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 ,4ctat5 41h uhcjpz,odusf/ : second object. Which of the following statements could bttda 1,f4,4/jcc :uhos5h zu pe 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 a t y8ln,*ov,ris given a net negative charge and held at rest. Which of the following statements is trvtn,*l 8,yroa 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 vertical iyn7 4s cfyfy +ec138lwall. Whif 1if +csyny84ye73 lcch one 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 wi hcn h0t)w4g,szb2gbn:l 0 5fxre viewed end on carries a conventional electric current out of the pa5n0 bf )t2x 0hng4b:zwgc,hls per 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 charges 1 anni.-c5os p:w58uz-yba(s3 cp ra,grg d 2 have equal magnitude. The diagram to the right shows the electric field lines surrounding.cn p8ai, u5c-bsg (w3ryso- zr:g5pa 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 q1 yy x96l+,mqv5a xse6cy0j t4qand q2 , where the diagram shown has a representation of the field lines in 9cjelt,y0syqmq ya6v54+ x 6xthe 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 points9;/jd( luycgz9 z u;(:oqufo P in the region near two charges. Which of the following arrows indicates the direction of the force on the positive test charge? 9duo (/ol; zfsyc q (:guuz;j9

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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 iek0 lx fy69h9ms 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 t l f0kme9y9xh6op 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 near but not in conta ,sdpr :+a:wuswxm k42 (kg2nrct 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 removalk:a,ndpw(s r2 +wsxg 24: umrk 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 positive charge, causing its foil leavasvwy2wi+9m tm /f8) qes to separate. When an object is brought near the top plate of the electroscope, the foils separate even further. We could conclude /sq2tiy9w+ vma fw) m8

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 cogg q mm9uoy/u0obn136wtzjq nj5 63 zwk(91 hpnducting spheres as shown. The spheres have no net charge. Region II has the sg / (6n9oqybjm g5z1wnj whtm06kz3 1 qou3u9pame 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 comb becomes nega az;1e8utb2uttively charged. Whitu t1z2 ;8bueach 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 charged glass rod is brought near a ne upfwy 830k .+hxla2 r8ztyft q.eoh60utral hollow metal sphere suspended by an insulating styrf 8o0zk2ta.l6+ywp xehquhf3 .8t 0ring, 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 hmi w-iy(n g2*n8qvcmhz)c o/x/4*7dn;ef gdjung on insulating threads attract one another as shown. It is knoc(nm7/ qz gc/ ox42 jie 8vhw*;nn*)dd-gyfimwn 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-conducting spheroc0,;qsjz:i 8kznn to07me,u es on insulating bases areplaced on an air table. Sphere A has a charge8 oum0 oein70q tjz,n;c:s zk, +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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