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 attractsu(n/ 4bhd5 w2c sol.i1srzp/l a second object. Which of the following statements could be true?s zb(2cs//ulod p 4.rl5h1wi n
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 at rest. n 6wqp)lrc*cf 9 / xln+7m,iidWhich of the xc) il6qd,r*+nli f7mn9pc /wfollowing 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 placdd:qf ihi2ag 1)*tbia7 23jrqed on a vertical wall. Which one of the following terms is mi2 djgqfiq:)dir* th 321b7aa ost 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 viewed end on carrik r,t h+-/oories a conventional electric current out of oit h/+r-or,kthe 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 charges 1 and 2 have equal magnitude. The diagram to ts3xns w2+e9v ahe right shows the electricvx w2e9 3+nass field lines 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 theoqpyb14 fi2-e1 l h +5(shut/eykw.cx charges q1 and q2 , whelo5 2h e- q+xh14bcup y st(ekfi1.y/wre 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 .t tv)3+nv4ud)g pahtju ;)mgis placed at point P in the region near two charges. Which of the following arrows indicates the direction of the force on the positive test chargeut).aguvht+ g)m j);4dvn3 tp?

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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 nealgz.7p 5rnq1;6jg dn.za l(nkr a metal electroscope that is initially uncharged. As shownn61d .z (pjlnqga.7 gz;n krl5 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 charge m+6bi orpaw+-d object is brought near but not in contact with the top of an uncharged gold leaf electroscope. The experimenter then briefly touches the elect-b6i+wr p+mao roscope 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 positive charge, causing its foil leaveul um8tyr. zmnjpu8 c(+ tey)4w9 p13qs to separate. When an object is brought near the top plate of the electroscop3 y8p.qc(m tjm te )z8l1nw9u ru4uy+pe, 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 conducg+y/ruab0 amx71q b jhp 61k1cting spheres as shown. The spheres have no net charge. Regkq bum1 a +1p0bxycrj16ha /7gion 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 thr1 tpwtq,kn8 3bough their hair and the comb becomes negatively charged. Which of the following is the best explanation tpw qnkt8,1b3for 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 glajm-xvd:m r5x n5u 2a;mss rod is brought near a neutral hollow metal sphere suspended by an insulating saxxm- 2 mv5:u5m;rdnjtring, 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 ijxb)q, 1o qid :tl5on:nsulating threads attract one another as shown. It is known that : 1qo5 ldj,:xtin)qboa 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 spheres on insuae o)6cgki tz/,1dw)n lating 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 magnitude and direction of the electrostatic force between the spheres when they k1gn) ,/)oaz i w6dtceare released?

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