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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 followiu.1p q28yrzak ng 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 itpou4j e,:y ,i4fzffx l7k5/cs a

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3#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two identical alumint(jp62rizt jgj( 0kt5um objects are insulated from their surroundings. Object A has a net charge of excess electrontg6 (zkipj ttj2(rj 05s. 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( l 9w5liyp+y0 fq7igd 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 k)36uenwl)w)cjc8 zi0:ge24wh rjxw in a direction 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 cond8jta1t *fx7 evzg2m0+3y7d r.bua tvhucting 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 v by a 500 V potu oa788yq q0mfential difference. If the7qmou0aq88 yf 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 the same potential is r y;/t x- zh7l7ua0k2 xkip ab(rm6kcv*eferred 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 isxu 1w7/yw78vs m*oebx moved from point A to point B along an equipotential surface8 /e 7voww7y xbsx1*mu.

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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 be2g c2*r, 7;jvz(g utbocuv0re

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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 equa7u dp,4(qzcu yl to that on the electron aszy4qdupu ( c,7 a result of 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 a1:up f8m)vyfzlqhcs1s/padtl j, hk 8 ,:(zz( unit 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 co,xptha/yh)6f z 7oob1v8v i(irresponds 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 r.hwc8v:vrpre.z w hw/n29l0 2.0 m from a positive point charge is 100 V. What is the absolute potential 4.0 rwwvh802ncr. lw9r z.:phv e/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 od u;;tcc+ul dn1 b 01*oljh(ois -100 V. What is the absolute potential 4.0oul1ndoc o;bj cl*0+t(h u1d; 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-t 5 :y 8ikbpxmxasan46cu1 4f exact 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 ce85c4kpxm:ubn -s4y i taf6 ax1nter 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 a9grk)zx 380)td spalo3z 6cc y charge of +Q is located at one of the square's corners. What is the absolute potential at the3) )9y aktosr zlc6p g083zdxc 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 ofpdpxnpvl hi3uk3yy0yve80* g9 w3 m+17kgy/d 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 volt3xr ;c ut5(*pawh ty3p 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 excepo bfh*h c:n/pf6:a6qnt that one has twice the plate areancph a:6/ 6oqfnb* :hf 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 oq7) ;7h pwxc rq/-bvexf the plates is doubled and the distance between thexqr7 h;p)wexqvbc7 - / 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 capacitq 6h81lpdd3r,207xz1 sbwg*suqp 8r. fr rbifor fully and then is removed. The plates are immediatelyp s 1i r7*bps3d8 w8qfx.dz l1b2h r,ru0frq6g pulled apart. (With the 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 p46,djm: ya c,t k3ml gyizoc,w) 2hu;of a given capacitor is weakened, the capacitance of th luy;),mw3 g:k6m2p4yiztjhc , ,odacat 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 capa(c.40 oatk w-)5kt0kfo iibt fcitor are maintained with constant voltage by a battery as they are pulled apart. During this process, the amount of cha0ikbk(0o -i w4f5tt.ca fko)t rge 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 maintained with constant voltm ngve;jkb;hjnv da49;7:( osage by a battery as they are pulled apart. What happens to the strength of thed(abj;hokjs; n974e :g;vm vn 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 dielectric material bemm ypf 3nbw t/rp7 rh/)5+c8nptween the plates of a capacitor.p mt7 /8 )wrn5+/prmfbc3hynp
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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 8.fm8q6 eu2rzuq d s3hgau0)b paper is placed between the plates of a capacitor. What happens to the capacitance?hs rb 3u.8qmq0d fge6u2z) 8ua

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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 +zz ob;ua1-c gthe plates of a capacitor holding a fixed charge. What g;a + b-oc1zuzhappens 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 avptwtk / i60q7nd becomes fully charged. The capacitor is then disconnected, and the separation betwt i/7vw0q pkt6een 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 holding a constant cha:qrqu,y h2vg/rge causes the enehv/2gy qu:r,qrgy stored 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 capac0q2 lx o;jb9ccitor causes the energy stored in that ca0c2oq xl;cj9bpacitor 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 chagm86xegqtq39 .0jvd 6 j,vns : r.mjezrge from point A to point B. What is the potential difference between point 6zjveqgs jqxm8 g.m j:tv,rde0n.936 s 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 movig9bb w7(0eovw 4q yb1jng an electron from point A, where the potential is -50 V, to point B, where the potential is +50 V,q0gb yw(e owbj9v41b7 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, xsu5mk2m;u74 dy: xng is accelerated through an electric potential difference of 500 V. What is the kinetic energy of the proto 5 ;my2nxud m:s4xugk7n?

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35#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A proton, initially s1df3pyz*mf23 hj e01l6woiuvao1 c0at rest, is accelerated through an electric potential difference ofhav i110 oje1 3s p2z3of cld*0fm6wyu 500 V. 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 differen4 426vvxzbjuzce of 1200 V. What speed does it acquz6bx j4vv4uz2ire?

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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 movingbu11o1p j y fsrw7u7p- $8.5 \times 10^{18} \; electrons$?

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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 dinpz3 pfvz6jkeu:t0+ 5fference of 500 V. What is the velocu ep+5nk6 z3ftz0j:pvity 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 lumq*0s;1;ygpg/7i1te6k(jkmix . o x m 3dmbis accelerated from rest through a potential difference, ; 1 q( *ukx ;gt/p si36kxiebg7.0om 1mjldmymand 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 maintains2t/3qxm lu 4gu the electrical potential difference between two parallel metal plates separated by 1.0 mm. What is the electric field between the plate/q 23gu xtlmu4s?

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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 parallel d/ mon9r*5p5nr0w o rzto the +x axis. If the potential at x = 5.0 m is 2500 V, what is tn r r0*r5/9m5 wpodznohe 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 toward the e.6xld k tw*tv3ast. If the voltage measured relative to ground at a given point is 80 V, what is the voltage at a point 1.0 m directly west v 6k*xw3.l tdtof 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 magnitudl kma7m1/ *c wk6z5vm*44u hu hqekn3ne 3.0 V/m. What is the change in kinetic energy of the proton?3u6hha1q c uk/k5e4n7 nlwm *mv*km4z

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44#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two parallel plates, sepaxyp3n-rwd tve h;9d6*8 b wed7rated by 0.20 m, are 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 a distance 1.50 m from the positive plate, what is the potential difference between the initial andht7p;bw9d* 8- v6y3 deew xdrn 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 0.2 iapx 5ijn1sgnjq b7n 997(ic/0 m, are connected to a 12-V battery. An electron released from rest at a location 0.10 m from the negative plate. When the electri c9717nb5i p (sjqx/n9g iajnon 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.:s mphz0 ikm5;/fq dj2 s,eqxswk:4n9 20 m, are connected to a 12-V battery. An electron released from rest at a location 0.10 m from the negative plate. s; pk dsw4iz2q5 hmkn:9 xfm/0:esjq,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 electrwot:v1ait . xmk48m(k ic field 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 a8omtvt. : 4(mi1 xwkka 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 east. I.f k)umrye2l drn:i0)f the voltage measured relative to ground at a given point in the field is 80 V, what is the .):yeu)f lr2mk dir0n 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 potentiaw.ax oank :a5m2aduf e43o y56l difference of 12 V, it will acquire a kinetic energy (in the absence of frdaoy64:o m5k5aa3 a unexwf.2 iction) 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 6fele z +,cya.u.n nz7at 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 the endshimm:l;k,9m 7m-k dol of a meter stick. Find the electrical potential for the7,km kl mid- lh:om;9m 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 is 7 b5jtry7qfi 7wrn)i,at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the electric potentialrbwii,7rq t jy )7f75n 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 k5 qyn*0u9ahd at (3.0 m, 0). If the potential is taken to be zero at0 nu5qdkh 9*ya 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 charge is at (3.0 m, 0). If the pyxsg4qc:pqr-g p lt to .7l603otential is taken to be zero at infinity, what is the work required to bring a 1.0-nC charge from infinity to point (0, 4.0lqct6 -l3.y:pg 7go tx0sqpr4 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 t6- yr6udoo3; (4e bz sb9tg25b+swqb. sbjoivhe corners of a rectangle of sides a and b. What is th4esr26o;-yw3bbbj z +gi b6to9.(dbvsou qs5e 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. Chavtvj)- z3k;0 t-dh qsprges of +4.0 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 absolute potential in t-q3vt)ktj -vd0hpzs; he 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 (cjt00,gq7./tcf v3zo glt mw ljgs5o(2 harge +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 2.0bu 9pe.c1a .x1oj 1uiu mC, at the corners of an equilateral triangle of side 9pa uucjo1.ebui. 1x12.0 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 chaye ,vf:5dz/jklz *9cip- 2kq jpr2ch.rged to 1005v-rie2 ./ zpl*:j2hq,kp zy 9kdcjcf 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 plat2e2n rv,:poci es 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, xgakq e0: pa1yqx93x:and the plates are separated by 0.050 mm. If the capacixk q3091aa xepxg::y qtance 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 s,5kpa3zwr1 9* bppviof 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 sepuf26ez9p1a2zsa(vo u aration 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 fizsu2a6apvf 9e( u 2oz1eld 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. jgv23-v ognj4:x(z3x jxj( phAfter the battery fully charges the capacitor, the capacitor is immersed3 x jvvx-jn(3p24jxz o(hgj:g 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 muchubh w o,bvrp+4v7c-1q energy is stored in the capacitb7r-1 vv bphw4,q+uco or?

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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 50 vnxft*6xl fk ou1c::p*xcm energy stored in the capacit 1pftnxm:f* *x :6kocxu0c vl5or?

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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 when it is cg i1 e 3gck6ym-zksbqg+p0gw;f -- d)tonnected to a 12.0-V battery. How much work was done in charging twt b g1m-;iq-0kz 6gfy3s-g g+)ecp kdhis 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 that ja2s9acjj3 i ge.y8ldbi),+j 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 ar, l4yw4hsuafr:xka 1*ea $1.5 \times 10^{-4} \; m^{2}$ 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 of a .;zak:j xvh4i 0/wpgbrea $1.5 \times 10^{-4} \; m^{2}$ 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 plates of q+dxptff4 d8t 9qo* jll(vxwp-9k78i 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 constructeqffi/:uwo 5 6bdz t8d4d 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 construc+ v(oo ,os/7 (by;q)z euevypcted 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 connejdp xf9rs f1 v4z+**pncted to a 50-V battery and becomes fully charged. The battery is removed and a slab of dielectric that completely fills the space between the plates i fpds9 4+1nx*v*zjrfps 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 charged. m4 )jcmwis-iv;+8:wdi/v iq9spj n8 fThe battery is removed and a slab of dielectric that completely fills the space between the plates is inserted. If the dielectric has a dielectric co n+8s8idijip9w) cvj; m:fi4wqs/ - vmnstant of 5.0, what is the voltage across the capacitor's plates after the slab is inserted?

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