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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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 ob9ucn,tl:r0f gz6l j.a ject. Which of the following statements couldc:l far0u zl9,6nt.gj 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,hs cgmg ,cq qh*5,vv5 given a net negative charge and held at rest. Which of the following state5,scm ,, hgq *c5vhvgqments 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 remaikc+ o1i-r6d*wv/uhz enmck17ns at rest when placed on a vertical wall. Which one of the following terms is1zukhm 16nk- +c*e/wdo7ircv most closely associated with 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 wire viewed end on carries a codshlz0mbep 6* p0 -;zbnventional electric current out of the paper as shown in the diagram. What is the direction of the ass 0;hmpb-l0b*szde6p zociated 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 magzrj n x.ge n.kgj3*d:3 m*p/ignitude. The diagram to the right shows the electric field lines surrounding them. Which of the following statements is true?j.p/.e *r3mx k g:n*jgi3g dnz

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 s7,n uv jsokm87ft .p4below, what is the ratio of the charges q1 and q2 , where the diagram shown has a representation of the field lines in the spacop7u j,k8n4 vsf.7m tse 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 atemwpxgnfzpt- e-at -j1/8. -t point P in the region near two charges. Which of the following arrows indicates tht8/ t ze-pfpw-e1xg.a - j-mtne 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 neap7 7lgnvt+br2qb*umv3i yyos t(ul1h3: 11zp r 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 foll31nzqi7 :ytb+rv uh og bp 1lt v2lpy*u31(ms7owing 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 object is brought n *lz8u3 6cnm -)slkieoear 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 c8knlu m6i *z3oes-)lcharge 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, causing4*d )xh (fe- mgwqw;md its foil leaves to separate. Whdh x-*)dq4ww(mm;f egen an object is brought 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 beb9dedz/yh 7jo+4 e ye0tween two insulated conducting spheres as shown. The spheres have no net charge. Region II has the same pola d+ehy/7dbe 9yjo 04ezrity 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 j ucz9sc4x /igft7 98g yc,p*ybecomes negatively charged. Which of the f, x yjtcf/g*cg97z4ycs u9 p8iollowing 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 t1rv,5p bt4- v+nz7,ykdrsl s zd1in5electrically charged glass rod is brought near a neutral hollow metal sphere suspended by an insulating string, the sphere will be attrac vpk 5nnr1z 1+vsdrylt5,4 ,bdsti7-zted 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 hun76hrvb:kz k / n+:hthrg on insulating threads attract one another as shown. It is known that hz+ nr:bv:t67 / kkrhha 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 on insulating basep0 ,9iqxn/8a2 cvjfkv s 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 illustrates the magnitude and direction of the electrostatic fnfv0 x qc a,p9j28/vikorce between the spheres when they are released?

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