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. Wh :hxi2 1 pgapy:4cf1qoich of the following statementh1 xp1gfcyo42 pa i:q:s 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 negativedhqe ,nc:h3j 75 pq/ue charge and held at rest. Which of the following statements is tre7/uh jqd5,h eqp nc3:ue?

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 verticaup- n)oa wp1-cyght)k. z+cp3l wall. Which opcgoca pph n )-y.-k+13u)zwtne of 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 v kcd1 - hw:0ez9wyhx9miewed end on carries a conventional electric current out ow91 kc9dzm y: -0whxhef the paper as shown in the diagram. What is 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 chargesiytt5k:lz3.)i lq1ar 1 and 2 have equal magnitude. The diagram to the right shows the electric field lines surrounding them. Which of the following statements rky zq31 5attli.:)ilis 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 diagramdv(95st,ljz d1 oyxu 6 shown below, what is the ratio of the charges q1 and q2 , where the diagram shown has a representati, td6o z1ydujx(95v lson 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 charge is placedctu yoby-9 )9m8 kbh9p at point P in the region near two charges. Which of the following arrows indicates the direction of the force on thm-htob9 98pc yu9kyb)e 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 electro4tl0bw*mgs- nscope 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 the elw-lmg*t s 4b0nectroscope. 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 fvow 0u;y7g g*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, folf*v ;goguy0w7lowed 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 p rz2*;chil yu*(le*i hffz8 3is given a positive charge, causing its foil leaves to sepa*zf8 * 3h*yp ;ui ziel2hfl(rcrate. 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 placed between two insulated conducting spheres as so, x8zr8r*2yt p-,cffnjh; o ahown. The spheres have no f,noj xtrfr 28cpz,-h8;o* ay 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 through their hair and .ismy,/gup *2uva l-rthe comb becomes negatively charged. Which of the followi-r,*svmiup2l .ug ay /ng 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 positivezau 2/p,gm-kxm4 he8 y electrically charged glass rod is brought near a neutral hollow metal sphere suspended by an ine- z2 gxu4myh8k/m,apsulating 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 spheres hung on inv)-ltu 7l6n alqhb z +u-6dvqx,t n4h.sulating threads attract one another as shown. It is known that a positively charged rod will attract ballul,q-dqz) h 7nba6 nvh tll.6x- t+4vu 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 sphfjarj5k :0 aa0mec+tnx1 i5bcg40 id9eres on insulating bases areplaced on an air table. Sphere A has a charge +3Q coulombs and sphere B x 0 andb5a5 0:f0m94j rjg1+tciieka chas 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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