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. ,0oalo0xy s xx5wdhhd4pb;bt52c ,ox 6i8h6 gWhich of the following statements could6xy5o iohb;s dh0pt 2aw80x , xc, hd4x6g5blo 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 rek pd6qf50(pq5bc nlr s6i*n/z st. Which of the follopkz0sqrp 6db q *n(6i5 /5fclnwing 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 charged balloon remains at reolu - yw onrx/-s1:f;ah,tz8est when placed on a vertical wall. Which one r:s;t of1xuze/- al on, 8hw-yof the following 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 curi g5;ge wvnnl9 -:o z08yex95vqcs7 qcrent out of the paper as shown in the diagram. What is the dire 5o8;g-y9 g79q0q e nlc5iez:ncxwvs vction 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 mw(51gj/yfzs6 2 a i,vx *k(/abf zumjkagnitude. The diagram to the right shows the electric field lines surrounding tk2ja/yb(vfaf5xu 1*ig/mzwz s, 6( kjhem. 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 q1 andmmxscv : tv39+ q2 , where the diagram shown has a representation of the field livtc 93mmxv+:s nes 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 positiv0tgnn5 z d7w ab2 gfc2cjb*8m/e test 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 pos ggw8c7j cbbfzd 52n2n*tm0/ aitive 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 bv 882s) 7w drbxi,itjlrought 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 rod, but the leaves of the electroscope, w7ixr)s8btj82 id vl 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 near2/goxs.lc ov;hh8 j ,o but not in contact with the top of an uncharged gold leaf electroscope. The experimenter then briefly touches the electroscope witvsolj8h ,ocg/2o;xh . h 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 its foil lezajpbu/k60g; p,s:pz aves to separate. When an object is brought near upa,0 ;zk:zpbpgs 6/jthe 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 sphg+se8jncv5 )nuy;hf 8eres as shown. The spheres have no net charge. Region8cs; 5h8nnve fy)u+jg 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 x5 v5 vn eta0silir-)4g t)4v/jctw)h hair and the comb becomes negatively charged. Which of the following is the best explanatio)r4w ji hgtixvn) ev5v40)s tlcta -/5n 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 positirc/cu.l nx-,so /)5yvm:aw ixve electrically charged glass rod is brought near a neutral hollow metau :/.a/c5mc-snl, y xoirvxw )l sphere suspended by an insulating string, the sphere 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 s5ywlre. fof )22tl9m ft,s *x5q6zjtk pheres hung on insulating threads attract one another as shown. It is kn o lwtk jl*mxs,r5q 6f2f.)te5 tz2y9fown 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-conducting spheres onwk7ap*q2fuqv;e49n: , o aneeg +oia( insulating bases areplaced on an air table. Sphere ooef w7e:aqk v,2(* pnq ;iu4an9+geaA 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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