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.)+ hpm5ol a;vz Which of the following statements could be trh;)+ m zov5lpaue?
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 at5l ok5*xwey zk0x *ilqdbw;kfwm)89 0 rest. Which of the folloi yfk5qbxx9w*l*5)0wkl8k od wem;0zwing 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 remains at rest when plarc og 1brmp4zpurn*.9l;4 h,aced on a vertical wall. Which one of the following terms is most closely associated with the electrical phenomenon allowing the balloon to re;n.oc1g rr,z4ru 4 p pbahl9m*main 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 conventionaj(y/ dtq n46k i87eg ij(oky/gl electric current out of the paper as shown in the diagram. What is the direction of the as/gyo4 ykjtiek gd n( j7(/i86qsociated 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 27+x wbnnw/(u f have equal magnitude. The diagram to the right shows the electric field lines surrounding them. Which of the following statenbf+/7uwn xw( ments 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 4k l.qmvvzd gx4r:y* 0 q1 and 0z4r l:gvkdy 4v.x*q m q2 , where 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 charge i3lc4tszn6 *dpl7v v0cs placed at point P in the region near two charges. Whicvl0npd4 ztc*c6s l73vh 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 charged rod is brought near a h3, c*n7dmcb.2qas44 errf dhmetal 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 the electroscope. Which one of thnc27q.a , shde bhf mc434*rrde 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 chargedo4e rr0 2exlh* object is brought near 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 object2eo xre0 l*hr4. 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 givenw saxt48fs-q 3 a positive charge, causing its foil leaves to separate. W-3 sq8fstax4when 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 io5w8ktzpl()6e.ol1, hyzv0d np3zq pnsulated conducting spheres as shown. The spheres have no net charge. Region II has the same polarity as Region wnkz,pt hdl8zpp)zv3 6l o 5e1(o0.yq

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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 h(y su-b-hzu nl6r -u+,fhb7fthrough their hair and the comb becomes negan by-hr lfb6uz-(su, hhu- +7ftively charged. 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 cha69zymvrfg :/fc ipn8n5m i-z 6po/9irrged glass rod is brought near a neutral hollow metal sphere suspended by an insulating striric6imzz pnvpmff/9: 9iyr -n6g/o58ng, 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 metaoq:1 5i2pvuc kl spheres hung on insulating threads attract one another a k1qc p5iv:o2us 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 chargedxw0 p61vcs*/d 1w9hph lst/ tj non-conducting spheres on insulating bases areplaced on an air table. Spherp6htsshpx*0 w 1/ 9 jlctdw/v1e A has a charge +3Q coulombs and 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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