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: 游客未登录开始时间: 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 condygmsv,p.-cjk*r v3;d-l yl kv)dl:l 5 uctor attracts a second object. Which of the followinglkg- l*d ;k)vs-3jryp,cv.5llvdy:m 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. Which of ,+2oedzj -jdc nlf 4(qthe following statemen, le2j4jzdd( q -c+fonts 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 ):ggpf 2fmboq*:x*bem9z 1 bjballoon remains at rest when placed on a vertical wall. Which one of the following terms is most closely associated with the electrij:*) fmz2bmq obgp: *xefg 1b9cal 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 wirm;8 8(fra3s,jh eg3 bxehgr0he viewed end on carries a conventional electric current out of the paper as shown in the diagram. What is the direction of the associated electg8; arhb33eg8 e( 0xfmjrsh ,hric 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 an ojqwy0z8b j1tm.mh 0ys1; i gsz9zx/8d 2 have equal magnitude. The diagram to the right shows the electric field lines surrounding them. Which of the following statements;xzmyqb0 0h11gj s yzt/.89zjo8w smi 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 0:)vzg l4 4dxuwrue u.q1 and q2 , where the diagram shown has a representation of the field lines in the spacew:.vrz4 )0x4gulud eu 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 -h0eso)fvwl; charge is placed at point P in the region near two charges. Which of the following arrows indicates the direction of the force on the pose-lvo;f ) w0shitive 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 -a 6cbddim b; nq266 sy;,qeynnear a metal electroscope 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 leaves of theydm bba6 csin,2y6 n6;q ;-dqe 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 ch +0pl bd9c4*by2gc 3p+/xei jtu6aujdarged object is brought near but not in contact with the top of an uncharged gold leaf electroscope. The experimenterp/dxlcb92udpje+ utgb* j 6cy ia403+ 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 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 ui x8euma8nb6 7v 9pd(-c.fqra positive charge, causing its foil leaves to separate. When an object is brought near the top plate of the electroscope, the foils separate even further. We could conclude 9pvu-dxeuicm868r a.bq 7f n(

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 placee- u 3*)x/iebss5kptc d between two insulated conducting spheres as shown. The spheres have no net charge. Region II has the same*t ) 5ie3kc/bsuxp s-e 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 tht:x ctxy66-v.zwb gst5nhl8;9eas r8rough their hair and the comb becomes negatively charged. Which of the fol5 lg6wss z yx-: bh9ttrt.;xc8 8vaen6lowing 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 electf6*bherxd 87t2q7 bo szhi x/-rically charged glass rod is brought near a neutral hollow metal sphere suspended by an insulating string, the sphere will be attracted to the rod becauq7xh-/2t 6dsioeb8b* xh7z rfse:

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 insulating threads attract b*:by gwl 2x6rone another as shown. It is known w:l6*b r gbxy2that a positively charged 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 ,3zzec th4xb4 spheres on insulating bases areplacedxtehb,34zc4 z on an air table. Sphere A has a charge +3Q coulombs and 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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