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 objelxk/g1uwy/,r jr q w14ct. Which of the following statements could bexwy q1,/w jkrg/ 1l4ur 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 negvarq(wg *k d,; ue5gj9ative charge and held at rest. Which of the following statemeje ;(gw q gvrd5*,uk9ants 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 ba/m9e zlfrr6v / y)phk5lloon 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 kp65 /yz)le/9mfhrvr 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 electyjpmfb wgpw ;0s6vbe7:)b2e5*z bt6 hric current out of the paper as shown in the diagram. What is the direction of the associated electric fiel p66j;bw0 :ybz b hs) e5vf*mg2bw7eptd 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 rg luy)hce +3d.63ovs magnitude. The diagram to the right shows the electric field lines surroundin vs.e curod 36y+l)h3gg 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 sh j3g5wrxqp i+ d3(zv;wown below, what is the ratio of the charges q1 and q2 , whw j3givqrwd z5p;+x3(ere the diagram shown has a representation of the field 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 charb yfw9hhu:2a-co c5l9ge is placed at point P in the region near two charges. Which of the following arrows indicatel5uf 2c a9h bwc9-:yhos 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 k 4d6wqcami/yin:z 9 9charged rod is brought near a metal electroscope that is initially uncharged. As shown in the figure, the rod d nak 9:mcd96wz 4iiy/qoes 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 object is brought nea8 rx,urxm4o+ ok 8kkw7r 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 t8xxu+,ro8 k4mk7 w rokhe 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 electrosco:nif0id5efl1 st 9d c9pe is given a positive charge, causing its foil leaves to separate. When an et0:9d5l1nf dsf iic9 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 p9)e7jo yv,q jclaced between two insulated conducting spheres as shown. The sphecjjo )7qey 9,vres 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 througp 6jq73gyrq ,suzxvv,o)v;d9h their hair and the comb becomes negatively chargqpvr) ,7ugv9osxzjvq;3, y d6ed. Which of the 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 electrically ch. q; i1ohny)w j/wy2fearged glass rod is brought near a neutral hollow metal sphere suspended by an insulating string, the sphere will jn )ow/qw .1h ef;yyi2be 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 my 6(22qc b0udqs 3gcdxetal spheres hung on insulating threads attract one another as shown. It is known that a positively charged rod wdx q2y0(gcc3 dsq u26bill 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 base0q)w4 vgfzlexiwi 47vic -1 z:s areplaced on an air table. Sphere A has a charge +3Q coulombs and sphere B has a charge +Q coulombs. Which of the fov ziig4w c:i7l14v -x)w0zfqellowing correctly illustrates the magnitude and direction of the electrostatic force between the spheres when they are released?

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