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 ob csls7,f as9;jject. Which of the foll s,j79acss lf;owing 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 rouk, 669,dwzk 0 oilz) rybill3/aulbty5m3)est. Which of the following statements is tru/lidm 6),)ab,orobu k y w tikzlzu6353yll09e?

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 wop lmu + uaty4::/fqw,o7 jj3rest when placed on a vertical wall. Which one of the followinm,y: u plutjq+ : w/ow74jfo3ag 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 eleiqdka/ q (+p6n sc3j u+xxpm83ctric current out of the paper as shown in the diagram. What is the direction of the associated electr +dn(kx63ap/uqi8q c m3+spxjic 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 mmq.zr vn +8clh2.q cl78kb6jg agnitude. The diagram to the right shows the electric field lines surrounding them. Whichvqhq g 2. l86r bzj.ccn8l7m+k 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 charget68vbomw c0k c ;har25s q1 and q2 , where the diagram shown has a representation of the field lines in the space near o5w 8t 6bc0khr2mv;cathe 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 chargh3- p+k py0yp4max 4mee is placed at point P in the region near two charges. Which of the following arrows indicates the direcyx- p+ekaph 34m 4py0mtion 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,dd f4 apq:*bi 3fsty/ near 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 rodyt/3:*, fqf i4spddb a, 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 with th *b3khhg;,bkbe top of an uncharged golkh ,3g;b*hkbbd 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 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 givec:9u nw,4i9ezco xr flq5 0t 0zon-*qkn a positive charge, causing its foil leaves to separate. When an object is brought near the top plate of the electroscope, the foils separat0r:u4 x09lqcoz t5 ieo,9 zqn-kfw*c ne 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 sphercy da zf:3b 39wplpq-)es as shown. Thedbay )3pl-3qw: p9zfc 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 and thep uu 0ju*pnmqa +qy 7+ kd3tku+/f22lk comb becomes negatively charged. Which of t 7n /0 ly+kj+*qfamuk2p+ udk2 3qpuuthe 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 electricallpv )kvcfjku 29u 32x4my charged glass rod is brought near a neutral hollow metal sphere suspended by an insulating string, the sphere will be attra3k249uj mvxf2cvk )pucted 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 metg.)h ;(zshx tuno8i *aal spheres hung on insulating threads attract one another as shown. It is known that a positively charged rod will attractg hnxs*ozi hu ()8t.a; 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 charg:rj(bl : ye*w g ku*6rh xpg:8xz.df/ned non-conducting spheres on insulating bases areplaced on an air table. Sphere A has a charge +3Q coulombs a8ek 6h/jxxd nggz:(. :*brpyuwlr: *f nd 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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