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 ofpqdtm2x +q* 9u the following stdxpu9q q *2+mtatements 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 mmwv1ufqt (y2.5cbwd )- jcb)net negative charge and held at rest. Which of the following statements is truef 5t cdj-b u vmbqwy.()2)cmw1?

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 rp) eu sfn/6te7emains at rest when placed on a vertical wall. Which one of the following terms is most closely associated witnuse6e )7fpt/ h the electrical phenomenon allowing the balloon to remain on the 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 wir fyovh 6oa.f4(rog a50c) ula:e viewed end on carries a conventional electric current out of the paper as shown in the diagram. What is the direction of the g6) va.oho0rfof4 lu:a( 5cay 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 and9*ow mkbtq2 s0 2 have equal magnitude. The diagram to the right shows the electric fqo9w *2bt0ks mield lines surrounding them. Which of the following 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 below, what is the ratio of the charges ljyb5q8ce- g : q1 and q2 , where the diagram show8q -:bclge5jyn has a 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 charge is placed at point P in the gav36k3 h *oszregion near two charges. Which of the following arrows indicates the direction of the s a3gh* 36vkzoforce 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 a metal elecv hr. trpixl03pmo6 zsk+k.k/96y 5h ytroscope that is initially uncharged. As shown in the figure, the rod does not touch the electroscope. There is no charge transfer between the electroscope and rod, but the leavesr6pkklzv/ 95p yosr .6+tix.0 hykm3h 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 m r +qqn nnq1.fro975abrought 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 oq9n n7r nf.maq+15 qrby 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 charge, causing its foil leaves to z+/ d6iue fsh5hk6qp8 dl9u .yseparate. When an object is l u5i9hh+/pq6e.uzyks 6 d8fdbrought 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 between two insulated conducting spheoa 7jus0 lbyf8 96c, di+)o2tilq4sbo res as shownfj,s89di +l2by4)c iq0o u7t soao6 bl. The spheres 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 a neutral comb through their hair ahd ,opu3 3bnv-nd the comb becomes negatively charged. Which of the following is the best explanation for this p,phn b3-douv3 henomenon?

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 brfan )qqu--( b+u9 ,7fuqpj0ygiv xz c(ought near a neutral hollow metal sphere suspended by an insulating string, the sphere will be attracted to th +,qg zx0 -vfbui9)ycf -uuajq n7((pqe 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 inst(od k0h0 meze:z5wi 6ulating threads attract one another as shown. It is known that a positively charged rod will attract ball Aoi6:t(z00d hwkzeem5 .
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 charge5 +z 8u62yi1pmmnut9,neqze sd non-conducting spheres on insulating bases areplaced on an air table. Sphere A has a charge +3Q coulombs and sp p2un65+ 9,neu8e1mm zistqy zhere 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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