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 conductor attracts a second object. Which of the fo to2bw:zv ow1zb g;ww(b .sq8+llowing statements coul+o2oww;z.wq(vg w 1bbz tb8s :d 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 resr tp m5s4;mj-it. Which of thesi;-p 54m rtjm following 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 rest when placed on a vertica;gmm hq2u 1)nkl wall. Which one of the following terms is most closely associated with the electrical phenomenon a;n 1mqg2 ku)hmllowing 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 curre-d/c7nu 6josunt out of the paper as shown in the diagram. What is the direction of the associated electric field at pons7duuj6 o-c/ int 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 diagram t l0 (hx3j6b0imovf.fzo the right shows the electric field lines surrounding them. Which of the following statements isj zb( 06x0loff i3.vhm 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 of39cs:i;a b,qi k1mybfhwp,k)8 9fdav .6 rzwc the charges q1 and q2 , where the diagram shown has a representation of the field lin;)wdikb89f m. a w,i9hyrkcapz :f,qb3 cv61ses 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 incr1v3yyg 2e ,t n z8m0 2v/k3ipui8vmq the region near two charges. Which of the following arrows indicates the direction of the force on the positive y r83e iq/31pg,mn280 czykm vuivt2vtest 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 me( 7o 2jpsf6bs) ,1fc t5wycgvxtal electroscope that is initially uncharged. As shown in the figure, the rod does not toucwb5y c j) 1fsvgx7pfs2oct6,(h 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 in contact (1 /yn;p q,w4tkiws da)zbq +twith the top of an uncharged q/wa d;zqp4(+s1ttkbn wyi ,) 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 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 posi6wf,axdut4a6 tive charge, causing its foil leaves to separate. When an object is brought near the t4ux ,6 dawf6taop 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 betweenwd5xe:m:br ms ro2x0o a: u4m( two insulated conducting spheres as shown. The spheres hu wde: xm4xm(ooa:rmsb :250rave 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 com 1lxqwa3dkitwt- 05f1b through their hair and the comb becomes negatively charged. Which of the f-qwk1la0xdti fw315t ollowing 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 positiuy5u zyp7wr7u6/ty qb;f2 s9g dai6o-ve electrically charged glass rod is brought near a neutral hollow metal sphere suspended by an insulating string, the sphere will be attrwpu5if67qb;2a 9uzos6/ - yg y u7rdytacted 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 i( m6wdym szobrdl:kx. 3 ce*mai+ +0m)nsulating threads attract one another as shown. It is6 becw++kyi x :3mdomm0(l*s.) mrazd 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-conducting spheres on insulating/p, : agdgz0u.dsop/b:xmfr-;o 7 xcl bases areplaced on an air table. Sphere A has a charge +3Q coulombs and sphea, gp:/xlrb-.o/7ud0xg mosf pz: ;cdre 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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