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 c+ l+m3/emxhmv harged conductor attracts a second object. Which of the following sta+ 3hmxvl+ mme/tements 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 helftvv68 ra ,o;td at rest. Which of the following statements f;tvt6a8o,rv 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 ncqo4,w w sx,-charged balloon remains at rest when placed on a vertical wall. Which one of the following terms is most closely associated with the electrical phenomenon allowing the balloon tcn wox4-s ,w,qo 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 vieaa0t+mujtu*. 28g w(ius .:gjn3fa zswed end on carries a conventional electric current out of the paper as shown in the diagram. What is the di8 .*fwt+jgunatu: ija2u (g.ssz 03marection 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. The diagl* btcxq9oc(m *ji3 tbt;1qw7 ram to the right shows the eleb * cwi1*;9q(t 7cbqojlt 3xtmctric field 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 below, what is6o8vxm-xlg7 ionmt800/qh;vv * dk ik the ratio of the charges q1 and q2 , where the diagram shown has a representation of the field li7 k nml/dxvto ihq8*iv0x-8go m;60kvnes 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 c/4 fq( 3djaiw 1j miy:ye(ubpix*0dt8:xm6 fis placed at point P in the region near two charges. Which of the following arrows indicates the direction of the fix 3ae4xj(mip uwdb( fm i0cjf qyt/:*8: 61dyorce 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 that is in 96vwan /p)c7u/nqthgitially uncharged. As shown in the figure, the r9hn g7t) v/cn6awq/puod 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 obt8 u9 x 9 momkszvz4a.0ox;0pqject 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 electu9xxsm ;.p0 m9 0z4v azq8okotroscope 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 foi ll1p3e87l yfzyc(o/q l leaves to separ 7f y/e1zl(38lyp qoclate. When an object is brought near the 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 ;sc*ztn 8kg ,uj;) wyaplaced between two insulated conducting spheres as shown. The spheres have no ne8usz)* ;gt,cj awkn ;yt 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 cqgywyh0j:x30wd7 yh6 gz7 a 9neutral comb through their hair and the comb becomes negatively charged. Which of the following is the best explanation for7yc w:hqwjh6ad0 gzg07y9y 3x 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 positiv5 (of7xlfzc1v e electrically charged glass rod is brought near a neutral hollow metal s5vf(1o 7fcl zxphere 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 zn 3vp s+ sr-h,-.jjbv.o 6jjjmetal spheres hung on insulating threads attract one another as shown. It is known that a positively6 vsjpj +hjr-jjzv-3,n .bs.o 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 on insulating baseppcl; xu e1)wo fkv kvol.85-ra;t*+is areplaced on an air table. Sphere A has a charge +3Q coulombs and sphere B has a charge +Q cotf k )p*o.;vxl1;a upw 8i5o kvrcl-+eulombs. 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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