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 second object. Which ov:zvuv sf,+8q f the followin:vsf vv z8q,u+g statements could 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 rest. *oz-mmeey :7r y0 x2mnWhich of the foy:x yo z70m-eme2rm n*llowing statements is 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 balloon remains at rest when vm- eme5 kji1397owfcplaced on a vertical wall. Which one of the following terms is most closely associated with the electrical phenomenon allowing the balloon to remain on the wj vk1wfm5m 3eo9e-i7call?

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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 4k)a;r1 d qnjvb1cc/qlicw,(carries a conventional electric current out of the paper as shown in the diagram. What is the direction of the associated electric field at,nq wqccarkd)/4;1(iljc 1v b 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 magni7g rk:+gy* sg vu+*vpktude. The diagram to the right shows the electric field lines surrounding them. Which of the following statements is tr g pk*ug+*+:sv7k yrvgue?

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 below, what ij1.pah:wmhkrh ha)-xu h82x8 s the ratio of the charges q1 and q2 , where the diagram shown has a82jm)8 ha-xhhhha:1k.wru x p representation of the field lines in the space near the charges.

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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 positive test chau v i*:0*gr k;s.vj2+s km,bl airu:rrrge is placed at point P in the region near two charges. Which of the follrsig *akusm+vj r;ik:2r 0.l: b,*vru owing arrows indicates the direction of the force on 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 awjl*l8x+ ci-i9i m n1c metal electroscope that is initially uncharged. As shown in the figure, the rod *wilm j+lci 9i-8n 1cxdoes 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 object is brought near but not in contact wi 9f2y1p1 zzc4pg0w9we 4kivhj th the top of an uncharged gold leaf electroscope. The experimenter then brieflyzpk941 2cw19j hew4yz 0igpv f 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 contact 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 9oom4 rf9gu3 rv4 *nvjcharge, causing its foil leaves to separate. When an object is brought near the top plate of the electroscope, the foils separate even further. We c o j4v9rr9umo f3*vgn4ould 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 between two insulated conducting sp7b- bc.c zchy)emof0 1ki ci:3khi;k:heres as shown. The spheres have no net charge. Region II has khih-:co) b .icy;f3k 1k ie0cbc7:zmthe 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 a neutral comb d5 kd 0r5hhk3wthrough their hair and the comb becomes negatively charged. h3r5k h0k5d wdWhich of the following is the 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 knngwt2 v2qd6 )e,:lc b sos)/rod is brought near a neutral hollow metal sphere suspended by an insulating string, the sphere will bes c2 v)t nq6blsk2,w)eod/n:g 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 metal spheres hung on insu-godr 4au4xfkn ( y;8xlating threads attract one another as shown. It is known that a positively chanay;x(fd8ug o-4k x4rrged rod will attract ball A.
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 insulit54gm; oqe(i ul lg vtx:k2--ating bases areplaced on an air table. Sphere A has a charge +3Q coulombs a e-o4t t g(kgl2luix:v iq-m;5nd sphere B has a charge +Q 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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