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

1#

Which of the following i6; e ytw ,6oafvnec44es 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 coulombfi6 z5qboz:)2;cj jyh is a

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 their surroundings. Ob2bx7 w m/mu. tbl7b4w4fgwekvd6;f3g;aak 3bject A has a net charge of excess electrons. Object B is grou 73.ugb4w3fm;gew7txd/bl ak a bbw k26vm4;f nded. 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 elect;4s xi( fh6bn ind7*)u m9vku-txy 7xvric 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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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 the eleizxq q0p(vantucw8f( ry,w )+* xr5m2ctric 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 hollow conducting sphere.68 dt/5txv3 3w 5igd hsvvk1ur/uf+kf 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 speed v by a d3y ;mvvv- pq48p rx)x1wrn7f 500 V potential difference. If the potential difference is changed to 2000 V, what will the nev-f)x7;rqn314d xpvym r8pw v w speed of the ball 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 pointsi3va0,p .xgr,zj l*r d 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 equipotenlqsptqos o.3ba -2l.b ziw5./tial surface.b/.5alt .so. 2i-lqwo3 sqzpb

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 be0v , zpjfir0c0

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 carrying a 6;z wftd2kfk+ gd:gs 0charge equal to that on the electron as a result of moving through a potential difference of one vo;26gt gdzk:skwd ff0 +lt is referred 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 ux (sa steb2l/:: ya2canit 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 corresph ,cfm b8)gmuxi1(d*l onds 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 at a di-k 7uvpphg. zwvy w2ul-w),*o stance of 2.0 m from a positive point charge is 100 V. What is the absolute potential 4.0 m away from the same p hlw-ou y )*uwg7pk2vpw-, vz.oint 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 w hz9 6+xlvivn ,)ue08p5+yifacs jd-m from a negative point charge is -100 V. What is the absolute potential 4.0 m away fr iva6fechpjn )wx 80,vd+ 9z is+ul-5yom 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 3.0 V when a charge o,bhu,-i,-a vqpyd c e7f +Q is located at one of the square's corners. What is the absolute potential at the square's center when each of th-cqb 7,uvd-y, he i,pae other corners is also filled 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 centejx297nog d(ze-iwpy4r of a square is 3.0 V when a charge of +Q is located at one of xy 2ojne97 4zw-gpd(i the square's corners. What is the absolute potential at the square's 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 consist5k4+y ,sexo: 4mnd spn of two charges that are

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 i5g. 72wrd(xlrs iv,*h*ljfo js 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 are ide -xlbpfo.w 1v3ntical in every respect except that one has twice the plate area of the other. If the smaller capacitor has capacitance C, the la.wxlvb 3- fpo1rger 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. sc6m2 y6u 1cbh If the area of the plates is doubled and the distance between the plates is halved,mu 1by6sc2h6c 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 paraln y;;t-;gkzr8 nsdqt a/kvk0ds1u-5 llel-plate capacitor fully and then is removed. The plates are immediately pulled apart. (With the battery disconnected, the amount of charge on the plates remains constant.) What happens to the potential difference bes1t8 vt- uka-ld;grz;n0ykq; /dskn5 tween 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 field1 yw* .pzd4ule between the plates of a given capacitor is weakened, the capacitance of that capaci1.y*el4u pzwd tor

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 parallel-plate capacitor are maintained with constant voltage d/rsx pv fk6)9c) z0 ys+b)gcmby a battery as they are pulled apart. During this process, the a/yrszcm))x +06vkd f p s9gc)bmount 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 main xq83 dlala;apr8, 9 .dif6ok 4qftr-ttained with constant voltage by a battery as they are pulled apart. What happens to th pa8q; txdk a9rq6ld3ft,4 i8forl.- ae strength of the electric 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 dieni l+bhflebb la(6+0.( bon f-lectric material between the plates of a capacib.b-blffl(+(e06n+b h o ailntor.

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 placed betwvz +2+hyn4+f0b6pag unsgh 4feen the plates of a capacitor. What happens to the capacit unzy sv+0p h+hna6g4+g4b2f fance?

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 plates of a capacite+ s,qzc35nz mor holding a fixed charge,s3 +ezm5cnqz. What happens to the electric field between the plates?

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 capacg8hp eo1edg (zto1md)(xu nl07 y4a(eitor is connected to a battery and becomes fully charged. The capacitor is then disconnected, and the separation between the plates is increased iy(o4tel dezo1g0p) e8h(x7 g ad1m(unn 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 capacitor holding a constant charge causes the ennfq-y p .5xvm)k3bdt,th(:oy whv zu :;bt3.wergy stored in that capa w 5:.mn,tbvoq3(v; -h:.h3bdypu twktxyfz )citor 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 gh41-rx sbn /ckiven capacitor causes the energy stored in that cr-k4 /x1nc hbsapacitor 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 charge from point A to point Bsgfw51o1)r xx0eh (vtdarvt8- 6 q :xt. What is the x6-r5:8e0w h1otd)1v (agr tt xsxqfvpotential difference between points 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 moving an electron from point A, where the p5icxkxs0o rh9.sc3i . o;o)kpotential is -50 V, to point B, where the potential 0539k .cocsri;i .k soxoh)xp 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 through an electr6a-j.p0hwq+t ewvzg /ic potential difference of 500 V. What is the kinetic energy o0wv q p-/g+ 6tewhaz.jf 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 rest, is accelerated througu ojanhid240 e g(tiy;*p1uu*h an electric potential differepuj0n ;ye(*gi4dthoa 2i *u u1nce of 500 V. What is the speed of the proton?

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 prozwf- yni,4pfp xq8//lton falls through a potential difference of 1200 V. What speed does wff4,lpiyz -qx//8np it 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 9.0 V do n*mvr7,ff v:2few8)j e qfn 1jin 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 throug ewv3 zncq(fp:b55aw, h a potential difference of 500 V. What is the velocity of t zqvbpe,:(wc5an 53 fwhe electron 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 charge of 20 mC. The object is aiz/vltp b9osm/xa z v(o70 1*eccelerated from rest through evmz107/ools9 /(aiz b v*xpt a potential difference, and afterward the ball is moving at 2.0 m/s. What is the magnitude of the potential difference?

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 electric55 vzj3ekkdo7al potential difference between two parallel metal plates separated by 1.0 vkoz5ke5 37jdmm. What is the electric 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/my:4e tq6lytz 3.sklo1, is directed parallel to the :4oltq y.l 16sekz y3t+x axis. If the potential at x = 5.0 m is 2500 V, what is the potential at x = 2.0 m?

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 d/ x)jb8k avf4wirected toward 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 direct b)vf4jaxw/k 8ly 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 of an elp)1za8anq lip 6:qd/ tectric field of magnitude 3.0 V/m. What is the change in kinetdipaq1 qa plz t8:n)/6ic 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 by 0.20 m, are co.*0cazc *6.eh8o x tkstdm-zsnnected to a 12-V battery. An electron released from rest at a location 0.10 m from the negative plate. When the electron arrixm z s80 6cackszoet*-..htd *ves at a distance 1.50 m from the positive plate, what is the 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, are connected47ssi)a)y wnfc 6oq.k to a 12-V battery. An electrons. qc6s7kf)) nyia4ow 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 much 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. k gqsw 77nq(ej+z4z e jcw+(g3An electron released from rest at a location 0.10 m from the negative plate. When the electron arrives at a distance 0.05q 7n szcewe jj3g4kwg7((z++q0 m from the positive plate, what is the speed of the 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 5p/ 6) r(e(,dj4iulwe g-jgk5p qbp;dv0 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 voltaugd( ) /4 6 pi lerdqvj(bpk5pwg;ej,-ge at a point 1.0 m directly east 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 ( qq6u 9qe/p7 ghpz8(rcyi9fqtoward the east. 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 mq7izcfqh/9 6g qe9p8 pryqu (( 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 acquiry q/ 3ucvm+ sf95i46d5hhv utbe a kinetic energy (in the absence of frictqichv9mvf y6 t /h+4d53u5bu sion) 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 distance of po,tojq81t(bpxm0e w8.,u p4 psmr + s

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 meter stick. Find lz.,x :xnp;ha the electrical potential for the center of the meter stick.;p,naxx l:zh .

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) an gr+r; +pohzg)1- j1fd;q 0qexnm5xetd 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 at pop0j1hg mq;f5g x1+eqdo); r- zrxn+teint (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 charge is at (3.0 m, 0). If the potu/pjqd tqb ahb/*,9h8,zsb3(fn vu1 lnx z7r /ential is taken to be zero at infinity, what is the electric potential eneb8nsd/xp*t/9,h7v3 zn b,lu h j1/fz bqqu( rargy 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 -p6s,hpc kz1*(8njoo g2.0-nC charge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the work required to bri *sk8(1zj 6ong,hoppcng 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 placed at the corne2r)yu08fxhrej35.xs ap394ud b vlaars of a rectangle of sides a and b. What is the potential at the cau5dx rh0e2 )xs4.af3ry8p3v9b luajenter of the rectangle if q = 2.0 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. Chargaj zdno (,b/g.n+ up;.nn.xew es of +4.0 mC are placed in two diagonally opposite corner d..wz.;nbxnna/+g(op,juen s. In the other two corners are placed charges of +3.0 mC and -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 (charge;;;x+pe 9luwzq iqi;c +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 ne 0iyju4a 7;) zvjvl/qlcessary to place three charges, each of 2.0 mC, at the corners of an equilateral trialvy)v0iq zu74/; la jjngle of side 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 whengov+7-h s stcj.f 6ks- it is charged to 100 6hs f-cvj+skto .sg-7 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 capacito/ :r8.0tgokcro0q hatgjth )b6g2-vf r has plates of area

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 capacitor is filled with air, and the platehrx zhe3xuq 5; dn(g41iavy.0s are separated by 0.050 mm. If the capacitance is 17.3 pF, what 1xh;z 0q e.dnia3gruxy45 hv(is the plate 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 capacie hc fj zaep (3o1+ivp/0-jcw).:zsoator 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?

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 capacitor has a plate separation of 5.0 cm. If the potenzo(l+jf m:l:d tial differefd o:+:ll(mz jnce between the plates is 2000 V, with the top plate at the 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 lbyb *b1b)/csbattery. After the battery fully charges the capacitor, the capacitor is immersed in transformer oil (dielectrcb sl/* bbb1)yic constant = 4.5). How much additional charge flows from the battery, which remained 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. /)xcj*:w1p okdg dfhun 32oy: How much energy is stored in the capacito n1wxou cd2*gfk: o:)/ypdhj3r?

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 in6nsj/xj b (ws52s. pns the energy stored in the capacitoxn2w5ps.s( sn/ jn6bj r?

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 capacit7pm0dwb2j5i z or when it is connected to a 12.0-V battery. How much work was done in chargingw i2j5 dp0mz7b 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 choad2kci53 (b farged 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 conjfkb.w(8/eissy - b +usists 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 consists of plates of arb( ex op)7ad.n.y yv,8a2a fgcea

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.c(w7ljs6) trfqsp7aicylk0/o02l n 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?

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 capaci- 7-troj uimf+tor 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 constructed with plate area ontn49 :i,hoyn4nvubn i nzsyas -y5,a-s85z4f

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 connecx h/ kq7, 6 2m,nt6/8hm )kwksv,erw2tpicrdlted 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 is inserted. If the dielectric has a dielectric constant of 5.0, what is the capacitance of the capacitor after the sla t2hwrcd t7is)8nke/hm6 q6k mx,2w, l,v/kprb 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 b 7:9py5h;uixnd ;ribl ecomes fully charged. The battery is removed and;b7iu 5x9yhlir n:p;d 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 capacitor'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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