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 conducta)kn; q 51ku6b4bo moaor attracts a second object. Which of the following statements qonuoa1kb 4)b 65k;a mcould 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 helg/1eon*ya / wgd at rest. Which of the followinoan/ w /yeg1g*g 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 chtk.4v 6zvbe9zid wi*-2bw, ewarged balloon remains at rest when placed on a vertical wall. Which one of the following terms is most closely associated with the electrical phenomenon all i *i2k,tw-vw4wz6b9 .zvbde eowing 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,c ;7p9 c;ygkwzdwkn) viewed end on carries a conventional electric current out of the paper as shown in the diagram. What is the direction of th,7;pdgcwz;ky wn k)c 9e 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 havep wltvbt.om-(0 7p2q8/ ew ids equal magnitude. The diagram to the right shows the electric field lines surroundinpelo/-t207 qswv8pw i m( btd.g 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 the charg4;k3 bz/auxl tdu)nvjd )d8,mk3a4sb jo4zd/es q1 and q2 , where the diagramdju bat dd3z,a ;z48 jlvk4)x/3 o/udbkm4s)n 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 i +hc22hvfcmo,; c hub3n the region near two charges. Which of the following arrows indicates the dir, uccvm+f2b o hh;23hcection 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 electroscope thatrw7r, h:ekhtt2 w w/o; 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 we;h27r oh:k/ww, ttr 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 ;fty( wlzy.4bo- tn.5 uqa e/nobject 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 on( l qanwoyf/be-45t;.u t.zybject. 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 i9 zo+ ;f8o y +jr*cgvo7b7s9 cqw7buuos given a positive charge, causing its foil leaves to separate. When an object is brj co;9qo+ou o7y +7gu87zbfw r9 bv*scought near the top plate of the electroscope, 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 two insi17*fpqr 2y4gn;s sebi;2sd yi b7tg3ulated conducting spheres as shown. The spheres have no b;1*p2 ;t 7ifidyyggqn4r7sei3ssb 2net 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 neu7i5btsce6 nd8 tral comb through their hair and the comb becomes negatively charged. Which of the following is the best 58 bn76cit dseexplanation for 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 charg2nr pxd k+axtw1cr2v6j,.joi kw/ 2-r ed glass rod is brought near a neutral hollow metal sphere suspended by an insulating string, the sp-x .iw 1pjrr +,jnvr kxc/22okw6d a2there 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 insula; w2,cp.rxa;4e9h.rnfjbbcv-g (t5xj tn zk.ting threads attract one another as shown. It is known that a positrwzcxn p.nxfrbt ;hjt,g-vk( .5 j.ce2b 9 ;4aively 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 insulating base/t18 gcs *5;p et nwdnqfb5p;es 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 illustqnnwd5 ttp 5g1b8sp;*c/ fee;rates the magnitude and direction of the electrostatic force between the spheres when they are released?

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