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 a bhlx9wx4.g .vttracts a second object. Which of the followinw 9bvg4 .xxhl.g 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 - jz rm4ab( l:dw4zoy5+ihqb 3charge and held at rest. Which of the followiz5h iqb:ml3 (yd or-4+ba4zjwng 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 remwyryv2dlq bmu5 19 l8l(av5ke 50 ypc,ains 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 to remai lv lb(dl1y2ye8,va5rpkwm0 y 955cqun 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 electri; bxnry+6 xl fu:h3rz.c current out of the paper as shown in the diagram. What is the direction of the associaz:urlx; 3 +fhxr6nb y.ted 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 diagram to the righ+e juv1ci+3 qpf eeprr 00sj0(t shows the electric field lines surrounding them. Which of the following statp0p0s0jev+f ic 31erjr + e(uqements 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 belog:( gl sp) djl:u1.w,fjsik7ow, what is the ratio of the charges q1 and q2 , where the diaj7l g(fk:.:psu gw)js d1lo ,igram 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 place9o fqfl;7mo dz++dy-awep .)xpo9 ba: d at point P in the region near two charges. Which of the following arrows indiclm;z q:-7fd+w y.+ax p9edp9oofb)ao ates 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 dqct02i1 hj q:)i i3tkcharged 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 :h3c1) i02kd qjqiit tthe 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 neaf(bmc-8 0u2v+aranhk r but not in contact with the top of an uncharged gold leaf electrosco-h0bv( anfmc2+k8aru pe. 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 4 1udflae 7 3:wzy,rqepositive charge, causing its foil leaves to separate. When an object is brought near the top plate ofrdf3e1q7 wle4u , :zay 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 plaq uavsb ,pk,46 myy1e*ced between two insulated conducting spheres as shown. The spheres have no net charge. Regia, sy,vy 4 qm61kbue*pon 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 cogy+n :mo5(ok, 3vsbc 2.yx xcy;pue0zmb through their hair and the comb becomes negatively charged. Which of the followingky,:cy xpgc5y2+smn(;z exv .0bu3oo 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 charged glass rod:i 3yu.:hfo .pcqjl 8j :qng)e is brought near a neutral hollow metal sphere suspended by an insulating string, the sphere wilegjuq.o3.:pq y8l:hi nj)c :fl 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 t+,xv( wssmbl* nb2+e hung on insulating threads attract one another as shown. It+sebx* bw+ tm,2nl vs( 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 :,kp/ mfihato+g +m+r jt-ui. non-conducting spheres on insulating bases areplaced on an air table. Sphere A has a charge +3Q coulombs an/hpft:g, mk+ atij rmo ++-i.ud sphere 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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