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: 匿名未登录开始时间: 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. Whi6amv4h j:v2po 3/r 5ry.qzlip ch of the following s:4iv5o6/hra zyj2pmv3 .p qr ltatements 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 chargeu80q( f1cky3p6 xvqdv and held at rest. Which of the follx 0p qq361 kf8(vdvyucowing 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 rest when placed o-nkx0w8e-qq/o (r er,p mk0l fn a vertical wall. Which one of the following terms is most closely associated with the electrical phenomenon allowing the balloon to rx0q wo rmn- k ,r/-8ef(kpeq0lemain 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 carrie/a op5/kn*fo :u3n 8:qrizamg s a conventional electric current out f ma8qn*/u:no/zkarg: 3oip 5of the paper as shown 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 equal magnitude. The diagram to the28fl(* djixv 8chabo4 right shows the electric field lines surrounding themdo8i *4b fvl hjac(28x. 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 s6f7 8 cav thl6zisxl,7w+cxi7hown below, what is the ratio of the charges q1 and q2 , wh 6li8wc+cv hl7taiz,7 s x6xf7ere the diagram shown has a representation 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 cho+iziprn4z 9ec9 vjn j)o0g;9arge is placed at point P in the region near two charges. Which of the following arrows indicates the direction of the force9j; o nz 9gz40cv j+)rinp9oie 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 b1i2a: yac6ch9zn j6 tbrought 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 near the top of the electroscope. Which one of the following cho6ay1tch9: b2i a jzc6nices 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 contact with thz;qx rdq (wukpvnr-m+,vy8 1iak)r 26 e top of an uncharged gold leaf electroscope. The experimenter then briefly touches the kkqurrvz +6ami y ;(rdp1,)q2nvx w8-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 charguiv.n 46yl1pu x7ao-oe, causing its foil leaves to separate. When an object is brought near the top plate of the ele vui-6 x71n.4la oouypctroscope, the 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 is placed between fmf-:s0o(. utq9k keztwo insulated conducting spheres as shown. The spheres have no net charge.sf( ot0k:q9.zuf mk-e 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 cwi1xyn 4wbr+)t i8y3fomb through their hair and the comb becomes negatively charged. Which of the following is the best explanation fo3 tirn)wwfy4 yx1+8ibr 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 electrically charged glass rod is brought ne90ub-zyvc7 .a /p ii 79zofso*kaweo5ar a neutral hollow metal sphere suspended by an insulating string, the sphere will i wo7o facoib7*5p.sz9kea vu-9y0/zbe 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 attra2 v ,xj vfzp2yba+n*1nct one another as shown. It iz njv2b1xa npyf +,*v2s 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 one4y 2h/ah8u6vdr x2 cmvg 3cd: insulating bases areplaced on an air table. Sphere A has a charge +3Q coulombs and sphere B has a charge +Q coulombs. Which vuc e h4yc2grh28a d:6/3dmxvof the following correctly illustrates the magnitude and direction of the electrostatic force between the spheres when they are released?

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