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 a1ae9tss;ng 2 1go9 uhdu*v0 nxttracts a second object. Which of the following statements could be true? 190n ;hxg1u 2dsgasou9tnve *
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 2z x7x4fc(fc jand held at rest. Which of the following statements is trz7fx2c cxj4(f 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 asof0t/cy o f3.g2u6nkeg6cn 1 t rest when placed on a vertical wall. Which one ogn gs6o/nc20oktc y. uef1f63f 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 wire viewed end on carries a conven gk gg8s0+u 3+n86ppxu5cxzj mtional electric current out of the paper as shown in the diagram. What is the direction of theusx gg 6+xc0un+j 83zgkm pp58 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 magnitmdjnv.6pg5 y:u w-1k yude. The diagram to the right shows the electric field lines surrounding them. Whicd p.-gm ywnu:y1 v56jkh 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 q1h8 ( yg6s- xhex6if a wl-u,zwu+n/:yla(mi*y and q2 , where the diagram shown has a representation of the field lin x(+ i*6we:uf 6i /yy m -,awz8n(uy-xllaghshes 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 pl*-c+u 6smum2b/lyo1 l x 6aqzcaced at point P in the region near two charges. Which of t2msl- 6azcc*o u u l6ybm1+q/xhe 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 rod2 z1r)pc) x1le7aqwpt(l9zkh 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(pt 17 qekz 2p)lxrlawh19c z) 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 near but not in cof m tw3.q z,0zcu)tmyqv1sx9dj; i 7(kntact with the top of an uncharged gold leaf electroscope. The experimenter then briefly touches the electroscope with a finger. ix.vqzy wut j0 1(fzs, m3t)k q;97dmcThe 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 gib+yj kc.l. u2b t-j6charge, causing its foil leaves to separate. When an object is brought near the top plate of the electroscope, the foils separate ug.lky6 .c+tb2 ji bj-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 betw.i60e7wv.ekwf2p mtq een two insulated conducting spheres as shown. The spheres have no net charge. Region II has the same ppk.w itq wmv2e0f 7e.6olarity 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 haet: o9* c c0h+dkjbo1,et/nwi ir and the comb becomes negatively charged. Which of the following is the best explanation for t+*:nc ikcd/b jeoe, wot9h1 0this 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 electricall79klhz 7t( zwzy charged glass rod is brought near a neutral holl9hzzk t(7wz7low metal sphere suspended by an insulating string, 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 hunwvrhqv)8tenhlv0jw:p0 : ; w/sria .7g on insulating threads attract one another as shown. It is0hvhlwrw na ve itw;)v0 /.r:78jp :sq 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 non-conducting spheres on insulating bases areplagd /jj;+noafwd*t3fy89k:1 cpe .g otced on an air table. Sphe8 ngof+g3*9;pe tt dj/1ocf.wdk:ayj re 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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