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 attra79n7h;osf8(n+zf. zv q vzbi y,uxic7m .+w xacts a second object. Which of the following state+xm+.;(fw7zi.n9c a, q bn7zh8v 7i fzsovyxuments 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 negqnx vy6yex/sj+12v mk*)hmnx* 3rq:hative charge and held at rest. Which of the following stateme*yh*ekxx:x6+ rysqqm nj1)h n3mvv /2nts 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 v+r1.m6kb sv afhj8q- a3unk 9on a vertical wall. Which one of the following terms is most closely associatv unkm3v6q ab-f8h. raj19+sked 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 viewed end on carries a conventional electric currfk 1yn y,c.r3bent out of the paper as shown in the diagram. What is the dire13cnyy. f, bkrction 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 magnituyv*1pbe5u6s92 zi- k7ck+ lzckjmxk: de. The diagram to the right shows the electric field : lv96bz e*x1-c5mikkkcz+jsp k y27 ulines 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 is the ratio of the charges 82, fltv4uyk84ztk: ipjgib 3 q1 and q2 , where the diagram 4gbtkzv,i34p8yi8t kj l:u 2f 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 charge is placed at point P in ,ro1th c32uwg(hxxou .b m i-1the region near two charges. Which of the following arrows indicates the dixm. rh 3gh1ot(1 uc2wo,uxb-irection 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 chw6j3 apo ; f/ncb)y+hlarged rod is brought near a metal electroscope that is initially u3 py; ao+6/w)fjnhlbc ncharged. 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 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 ne/r0tf82dfhot0 8qkif ga-d f *ar 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 electroscope when a negative charge is now brought near but not in contact with the top of the electroscopddgtt* 8 afff8foqk0-2/ ih0re?

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 posit 59u*3)qtcbons jp+(k k1pi sjive charge, causing its foil leaves to separate. When an oboikb 1s +3cp5) qts*j9knu( jpject 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 s:mlt v k)x.n,cx tlw54z7,rt dpheres as shown. The spheres have no net charge. Regiondlxm,v )4 k l.,c:r7ttztnwx 5 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 the c,c16:1j tp.z,vu6rkzh s lxsp omb becomes negatively charged. Which of the following is the best e:1.6zt6 pus vckrp jl ,sz1,hxxplanation 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 charged glass rod is broug bxup8nem1n0 -ht near a neutral hollow metal sphere suspended by an insulating string, the sphere will be attracted to the rod beeu-8bnpmn0 x 1cause:

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 holloi7b2ov2 zux vg y;kwth (;v13aw metal spheres hung on insulating threads attract one another as shown. It is known that a positively charged rod will attract b;g xvztwiy(a71buvv22k3 h o;all 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 insulaz+zecl- ecb05i 72mdzting bases areplaced on an air table. Sphere A has a charge +3Q coulombs and sphere B has a charge +Q coulombs. Which of the following correctly illustrates the magnid2le0zimb +z5z7cce - tude and direction of the electrostatic force between the spheres when they are released?

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