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 azn+wh9; 4ym3khxw u;5(feuzsk op 1s3 second object. Which of the following statems 93uh +5(mwonxkuke z;y1fsp; w4hz3ents 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 as6/yx y, gy.h bj,1bzpnd held at rest. Which of the followi,bx,hy y/1pszg.6ybj ng 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 charged balloon remd wxlag uoea: skc l9*;l7/uyh90v 45cot o-5cains at rest when placed on a vertical wall. Which one of the following terms is most closely associated with the electrical phenome4 ;9lv7/*layda5t locxuwos9 uc h0kocg -e: 5non 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 zl;+: vcbk(+fe(una 648pm v0jlasoz carries a conventional electric current out of the paper as shown in the diagram. What is the direction of the associated electric fi lov+0(+a:mz4klcaesz p (b n 6vju8f;eld 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 equad(zm izdz l.i;.p0- fil magnitude. The diagram to the right shows the electric field lines surrounding them. Whi0 z- .zd(.piid;mflzich 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 isg skc27 ygs tw8t/r4son.ei6: the ratio of the charges q1 and q2 , where the diagram shown has a representation of t7sg kt cg.e8y:s264i/wsonr 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 lx,e1t:.iy u/z z vmhza.74s zP in the region near two charges. Which of the following arrows indicates the direc txz:hz.l4u, zzams v1e./yi7tion 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 cha2rv; /7ftibks7 agic5+ +gq4jwmw3ul rged rod is brought near 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 leawrmiau itk/b +7 cl5s w23v;fq4g7j+ gves 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 object is brought near but nor/3+xi qhltr5zo ke 52 3wp9;pds- siet 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 in contact withe5/ z pilqos5t-dsiw9 pe +;rkh3x32 r 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 cha+ uba zk6p zm,:p.uya1rge, causing its foil leaves to separate. When an object is brought near thepz kum ,pbyuz16aa+.: 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 insaswgr r-i i/7n /1l7z+b9t fgbulated conducting spheres as shown. The spheres have no netb +izntflgar/irs9w - g/ 17b7 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 neutral comb through their hair and the com3h; gyow0v yg3b becomes negatively charged. Which of the following is the best explanation for this yw;0 h gyvg3o3phenomenon?

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 chargedi,dra4pnnd7iw ot465 glass rod is brought near a neutral hollow metal sphere suspended by an insulating string, the sphere will be attracted pdio4 4nt7ia 5d6,n wrto 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 insulacnthyj tr4g h ;4q;2p h:k8hydvw. 9i7ting threads attract one another as show y2 j74 yt4hiwht grn 8hhq.k;c9vpd;:n. It is known 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-co+j/u,adcbvppowqc to/ y*4 0;nducting spheres on insulating bases 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/ v;wcpbo u/ toq+4pya0d*j,c magnitude and direction of the electrostatic force between the spheres when they are released?

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