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 cpb*j 54hn2krfsznh6)v ka dpg*je -7h6(3l vq onductor attracts a second object. Which of the folg(3n *6 khf*hp5b 2en64 adjz jkvhp7-qsl rv)lowing statements 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 negativezc5 l 3mbpj(v. charge and held at rest. Which of the following stmp jzv53lc.b (atements 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 w.fc76 kczmycep,u- m6hen placed on a vertical wall. Which one of the following terms is most closely associated wit,k7yc mfe u6c6zpc-.mh 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 w2 ugthdoox*+p2leh.u 1 yl ;)cire viewed end on carries a conventional electric current out of the paper as shown in the diagram. What is the direction of the associated electric field at pointgtlx+h1*. o2hu le;2) ypu cdo 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 ha:/boo fpkx vt63l,h9 vve equal magnitude. The diagram to the right shows the electric field lines surrounding them. Which of the following statements is tru:6l/ tx9bvpf3hvo o ,ke?

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 chargex37+sbb2 az kis q1 and q2 , where the diagram shown has a representation of the field lbs 7zia3+x2bk ines 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 ha* /wjjo,-1o;+tz je.ntbcrin the region near two charges. Which of the fo;- /1j+j .hton be,*azotc wrjllowing arrows indicates 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 gvdmi+g 8)0c.fr pjg34g z(eq 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 3gzqgc4pfg(jr. + 0 8gme)vdi 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 obbh*k m8;bls z;ject 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 charge is now brought near but not inkb ;* bsl8;zmh 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 positivekmcw124j(0 wapk /* mhw 5jf n.ain1ni 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 ma. 0 n cknpi1kfj(a hj2w1imn5w/w*4could 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 p1s/ )+ve3ijnvr)y hemb vq74nep6mb - )hmlz,laced between two insulated conducting spheres as shown. The spheres have no net charge. Region II has the same polarity as ei vnnmeherbp1ys7v)m/3l) +mb6v-)q 4 j ,zhRegion

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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 tw2 wxinpw+t2wxh 1zp:8h w ncvm33z-2hrough their hair and the comb becomes negatively charxw3 mv2+23ht p-wwnpi w wz2xczn:1 8hged. Which of the following is the best explanation 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 charged glass ryxgj6q;7 9/ka fdzc ;dod is brought near a neutral hollow metal sphere suspended by an insulating string, the sphere will be attracted to the rod because:gd; z fy;q7xckd96j/a

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 a s 3g9- *+1cjq1wef yuld0bmfxttract one another as shown. It is known that a pfx-0de g1u 1wys+bclm9*qf3 jositively 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 spher*f5s.1ppu2s npxaz r 4x)*rlwes on insulating bases areplaced on an air table. Sp4*.*1p5zpnxsx rrp)2fwlu ashere 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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