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. Which of theftt.iha;0)rx following statements could bexr;h0.tf) i ta 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 res) 2-zqjqkew b),-b( hhqk2 hlq3s5vhrt. Which of the following statements is true?b3-52sqh- lqqh)bk)h hev j( w2rzkq,

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 charzld1k57aq( bm ged balloon remains at rest when placed on a vertical wall. Which one of the following terms is most closely associated with the electrical phenomenb l(7qka15zd mon 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 convhs2 ; d0prim2wentional electric current out of the paper as shown in the diagram. What is the direction of the associated electric field atp;h22d rsmw0i 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 chargesnhho0ch( tb8i 0js:h7 1 and 2 have equal magnitude. The diagram to the right shows the electric field lines surrounding them. Which of the following si( h 7s0jc:hhht on0b8tatements 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, whxwb 8 ovu5*j.v.;2wavz0jf*nuhq/l /9oos w m at is the ratio of the charges q1 and q2 , where the d8nqo hj2* w0 f/ov.svx. wvzw*l9o5u ambj;/u iagram 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 near two 4 j)vq :vojpn 0uc*0s zhx1n+hcharges. Whichzq0*n+0 sv1x4 juh ohjv:cpn) of the following 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 o:8xi mveu)upy/1x0 wcharged rod is brought near a metal electroscope that is initially uncharged. As shown in the figure, the rod does not touch the / ui80 upxoxw v):mye1electroscope. 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 buxa t2ua ;tty iev;h+//)iv:ot v2 (dcharged object 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 b/yabtuoxt:vti/2)e vt ;dahi2(v u ;+ut 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,,i*5er a 9f) 9nrkdbtu causing its foil leaves to separate. When an object is brought near the 99eratb)frn5k,i * du 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 betw)yv2)r)u qoa0.f3 xk h3 0rk u2krewmoeen two insulated conducting spheres as shown. The spheres have no net charge. Region Ie )moawr2xuq 2rvkrh)3kyf. u)0k o3 0I 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 n-vpd)uxq.n vev2z ru +p/1,b their hair and the comb becomes negatively charged. Which of the xz/uu.r d1 - 2,v)p+nevbpqvnfollowing 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 positiowl : ydm9gkxb1cmkn /1m4/)pve electrically charged glass rod is brought near a neutral hollow metal sphere suspend/ bp)x m:ywgk9dl1mk41/c on med 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 metalh azqji7p 3v0n, u5il0 spheres hung on insulating threads attract one another as shown. It is known that a pop0 , nzh7i5liq3uj av0sitively 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 bases arepl7 6 vic9-o7kqf*ahjcb aced on an air table. Sphere A has a 7a9v7 h ocibfcq-*jk6 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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