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 9(l 2plc12t7w -hr vi 42tbrznsp,o hea second object. Which of the following statements could 4nb l1i2o2rvhw e (72- trp, 9ptlzhscbe 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 ner(jg9f r( b/ e1;xmuyyt negative charge and held at rest. Which of the follryf( ux /(g1jm9ye;rb owing 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 cidarpm hno4 w:nwfk dn*c+) -2k4o -o5harged balloon remains at rest when placed on a vertical wall. Which one 4knh5modcn:o*fwa-w kpid2+r) -4 o n 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 viewedni04ha8 1g xf/6p osoz end on carries a conventional electric current out of the paper as shoig01fx/h8a oo46spz nwn 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 equayn8 l)g ywpz1 2.ny.r:llh(bcl magnitude. The diagram to the right shows the electric field lines surroundi1l8 zbrg.pwy 2 hcl )nn:lyy.(ng 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 t5 qs*tizv3lx 0-hdp0jhe charges q1 and q2 , where the diagram shown has a representation of-z30xlv qjt*phi50 sd 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 .yduv7 +wncg1l/2aql.+ ofopin the region near two charges. Which of the following arrows indicates the direction of the foc agfuol+27odn vp .ql+y w./1rce 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 near a met0kjr cl.vt (o fft +-.pc4r*tnal electroscope that is initially uncharged. As shown in the figure, the rod does not toucojc. (r4p+ vr n.ftt*ftck-0lh 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 charged object is brought near but not in 6z3.ylo(ap7dd ded+ ocontact with the top of an uncharged gold leaf electroscope. The experimenter then briefly touches the electroscope with a .dd7y( zp3delo6+od afinger. 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 isg,o; *vcdl agd59 0girb6ji/m 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 further. We could /0;idg irdm6 9*vabgcg5j o,l 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 ld 0dm u.+ c.qcud0tjnn0 ;;easpheres as shown. The sphertna u0+ld;c u; cedmj .00.qndes have no net charge. Region 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 thrto7 s ;ti(l,e j mmwrxpk r0z/+a..e,oough their hair and the comb becomes negatively charged. Which of the following is the best explanation for kpj/ai;w re s+m o,r.t m,7ex .oz0(tlthis 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 rol-t6rxc08m clwv j:i;d is brought near a neutral hollow metal sphere suspended by an insulating string, the sphere; 6vxmlr-:clw ci80 tj 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 sphe(4opdcb3* 4ahyxn t :p+hwe3v res hung on insulating threads attract one another +x tcev4aohb(:yp3*w nhp 43das shown. 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 charged non-condsfewvg x-:.7 uw3zg t e/1sdx6ucting spheres on insulating bases areplaced on an air table. Sphere A has a charge +3Q coulombs xwsgw gs:3/ 7ev. e-df x6tzu1and 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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