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 conductp 5(+kdd x9ojtz:j)udcp pis w1jq-+/or attracts a second object. Which of the following state)-d jp i(t++qskzj9 xj:1p5dupwc/doments 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 g5b-*(yufx: dilb(s bozb5 zv0 iven a net negative charge and held at rest. Which of the following stavb5 y- bfzs :i5ob 0z*lbu(d(xtements 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 e-, yor :r+lndballoon remains at rest when placed on a vertical wall. Which one of the following terms il-d: yner,+r os 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 eleckfgnu 5h;s1bq*8q xb2 tric current out of the paper asgx*85 kqfbub q21hn;s shown in the diagram. What is the direction 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 equapoiq04 k p8o*nl magnitude. The diagram to the right shows the electric 0p4*onqik p8ofield 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 b31 rsn9t9qy*1qy )fbtstti b9scha16elow, what is the ratio of the charges q1 and q2 , where the diagram shown has a representation of the f y1 * fsa)hbqyt3tsstc 9b16i9r tq19nield 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 region neawe nvl m47zx4i42 ;3vdto o(dor two charges. Which of the ftd mw; ox73oz leiv4d42 vno4(ollowing 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 a metal electroscope th oibsxi 3wzrd/u .(0ph46f: xwat 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, dw(uzh/0:6 ris.xfi bp4o3 xwbut 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 objc ast+++cru5 hect is brought 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 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 + 5rcs ta+huc+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 grfalw4 ;8abd -iven a positive charge, causing its foil leaves to separate. When an object is brought near the top plate of the electroscope, the foils separate e baw4dlr8f; -aven 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 be0q6 blejnl3 9bmh zzjf 7u,u-8tween two insulated conducting spheres as shown. The spheres have no net charge. Region II has the -b7 hbne3zl ,8ljf 0m zq96ujusame 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 thef,c lkdbj)4-d w(3f jeir hair and the comb becomes negatively charged. Which of the following is the besdj)d3k w, jl4-c fe(bft 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 electricalllvs l riv84qgstbr4 v t-0k h1u7ot(0*y charged glass rod is brought near a neutral hollow metal sphere suspended by an insulating string, the sphere will be attril-0 84t vhvr7 1vsuk04tgqlrb sto*( acted 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 sphe4bms l*x092 tf8wrdx .s y7uqwres hung on insulating threads attract one another as shown. It is known that a positively charged rodbf 0tm7 qd.489wxluxwrs*2sy 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-cond- *yqm- htwb-;anq k wo;lm3/tucting spheres on insulating bases areplaced 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 forcnlq3;bh mmqw a;-/ -o*t-wtkye between the spheres when they are released?

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