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 ndvi+wu 0/xr 5conductor attracts a second object. Which of the following statements could be true? idr 5 v+nu/0xw
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 , ya xej-sa+l2given a net negative charge and held at rest. Which of the 2e+ -y,lasxajfollowing 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 but4e gah5*a1charged balloon remains at rest when placed on a vertical wall. Which one of the fola*ua14b5theg lowing terms is most closely associated with 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 wire viewed end on carries a conventional electric curren;c t*siq-v0qo) d.mpk t out of the paper as shown in the diagram. What is the direction i*v;mq) sot.-d pk0cq 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. Th;(+n9dk.+vjgy6t rl h fmb. qne diagram to the right shows the electric field lines surrounding thed 6n gkyh 9. .q(trbl+fn+jm;vm. 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*ysa onhl 2w fht3f:9;ngn7/fq ;bp3 w ratio of the charges q1 and q2 , where the diagram shown has a representation of the field lines in thon /b9*w3 an:hfhy; q73wfgl; 2 tpfsne 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 i9ucvfb g4 2z8us9 zai,s placed at point P in the region near two charges. Which of the following arrows indicates the direction of the force on the positive tev,299zsb 4uu z8icf gast 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 m2ph6ge1h9ga0fa cz jxmaa316etal electroscope that is initially uncharged. As s12p3e6 jg1agzafhxm h6ac 9a0hown in the figure, the 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 object is brought near but not fov2d0u v6 y (5ye1vqiin contact with the top of an uncharged gold lyy fq65 0uvv(veo 2di1eaf 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 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 b f4yvx7v./vg its foil leaves to separate. When an object is brought near the top plate of the electroscope, the foils separate even further. We could c.7gbfv4/vvy xonclude

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 spheres a v l;o9zvslis- /vqlswz (/5s*s shown. The spheres have no net charge. s 5/sszzq(- l9vv;l wi vlo/s*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 hairnxt7bc pfj 13z70 4yam and the comb becomes negatively charged. Which of the following is the best explanation for this 3c mt f1ayn7j xb0zp74phenomenon?

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 n) ofrss)sx*nse9-t .fear a neutral hollow metal sphere suspended by an insulating string, the spheret s9)s.f*so nfsxr)-e 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 metal spheres hung on insulating threads attrajx +g ev:9z/6k6zlj1 -cgtcbjct one another as shown. Icb e-jcg/zgx+k9t 1:l zvjj66 t is known that 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-conductingff1gswor 8 d,4y;p vr/ spheres on insulating bases areplaced on an air table. Sphere A has a charge +3Q coulombs and sphere B has a chargeg, rv1fows8;/r dp4fy +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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