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 attract-md flcr b,.i3s a second object. Which of the followi.dcb-mfi lr, 3ng statements 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 held at rest. Which of th /s0l*e60fkeftrx3 ,nro+ bvde following statemenfr*k3 f,ee/tb r 06ol+ ndvx0sts 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 atzi3)ofl( yk .y rest when placed on a vertical wall. Which one of the following terms is most closely associated with the electrical phenomenon allowing ti.(yl3zf) yo khe 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 conv(uxg7e jr*w*a entional electric current out of the paper as shown in the diagram. What eax*ju *(grw7is 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 equal magnitude. The diagr4l4zod 0svlv 9plhg e t;65mq,am to the right shows the electric field lines surrounding them. W5o vz4t6lgq;e9d , 4lms p0hvlhich 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 chaz,/ 6(1r/o nu bgzanclm00lzg rges q1 and q2 , where the diagram shown has a representation of tcgz(ml,rn0 60 ol/1/guznbz ahe 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 charge is placed at(ehh/ekv)juj.3 b,0*ftzo yo point P in the region near two charges.,yeokej* 0jv(hf3 z b/) ou.ht Which of the following 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 ch5 haf*--rq kwkme8j:4 j yq)kfarged rod is brought 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 move apart from each other when the rod is brought near the top of th - fwkj8k)hey qrk:fqmaj45-*e 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 with th77.fij j :zkfhe 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 k7j:z h7.iffjelectroscope 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 cb 4ro7 oj7qmi*harge, causing its foil leaves to separate. When an object is brought near the top plate of the electroscopi7orb4 m7qo*je, 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 qt y*u qdzm7sk54/ioio35b :d two insulated conducting spheres as shown. The spheres have no net charge. Regi*4 oo3 zys7kdqu 5qim5/tidb:on 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 throughheqcnb a*dl 3id4*l5:4pig h. their hair and the comb becomes negatively charged. Which of the following isddhbpal4hcqel4g**.:i in5 3 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 electricaldlmtk 6h/4+5n zj-dxob 01kngly charged glass rod is brought near a neutral hollow metal sphere suspended by an insulating string, the sphere will be attracted /b-ddnxt nkm 45hzg+6l01ok jto 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 insulating threads attract uoo;9nkj8ux g ux -p 618yafp:one anotherkun;yf xo8upog1 98-jux pa: 6 as shown. It is 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-conductinrmerf+-vmn b9)7- pmxv qr3t(g spheres on insulating bases areplaced on an air table. Sphere A has a charge +3Q coulombs and sphere B has a charge +Q cou rber mtvq-7m3(r+x)9f vm n-plombs. 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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