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 attract)mpjip hg,s(gof .3 x-. ga+rgs a second object. Which of the following state gp( sg, .oimr.h+f)j-gx3gpa ments could be 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 is given a net negative cha0d3l..byywl w ms5 na5rge and held at rest. Which of the following d0sm.n5.y3waby w5 llstatements 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 t)fozzu kr:-7 when placed on a vertical wall.t:)zkrz-fo7 u Which 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 wire viewed end on carries a conventionakhmol.zwos ( *vbk3 18l electric current out of the paper as shown in the diagram. What is the direction o l1 b8 swh(v3*ozmkko.f 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 t/5;ze,wlu)imbls8 whms ,l , 2 have equal magnitude. The diagram to the right shows the electric field lines surrounding them. Wh;t)llu/m emzi,5 ,wslh8,bw sich 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 thx(e,ep0ka9t4fb hj w..0 c fare ratio of the charges q1 and q2 , where the diagram shown has a representation of the field lines in the space0jawe ah0xk .fe4f,tp c(rb9. 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 i51 pj a;miw)et3sjag;;vk kv*s placed at point P in the region near two charges. Which of the following arrows indicap5kat; ); igea3v1s;kjmv*jwtes 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 near4v/m d7( ; /k9u(fb otdex6t1myqs hhw a metal electroscope that is initially uncharged. As shown in the figure, the rod does not touch the electroscope. There is no charge transfer bet 1 dyhesm4x( b;/v6fm hot7udwtkq(9/ween 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 che 2 vlhwtp(.v5qf/+ xd+hw7 xbarged object is brought near but not in contact with the top of 7b.xt dq/xf hwpv+h w5(vl+2ean 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 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, causi) aoaaglm).5:jrgwp w/q: .ysng its foil leaves to separate. When an object is brought near the top plate of the electroscope, the foils w) wp:)aq g.aalyjrgo /. s5m: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 twok r):;9ge h:vzl hpuq6o5rk;g*f* ty c insulated conducting spheres as shown. The spheres have no net charge. Region II has the same polarity as yv* q6l)9:kt k cz;hg: erfro*gp; h5uRegion

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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 becox(k714iqqnmno4 m o3lfqu . -emes negatively charged. Which of the following is the best explanation for this phon x 4. o-qkluf(iqe1m m734nqenomenon?

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 rodawid+.i2)i:ss0)yz g 5q eecm is brought near a neutral holicsd+wi0) a m:iegzy q.2)se5 low 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 hung on insulating threads attraqs c/*oj7fc5d0n1xi )rvd6vxct one another as shown. It is known that a p0si*c )xv6xonc d7vdq rjf1/5ositively 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 cuo.: *cx eixv;harged 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 thx ioeu;: *x.cve magnitude and direction of the electrostatic force between the spheres when they are released?

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