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(o wh-9g nr)jzct,y 3q attracts a second object. Which of the followingn( g3o9r)ztc,yj-hw q 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 negative charge and held at rest. Which ic 4ckuugd 0q+v4lf-0of the following st gdl-4 q u+c04iufv0kcatements 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 remainst:c7p e ;di .:2i-s1cexckk0yri4se b at rest when placed on a vertical wall. Which one of the following terms is most closely associated with the electrical phenomenon allowing the ballo7.ip ; sx0c2 e e:rk tsei14-:icbykdcon 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 en)ura6; 6y y*su jl,6jjbpbhn/d on carries a conventional electric current out of the paper as shown in the dpy jr/nsaj*6b6h;y )6 jlu b,uiagram. What is the direction of the 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 hy l7cxzsi n jilo.fgbj//7 z+y6b ;-6cave equal magnitude. The diagram to the right shows the electric field lines sur/ c +biyb7.6 /ij6 osx zgylc;n-lf7jzrounding 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 charges q1 an:y67.inqs n8qtckm3h d q2 , where the diagram shown has a representation of the field lines in the space near km is7 6c. :qqyt8nn3hthe 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 zn9ys(f y7wgq,yn85u u+ c0hgis placed at point P in the region near two charges. Which of the following arrows indicates the direction of the force on the positive test chargeyc,7 g95z(nuf+w8hq ys0 ungy?

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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 that5 dax//v5r0e/16frcac s tb*u ngf8be69 oeey 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 t6fc bx/o b8f0s*1ee/9reuna5e/6v drt ygc 5a he 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 object is brought near but not in cqd.5y9q25x 7v 4my r6ndzcs cgontact 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 . yqs275qmdcr g cx d5vy69zn4to 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 electrosco )xfqn5+ oqwu ko1/yf*pe is given a positive charge, causing its foil leaves to separate. When an wof)*o 1kyxq/ u+qf5n 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 9 1rz; ynlqhx/r x29w6g2ndpxplaced between two insulated conducting spheres as shown. The spheres have no net charge. Region I6zpdg 22r nwl x9/ rxyxn;9hq1I 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 their hair and (hjy xo5in gx2;uc2 i4the comb becomes negativelcyi 2hg5jn;(o x xu4i2y charged. 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 rod is brought nearh:: )b 90d7b g/wvy aevbj:zoyx7mtx3 a neutral hollow metal sphere suspended by an insulating string, the sphere will be az:x:y h309eb 7t7bwy v/: godjx)mv battracted 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 insulatintj,p q01/wk:bs4d h:rpked- mg threads attract one another as shown. It is kn 0dq kepk t4wmpbr:/dh- :,s1jown that a 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 bases y l0g yw5ioj)p0vl-z;areplaced on an air table. Sphere A has a charge +3Q coulombs a5lj)ovp-;iwy z 0yg0 lnd 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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