Physics Unit17: Electric Potential - 题库网 (tiku.one)

1#

Which of the followino;y)jjrge: 5oka tq, *g is not a vector?

A. electric force

B. electric field

C. electric potential

D. electric line of force

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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 aptr8vd v eri g-,n0x5aqm) +*p

A. newton.

B. volt.

C. electron-volt.

D. farad.

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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 t ;hfrj*9i6am-c2n t; zth:xwjheir surroundings. Object A hrtm-h;fc9jajt: h6;nxz w*2ias a net charge of excess electrons. Object B is grounded. Which object is at a higher potential?

A. Object A

B. Object B

C. Both are at the same potential.

D. cannot be determined without more information

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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 electric fielv.td; vj/y y:wn3 4jz9o s3fptd

A. its potential energy increases and its electric potential decreases.

B. its potential energy decreases and its electric potential increases.

C. its potential energy increases and its electric potential increases.

D. its potential energy decreases and its electric potential decreases.

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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:r ogaxs.m)uc ohuy+y8 9w6r/ a direction opposite to the electric field

A. its potential energy increases and its electric potential decreases.

B. its potential energy decreases and its electric potential increases.

C. its potential energy increases and its electric potential increases.

D. its potential energy decreases and its electric potential decreases.

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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 holn d8o 4fomg3g(,s a4cmlow conducting sphere. They

A. clump together on the sphere's outer surface.

B. clump together on the sphere's inner surface.

C. become uniformly distributed on the sphere's outer surface.

D. become uniformly distributed on the sphere's inner surface.

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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 spe(bv:x /i* vqvk uo.p;eed v by a 500 V potential difference. If the potential difference is changed to 2000 V, what will the new speed of the balle:quv ioxvb(pv k;.* / be?

A.

v

B.

2 v

C.

4 v

D.

16 v

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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 poi ivjzcvf0*vm7 8s-k-lnts are at the same potential is referred to as

A. a constant electric force surface.

B. a constant electric field surface.

C. an equipotential surface.

D. an equivoltage surface.

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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 equipotentialug*v9 :lc/0i:a laz 1g yu*no0drwk6v surfacegkcglud*yrz1/ uvl w9a06n: i 0a:*ov.

A. The negative charge performs work in moving from point A to point B.

B. Work is required to move the negative charge from point A to point B.

C. Work is both required and performed in moving the negative charge from point A to point B.

D. No work is required to move the negative charge from point A to point B.

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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+5.f kxs9wmda be

A. parallel to the electric field at any point.

B. perpendicular to the electric field at any point.

C. does not exist if the electric field is not uniform.

D. can not exist if the electric field is too strong.

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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 cao 0 p30cq :8e,3dy* ijvg+ eg/*rhsa6mxi qkrarrying a charge equal to that on the electron as a result of moving through a potential difference of one volt is referrir v e6d, q c*:ikmgsa30ge qo0y 8+/xajp3*hred to as

A. a joule.

B. an electron-volt.

C. a proton-volt.

D. a coulomb.

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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 v9bdr7rx)/e5f-8clft ih gz/of

A. voltage.

B. current.

C. power.

D. energy.

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13#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

One electron-volt correspon0-hr5xyx8, (q;xtm/t (d*txpdbbv: k/ vwa m vds to

A.

8.0 \times 10^{- 20} J

.

B.

1.6 \times 10^{- 19} J

.

C.

9.5 \times 10^{- 17} J

.

D.

1.9 \times 10^{- 16} J

.

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14#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

The absolute potential a-f npa/vky;5 1z7pg srt a distance of 2.0 m from a positive point charge is 100 V. What is the absolute potential 4.0 m away from the same pspaz v rk5/-71ng yp;foint charge?

A.

25 V

B.

50 V

C.

200 V

D.

400 V

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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 n y: lew skt*;5(iuh .dsb3ws;(fyi3i uegative point charge is -100 V. What is the absolute potential 4.0 m sbystue(ls iiy33w h;;i:u.f(dk5 * waway from the same point charge?

A. -25 V

B. -50 V

C. -200 V

D. -400 V

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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 3.0b4hds*)tpu e 9 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 each of the other corners is also filbp4u td9es*)hled with a charge of +Q?

A. zero

B.

3.0 V

C.

9.0 V

D.

12 V

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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 centr-t4-6ae5q iu 3v f(a 8mcr 1*twupgjver 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'spqc-t6(at vvuw 8r r3eja4um15 gi -f* center when a second
charge of -Q is placed at one of the remaining corners?

A. zero

B.

3.0 V

C.

6.0 V

D.

9.0 V

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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 that ar: mmxms90y p4gu7,o,* fycjo le

A. equal in magnitude; opposite in sign.

B. equal in magnitude; both are negative.

C. equal in magnitude; both are positive.

D. unequal in magnitude; opposite in sign.

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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 )z( gl7jw8sz*ur5zvris a

A. joule.

B. electron-volt.

C. farad.

D. watt.

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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 ax4ddcp()bs(+ 4 q szenre identical in every respect except that one has twice the plate area of the other. If the smaller capacitor has cap4 bqspc dn4z d((xe+s)acitance C, the larger one has capacitance

A. C/2

B. C

C. 2C

D. 4C

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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 pla ;epmnxuhrg8 )w, ac h/bt)*;ttes is doubled and the distance between the pn 8huh a;)p, tr/;*mtcw)gbx elates is halved, what is the new capacitance?

A.

C / 4

B.

C / 2

C.

2 C

D.

4 C

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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 removed. Thmz8q4.-of h ioe plates are immediately pulled apart. (With the battery discoom h.i 8fo4q-znnected, the amount of charge on the plates remains constant.) What happens to the potential difference between the plates as they are being separated?

A. It increases.

B. It decreases.

C. It remains constant.

D. cannot be determined from the information given

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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 capa t 5dxg(+ xyje2x-vq1cm:ah ;--clx rkcitor is weakened, the cap v2ce15xlj;:xka+ym (g -d -hqc-xtrxacitance of that capacitor

A. increases.

B. decreases.

C. does not change.

D. cannot be determined from the information given

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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 paralcooe:y;eg9ewq6w ;j z 55 xwrwah)u*n+azw2 6 lel-plate capacitor are maintained with constant voltage by a battery as they aw cw)5;y u96zwnwerj*qxha6e+ oz2 ga:5eo ;wre pulled apart. During this process, the amount of charge on the plates must

A. increase.

B. decrease.

C. remain constant.

D. either increase or decrease. There is no way to tell from the information given.

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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 vb dsu;ai 2z+uy4z(u-n oltage by a battery as they are pulled apart. What happens to the strength of the elu izzyndu;ub 2+as -4(ectric field during this process?

A. It increases.

B. It decreases.

C. It remains constant.

D. cannot be determined from the information given

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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 plafqgz6v - sy6byv r8cie g2*-(etes of a capac yf8q (vge-g-ycres z2v*6 bi6itor.

该题自我估分: (必填) (满分:1.0分)

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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 placedup.mpxje +oq4 4 (-fat between the plates of a capacitor. What happe opxteapqm 4.(4 -uf+jns to the capacitance?

A. no change

B. becomes larger

C. becomes smaller

D. becomes infinite

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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 platu l5/(4io scbcas3db*es of a capacitor holding a fixed charge. What happens to the electric field between the pla ( 3si4/lbdcoba5su c*tes?

A. no change

B. becomes stronger

C. becomes weaker

D. reduces to zero

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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 connectedq.p u th3w d,v/ni:m1f to a battery and becomes fully charged. The capacitor is then disconnected, and the separation beht fd.p v 1q:w,3min/utween the plates is increased in such a way that no charge leaks off. The energy stored in this capacitor has

A. increased.

B. decreased.

C. not changed.

D. become zero.

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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 r:*e2boj9unv capacitor holding a constant charge causes the energy stored in that capacitor vj: eu92onb*r to

A. quadruple.

B. double.

C. decrease to one half.

D. decrease to one fourth.

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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 sics-ru c.ys 1d8j 9gg,tored in that capacitor1rid8,jus ygcs. c g-9 to

A. quadruple.

B. double.

C. reduce to one half.

D. reduce to one fourth.

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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 cp 1j ,vrr(gnt1harge from point A to point B. What is the potential difference between poijpnrv g,( tr11nts A and B?

A.

500 V

B.

50 V

C.

5.0 V

D.

0.50 V

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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 moving8zf e(.k9ntl n7s7xm o an electron from point A, where the potential is -50 V, to point B, wh xt.7 lnz8som9( f7enkere the potential is +50 V, is

A.

+ 1.6 \times 10^{- 17} J

.

B.

- 1.6 \times 10^{- 17} J

.

C. zero.

D. none of the given answers

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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 p/*ym.omu7cfv( z1kk9gvd)+h rkp2u through an electric potential difference ofhm yc f*u+vzd o(9p)7kpm1.2 kgr/ vuk 500 V. What is the kinetic energy of the proton?

A.

500 J

B.

8.0 \times 10^{- 17} J

C.

1.6 \times 10^{- 19} J

D. zero

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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 resvyzfm1. egao j2wz 76,t, is accelerated through an electric potential difference of 500 V. What is the speed of the protev.mw,z1yfz 2og76 jaon?

A.

2.2 \times 10^{5} m / s

B.

3.1 \times 10^{5} m / s

C.

9.6 \times 10^{10} m / s

D. zero

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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 tz 77rh,-a 7is1azemb ohrough a potential difference of 1200 V. What speed does ishma 7-o,ba 7z 17ezrit acquire?

A.

1.2 \times 10^{5} m / s

B.

2.4 \times 10^{5} m / s

C.

3.6 \times 10^{5} m / s

D.

4.8 \times 10^{5} m / s

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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 9.0wz1p6e;h:s(y y4ag xi V do in moving

8.5 \times 10^{18} e l e c t r o n s

?

A.

12 J

B.

7.7 J

C.

1.4 J

D.

1.1 J

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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 potentif uonwc:6 qazv(7e)z)+/yjb h al difference of 500 V. What is the velocity of the elecv f:wjo)nu e+ h /bc6)zay(zq7tron afterward?

A.

1.3 \times 10^{6} m / s

B.

2.6 \times 10^{6} m / s

C.

1.3 \times 10^{7} m / s

D.

2.6 \times 10^{7} m / s

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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 chargam tp*kgm. -q, kzh.1ze of 20 mC. The object 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 differe*mkh.gq1. a mz pk,t-znce?

A.

800 k V

B.

400 k V

C.

800 V

D.

400 V

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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 ;avvo(p0eilac 8 6v :w,;nd djdifference between two parallel metal plates separated by 1.0 mm. What is the ele;ao;8d,a v0 di:vje6ln pv (cwctric field between the plates?

A. 6.0 V/m

B. 600 V/m

C. 6000 V/m

D. zero

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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 direcx.-puin /a is::xm*a45w uh kzted parallel to the +x axis. If the potential at x = 5.0 m is 2500 V, what is the potential at x = 2.0 m? /haxausz:k in:u 5x4i.m-wp *

A. 500 V

B. 1000 V

C. 2000 V

D. 4000 V

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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 dir jaqie+ 6jh-*mected toward the east. If the voltage measured relative to ground at a given pointmq6j ha-+*j ie is 80 V, what is the voltage at a point 1.0 m directly west of that point?

A.

30 V

B.

50 V

C.

80 V

D.

130 V

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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 of6m0uq9zp be g3vmup)l3f8)fz e vv-s( an electric field of magnitude 3.0 V/m. What meu(zv8)-f3ml9p6 upvqz g v3 befs)0is the change in kinetic energy of the proton?

A.

4.8 \times 10^{- 20} J

B.

3.2 \times 10^{- 20} J

C.

1.6 \times 10^{- 20} J

D.

8.0 \times 10^{- 21} J

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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 bfdfkmt,aq-u1 jg7 ba e40v8c: y 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 the4d t-f8k:ju b,7v egqam01fca potential difference between the initial and final points?

A.

2.4 V

B.

3.0 V

C.

4.8 V

D.

6.0 V

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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, jy.vs c5) 1gfqbz7j e:h8j/lpare 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 0.050 m from the positive plate, how ) 5 qf .cyjzl8vgj/:p ehb71jsmuch kinetic energy does the electron gain?

A.

2.4 \times 10^{- 19} J

B.

4.8 \times 10^{- 19} J

C.

7.2 \times 10^{- 19} J

D.

9.6 \times 10^{- 19} J

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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. Anx2ukner 02( i,qeze y+ 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 thekqn(izrxe02+ u ,ey2e electron?

A.

5.0 \times 10^{5} m / s

B.

1.0 \times 10^{6} m / s

C.

5.0 \times 10^{6} m / s

D.

1.0 \times 10^{7} m / s

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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 9qv + emyy7/8 1nzdqo6 tewq4weast. 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 eew+y eq t9yo7z4 8mnq61vd/w qast of the point?

A.

15 V

B.

30 V

C.

90 V

D.

130 V

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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 towq f1+b6u6e- 0qink-j l5wwicoard the east. If the voltage mqi1 f wuqi 60eo+blkjc5w 6--neasured relative 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?

A. zero

B.

30 V

C.

50 V

D.

80 V

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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 ac5zp4/s0 q2hdqvmceg3quire a kinetic energy (in the absencep/0dm5zceq2q3sv hg 4 of friction) of

A. 3.0 eV

B. 6.0 eV

C. 12 eV

D. 24 eV

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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 dis* mk7fso9; px58yf xhatance of

5.0 \times 10^{- 10} m

from a nucleus of charge +50e?

A.

120 V

B.

140 V

C.

170 V

D.

210 V

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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 (vheu*y t*mx24 8. gdxa9nn/fr h op(2 re2mcbmeter stick. Find the electrical potentr2mn( 2 *eu(2hd * n4ycgm.foe brhxxa 9t/8pvial for the center of the meter stick.

A. zero

B.

2.70 \times 10^{4} V

C.

5.40 \times 10^{4} V

D.

1.08 \times 10^{5} V

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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 (n 4yo2l8u,:4vvfjky;2 roxj k3.0 m, 0). If the potential is taken to be zero at infinity, what is the e2jko:uvy f4lx, rkj4yno8v 2;lectric potential at point (0, 4.0 m)?

A.

15 V

B.

3.6 V

C.

11 V

D.

7.7 V

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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 c b lu. :5tlq fi6/a)nwg25nrybharge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the ele a/i rlunf56twqylg) bb5.:2 nctric potential energy of a 1.0-nC charge at point (0, 4.0 m)?

A.

1.5 \times 10^{- 8} J

B.

3.6 \times 10^{- 9} J

C.

1.1 \times 10^{- 8} J

D.

7.7 \times 10^{- 9} J

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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 6i8tc*roz5jz . erg2wjx6-cu-2.0-nC charge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the work required t6 j5 c.ez86r2t *jowrxu gzic-o bring a 1.0-nC charge from infinity to point (0, 4.0 m)?

A.

1.5 \times 10^{- 8} J

B.

3.6 \times 10^{- 9} J

C.

1.1 \times 10^{- 8} J

D.

7.7 \times 10^{- 9} J

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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 placegr:2 e4srr .1hssi9 wnd at the corners of a rectangle of sides a and b. What is the potential at the center of the rectangle if q = n14 rrsr2esh:w.is 9g2.0 mC, a = 3.0 cm, and b = 4.0 cm?

A.

1.3 \times 10^{6} V

B.

2.9 \times 10^{6} V

C.

3.5 \times 10^{6} V

D.

7.8 \times 10^{6} V

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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 opp 3:azdym c/.b*nwy3dg r)+v ldz63r5t1n mh tposite corners. In the other two corners are placed charges of +3.0 mC ah/+t5gr 3n*zp c y b6md).a3rz: t31vylmnwddnd -3.0 mC. What is the absolute potential in the square's center?

A.

1.0 \times 10^{4} V

B.

1.0 \times 10^{5} V

C.

1.0 \times 10^{6} V

D. infinite

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57#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

An alpha particle (chaf. 69g besoww+4jisd(rge +2e, mass

6.64 \times 10^{- 27} k g

) 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?

A.

2.3 \times 10^{5} m / s

B.

4.6 \times 10^{5} m / s

C.

2.3 \times 10^{6} m / s

D.

4.6 \times 10^{6} m / s

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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 wqvwl / 6h5i2si8.ofamC, at the corners of an equilateral triangle of side6hw 8 iqo2flvi.sw/a5 2.0 cm?

A.

4.5 J

B.

5.4 J

C.

6.7 J

D.

7.6 J

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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 ch(p 3qq +u.qvplarged to 100+ 3qlq.qp(puv V?

A.

50 m C

B.

100 m C

C.

150 m C

D.

200 m C

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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 of areaqp4hk hs-7q./ oh,qs(b nwq+m

0.50 m^{2}

separated by a distance of 2.0 mm. What is this capacitor's capacitance?

A.

250 F

B.

50 F

C.

2.2 \times 10^{- 9} F

D.

4.4 \times 10^{- 10} F

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61#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

A parallel-plate capacitolqtm h6+d c3e8r is filled with air, and the plates are separated by 0.050 mm. If the capacitance is 17.3 pF, what is the pl8+t q 3dcm6hleate area?

A.

4.9 \times 19^{- 5} m^{2}

B.

9.8 \times 10^{- 5} m^{2}

C.

2.4 \times 10^{- 4} m^{2}

D.

4.8 \times 10^{- 4} m^{2}

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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 ofb;kut2bwvm(s 5i 0u53ypp -x;g/r r pa9f:n xt 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?

A. 1200 N/C

B. 3000 N/C

C. 6000 N/C

D. 1500 N/C

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63#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

A parallel-plate capaz uejl,05 se n72xo/yecitor has a plate separation of 5.0 cm. If the potential difference between the plates is 2000 V, with the top plate at thexzu7jln2,ese oye/0 5 higher potential, what is the electric field between the plates?

A. 100 N/C upward

B. 100 N/C downward

C. 40000 N/C upward

D. 40000 N/C downward

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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 g 8om94gzffc/j;en1 a the 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 remai4mj z9g/1oncf ef ag;8ned connected during the process?

A.

1.2 m C

B.

1.7 m C

C.

2.1 m C

D.

2.5 m C

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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. H+dju ;ogmgu5nr46 acyj3.) moow much energy is stored in the capacitor?og.rd5m6cjm o uj+g4uy3)n;a

A.

120 J

B.

4.0 J

C.

240 m J

D.

120 m J

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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 tol0sjz ,j+2szuhz c0)g0gy zub (7g.bhe energy stored in the capacit7 usc0jyo z0js.(uzgb0)l b+,zh2ggzor?

A.

150 m J

B.

300 m J

C.

3.0 m J

D.

6.0 m J

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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 i -)yuvbya2 hp/t is connected to a 12.0-V battery. How much work was h apbv -/uy2)ydone in charging this capacitor?

A.

24.0 m J

B.

12.0 m J

C.

144 m J

D.

576 J

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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 chargq/nzha n qy5.1ed so that it stores

2.0 \times 10^{- 3} J

of energy, what is the voltage across it?

A.

5.0 V

B.

10 V

C.

15 V

D.

20 V

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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 cond,gm5 xl,t.qn( wq4 pcsists 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?

A.

1.3 \times 10^{- 15} F

B.

2.6 \times 10^{- 15} F

C.

1.3 \times 10^{- 12} F

D.

2.6 \times 10^{- 12} F

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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 2k:uo :h,irw hconsists 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?

A.

1.6 \times 10^{- 11} C

B.

3.2 \times 10^{- 11} C

C.

1.6 \times 10^{- 14} C

D.

3.2 \times 10^{- 14} C

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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 hant-xuly ,5 3area

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?

A.

12 V / m

B.

1.2 \times 10^{2} V / m

C.

1.2 \times 10^{3} V / m

D.

1.2 \times 10^{4} V / m

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72#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

A parallel-plate capadg s70nhwj8o)b1 *reo citor 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?

A.

0.21 m C

B.

0.42 m C

C.

0.63 m C

D.

0.84 m C

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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 cog4zxkkk/ abolax; d*vx(8 ,4onstructed 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?

A.

2.5 m J

B.

5.0 m J

C.

7.5 m J

D.

10 m J

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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 bagb.if-hj/ uaf 11 cpw9ttery and 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, wha 1j-abwgf. uipchf91/t is the capacitance of the capacitor after the slab is inserted?

A.

75 m F

B.

20 m F

C.

3.0 m F

D.

1.0 m F

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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 char65xxe9ax gw6 1i* ne h;7j xol/6pgnrdged. 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 across the capi6aowde57 6e;gx/j xg16ln9* xn xhrpacitor's plates after the slab is inserted?

A.

250 V

B.

10 V

C.

2.0 V

D.

0.75 V

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