Electric Field and Electric Induction - 题库网 (tiku.one)

?作业考试练习?美国物理杯赛(Physics Bowl)?Electric Field and Electric Induction

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习题练习：Electric Field and Electric Induction

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答题人: 匿名未登录开始时间: 24年08月22日 10:29 切换到: 整卷模式

1#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

94.07: A positively charged conductor attracts a sojspp/q dr00y3zf:48 br gj.o econd object. Which of the following statements copgzr.jdo8bj:034fq /sy op0 r uld be true?
I. The second object is a conductor with negative net charge.
II. The second object is a conductor with zero net charge.
III. The second object is an insulator with zero net charge.

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2#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

96.07: An amber rod is given a net negative charge and held at rcoue1 /l6-tl:gua n4dest. Which of the following statements isdg4:ol-utc6a n/ule 1 true?

A. The amber rod is surrounded only by a magnetic field that circles the rod.

B. The amber rod is surrounded only by an electric field that is directed out from the rod.

C. The amber rod is surrounded only by an electric field that is directed into the rod.

D. The amber rod is surrounded by both a magnetic field that circles the rod and an electric field that is directed out from the rod.

E. The amber rod is surrounded by both a magnetic field that circles the rod and an electric field that is directed into the rod.

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3#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

15.08: A negatively charged ballod1bt .re,z wa xeb/t7(on remains at rest when placed on a vertical wall. Which one of the following terms is most closely associated with the electrical phenomenon allowing the balloon to remain on thbez (tb wdx/ 71e,art.e wall?

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4#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

01.37: A long straight wire viewed end on carries a +j(vld ku9zjc swog5ps;ysh6; (g )i(conventional electric current out of the paper s6ozp9 ;wgjc vyjdiu(sg(5;s (lh +)kas shown in the diagram. What is the direction of the associated electric field at point P?

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5#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

97.05: Point charges 1 and 2 have equal magnitude. The diagr() iew s)kgrxie*zr bu/;) b-fam to the right shows the electric field lines surrounding them. Which of the se( kr/bebz*u;xw) )i)ir-fgfollowing statements is true?

A. Charge 1 is positive, charge 2 is negative.

B. Charge 1 is negative, charge 2 is positive.

C. Both charges 1 and 2 are positive.

D. Both charges 1 and 2 are negative.

E. Both charges 1 and 2 have the same sign, but it is impossible to tell which.

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6#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

07.26: For the diagram shown qe.g0w 9bgmtb .u+a7vbelow, what is the ratio of the charges q1 and q2 , where the diagram shown has a representation of the field lines in the space near the charges.t gbu mebv9w7g0+q a..

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7#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

05.17: A small positivb,s p y.f4ycha( :az0ae test charge is placed at point P in the region near two charges. Which of the following arrows indicates the direction of the force oc,asf4 bpa zhyy(0a.: n the positive test charge?

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8#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

11.05: A positively charged rod is brought near a metal electrosc1v ezosnuc.i5e -4xu/ope that is initially uncharged. As shown in the figure, the41o-u ue 5/nxei z.scv rod does not touch the electroscope. There is no charge transfer between the electroscope and rod, but the leaves of the electroscope move apart from each other when the rod is brought near the top of the electroscope. Which one of the following choices is the best explanation for this phenomenon?

A. Protons are repelled by the rod into the leaves of the electroscope.

B. Electrons are attracted out of the leaves of the electroscope toward the rod.

C. Protons are repelled into the leaves of the electroscope and electrons are attracted out of the leaves of the electroscope.

D. Positively charged electrons are repelled by the rod into the leaves of the electroscope.

E. Positively charged electrons are repelled into the leaves of the electroscope and regular electrons are attracted out of the leaves of the electroscope.

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9#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

04.15: A positively charged oberzf rd:i, u uaca, 2;p1/hq,zject is brought near but not in contact with the top of an uncharged gold leaf electroscope. The experimenter then briefly touches the electroscope with a finger. The finger is removed, followed by the removal of the positively charged object. What happens to the leaves of the electroscope when a negative charge is now brought near but not in contai/, ;h u:azpe ar,,q 1cfzrud2ct with the top of the electroscope?

A. they remain uncharged

B. they move farther apart

C. they move closer together

D. they remain positively charged but unmoved

E. they remain negatively charged but unmoved

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10#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

98.09: An electroscope is given a positive charowb2gte .1y 5y0/le( q v4vqvgge, causing its foil leaves to separate. Whe4 /g v qoyvbwl5g.ev 0(ye1qt2n an object is brought near the top plate of the electroscope, the foils separate even further. We could conclude

A. that the object is positively charged.

B. that the object is electrically neutral.

C. that the object is negatively charged.

D. only that the object is charged.

E. only that the object is uncharged.

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11#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

97.06: A charged rod is placed betweed +t p 5pqm*qz),vvkh+n two insulated conducting spheres as shown. The spherehv k*zq,+ptmp q)v5 d+s have no net charge. Region II has the same polarity as Region

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12#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

09.23: A person rubs up. hls;f,h:ta neutral comb through their hair and the comb becomes negatively charged. Which of the following is t:,f slp;u.t hhhe best explanation for this phenomenon?

A. The hair gains protons from the comb.

B. The hair gains protons from the comb while giving electrons to the comb.

C. The hair loses electrons to the comb.

D. The comb loses protons to the person’shand holding the comb.

E. The comb loses protons to the person’shand while also gaining electrons from the hair.

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13#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

02.09: When a positive electrically charged glass rod is brought: p2hmk f+41doz hjs*2mq fh)e near a neutral hollow metal sphere suspended2 ):szqk me 1po*dhf+2f4jh mh by an insulating string, the sphere will be attracted to the rod because:

A. the rod is much larger than the sphere

B. the rod removes electron from the sphere

C. the electric charge produces a magnetic field to attract the sphere

D. the charge on the rod causes a separation of charge in the sphere

E. some of the protons from the rod have been given to the sphere

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14#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

02.24: Two small hollow nxo)g,busbx ):+ z5r.lb +ioqmetal spheres hung on insulating threads attract one another as shown. It is known that a positively charged rod will attract ball Aq i+b,obrbxo) g)5nul.+s x :z.
I. Ball A has a positive charge
II. Ball B has a negative charge
III. Ball A and Ball B have opposite charges
Which of the above can be correctly concluded about the charge on the balls?

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15#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

06.36: Two uniformly charged non-conducting spheres on insulating bases are+uid )zc i*:h7jgx. ldplaced on an air table. Sphere A has a charge +3Q coulombs and sphere B has a charge +Qx )+7:uh jdi d*l.czig coulombs. Which of the following correctly illustrates the magnitude and direction of the electrostatic force between the spheres when they are released?

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