the capacitor's plates after the slab is inserted?

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