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. Which of the fo pfn4- 0zeog;f 5o.qscllowing statements could be trueo5co0es;.p zg f- 4qfn?
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 anxbxnq2 it1 +v61vvub;7*omykiy 78umd held at rest. Which of thebvm6u m1 vykun 8+ t;b7qoixi72vx1 *y following 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 restul0i3d+21b nz4twowc when placed on a vertical wall. Which one of the following terms is most closely associated with the electrical phen 3w 41+uwo0z ctdln2biomenon 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 currenvt4/o 5uzh gt*n1do7kt out of the paper as shown in the diagram. What is the zgd5 v7ot* 4huonk1/ tdirection 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 ha1t7jbq irvfv;uv7vs6 /: g+updi9tq / ve equal magnitude. The diagram to the right shows thfvjqr6 :u7pu/7d+ivt t gsi vqv1b /;9e electric 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 ratio6 w 8p .k;1jm1snyx:0-sjne bx:x aluk of the charges q1 and q2 , where the diagram shown has a renu x -k. exw0k1a jl:xspby6 8;js1:mnpresentation 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 nk2; dlp88ikb qhwwu.9jl*6 s g6*gvd the region near two charges. Which of the following arrows indicates the direction of theu.kvi hkb;gdwwl*nj p68q d2g* 6s98l 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 5grmq,e,juwv 78 cqemcu +dz7n/.gz ;charged 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, nqc zz. ,um5+ /wgj 87r7udmq;ceg,evbut 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 neac4k:,uf7rnxe h )y il1r but not in contact with the top of an uncharged gold leaf electroscope. The experimenter then briefly touches the electroscope with a finger. The fi1ku) , yhxf 4l7nc:eringer 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 ia2rlr2az0pi86gpw ig d r :7/xs given a positive charge, causing its foil leaves to separate. When an object is brought near the top plate of the electroscope, the foils separate even fgi87wp2/lx6 r0 pgr2ziada:r urther. 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 sp1i-4tw dirv9,v b(j0xrfz s1s.uc (kwheres as shown. The spheres have no net charge. Region II has the same polarity as wsxu.1vr,fjdr( (i-s4vc9zw 0tkb1iRegion

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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 becomp4sw 686v oaf)ciftp :+do23jeibl) des negatively charged. Which of the following is the best explanatpt:fewlo d4) 3p8 ib+oja6)c 2 vsfdi6ion 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 electricv /)m)y+ + r*ebt6tqc00rwisnfou f;ovf)*z zally charged glass rod is brought near a neutral hollow metal sphere suspended by an insulating string, the sphere will be attracw));u0 )f fn vqbr c*/oevzri t+o+*6fzy0smtted 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 insulating threads asb.)y1s gp2y nttract one another as showsbysn.21) yg pn. 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 chao1cwmn,gw2f) - k /mtlrged non-conducting spheres on insulating 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 th/wtc1 fo 2n), mlkgwm-e electrostatic force between the spheres when they are released?

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