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. r)g4 r4zjfgg,j llx8wv 8 wm.*Which of the following statements could bgf 4g *rjv8 lx8lmz) gj4wwr.,e 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 negz kwy9nq. j)r3ative charge and held at rest. Which of the following statemenq3y 9 )jnw.kzrts 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 placed on a v; vm7 v,gtzewu0ba2 y-ertical wall. Which one of the following terms i,-a; y u7 tgvb2wme0vzs 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 conventional electae8w we9r;v,yric current out of the paper as shown in the diagram. What is the direction of the associated electric field atv 8 rwaw,;ey9e 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 the rii,b22wfz , d b7stnxp r*gt:qpup(s;1ght shows the electric field lines surrounding them. Which of the following stpdp2s2;qw:br( t fxtn,p*,zib g us17atements 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 shox+i0z6f4 bhvx wn below, what is the ratio of the charges q1 and q2 , where the diagram shown has a representation of the fieldh +4xf6zv0 bxi 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 the region near t-;e3n yggyf+r wo charges. Which of the following arrows indicates the direction of the force nf rg +;g3y-eyon 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 ij*+kdgs.. pqj2u bo.near a metal electroscope that is initially uncharged. As shown in the figure, the rod does not touch the electroscope. There is no charge .iq.jk+ps. gu*bj 2d otransfer 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 n 3i21 bbtne/cpot in contact with the top of an uncharged gold leaf electroscope. The experimenter then briefly touches the electroscope with a finger. The finger is rtc3 b /enpi12bemoved, 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, cy*o aj4ki;1om/7mzi v ausing its foil leaves to separate. When an object is brought near the top plate of the electroscope, thia7kov1*om ;zy/i4m je 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 c/hy iwc*x3z:;gv*wqeh p)zb/g5 ez6is placed between two insulated conducting spheres as shown. The spher6yv;zx w/ :35eg)b /qeg*h h cpicwzz*es 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 through;4 ih tcz1*srg31vq;t oie m6g their hair and the comb becomes negatively charged. Which of the following is the best explanation for thv1qm og 4ri*;;tt e6shc iz31gis 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 rod is blb4//v1grvc/rwpok ) wba/ ;vrought near a neutral hollow metal sphere suspended by an insulating string, the sphere will be attracte1ab vp//vok/l wg4v/rwr ;cb) d 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 attrajo ,m,gyz09 f fb(hhp*ct one another as shown. It is known thatof0y*(9 gmbhfp, hj, z 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 insulativuax /(4j1b /cp z.0 y fe+srmxd1j(.:rhm aoxng 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 d (xj0d1y( :mszx.1.o /jcr4+epmafha brxuv / irection of the electrostatic force between the spheres when they are released?

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