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 conductr2fil;, s.mx 8cen5l hor attracts a second object. Which of the following state s x.c2l;f8nhei,mr 5lments 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 charge and held at*wvst,5qn dmtoh4 p9 wb 0e(l6 rest. Which of the following stateo9w( wqhv4lbtmd pn6s0*t5e,ments 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 re + bn v:z3) gvx bdvfnbd3lt3kmq+cm53a14;qwmains at rest when placed on a vertical wall. Which one of the following terms is most closely associated with the electrical phenomenon allowing the balloon to remain on thm 3)ddk+qm 3g3+f3 nxlvbv vqt1wbnb 5:c;az 4e 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 convention qj.hq35m gwfip0e:z5al electric current out of the paper as shown in the diagram. What is the direction of theh0z5.qp wf3jmqgei :5 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 magnitu2d) d jtuwz0s0de. The diagram to the right shows the elec2ju0) wdd st0ztric field lines surrounding 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 ff9wp j1a8o+of*9znlthe ratio of the charges q1 and q2 , where the diagra1 z9po+nofff8 l w*9jam 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 charge is placed at point P in the region nq 0ccw+, ezj(hear two charges. Which of the following arrows indicatew0cj ,z qhce(+s 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 near a metal electroswnkap;lc-whz7r 4z i (p 5;.t+yao0pxcope that is initially uncharged. p p5(tw.ph yi+kzo w0a;r- xn7 al4cz;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 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 objec;jg7l7a1qz yer++b pxt is brought near but not in contact with the top of an 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 chary+ xa7;1 e jbpr7+zlgqge 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,;ha3(pp7sbfy.hel6n, 1ue0 p)asr xr causing its foil leaves to separate. When an object is brought near the top plate of the electroscope, the foils separate even further. We coul)rep. p pefah0a 63 l (,sxyhnrb1s7u;d 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 b64l 78+us+brl fqzn0 )bc+ tobtzwb z6etween two insulated conducting spheres as shown. The spheres have no net charge. Region II has the 8 zf7lbc4ut+zzb bt6bno+r)0l q6s+w 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 their hair and the comb becomef/*,eqhfl 5uss negatively charged. Which of the following is the best explanation foq5,sf*/ elhuf r 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 cha/anjhtly )nxj6 -8m9xon/b l rz+t *h5zh0mf,rged glass rod is brought near a neutral hollow methmb+r-jan5/n nhho*yz 09xx,z8/6l)tt l f m jal 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 attr:ot s2h;e0zd vxmyd:6act one another as shown. It is known that a positively charged rod wil2e s h;6 ym:d:toxvd0zl 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 areplyv v xgv:-j8bhkks0)-aced ojvk)b8 :v-0gkxhy v-s n 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 direction of the electrostatic force between the spheres when they are released?

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