magnet and magnetic field lines - 题库网 (tiku.one)

1#

96.27: A long straight wire conductor is placed below a compass. When th1kv:nhnoea7co. og-./pbsg0.w( fd be conventional current in the conductor is from south to north and large, the N pole hew dn.gfc7(-0 /ns:g1kob apoovb.. of the compass:

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2#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

97.17:Two bar magnets are to fl8vo-1h; b w)xu6svi be cut in half along the dotted lines shown. None of the pieces are rotated. After the wfvl6s) 8oh u1xb;vi-cut:

A. None of the halves will attract any other.

B. The two halves of each magnet will attract each other.

C. The two halves of each magnet will repel each other.

D. The two halves of the top magnet will repel, the two halves of the bottom magnet will attract.

E. The two halves of the top magnet will attract, the two halves of the bottom magnet will repel.

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3#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

98.21: The diagram to the right depicts ihw-;6 ag f19jx0 mpbnsron filings sprinkled around three permanent magnets. Pole R is th9-m;s61gfa xj ph w0nbe same as poles

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4#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

99.04: If conventional (positive) electric current flows from left to right in v,pdnb)vub06kbq e;/ a wire as shown in the diagram, what is the dire /0v 6bb);kpvunq,db ection of the magnetic 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

97.02: An electric current flows through a horizontal wire from left to right asj*hxku-5ote cxbz,) 6 shown in the accompanying diagram. Which option best represents the direction of the magnetic fiej-ec, kboxxz 6u)th*5 ld at point P?

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6#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

06.41: From our current understanding of physics, which representation 0ndppmf+ 7 1 kj-ld6wrof magnetic field lines is inconsistent? The squares in the diagrams below simply represent regfw+kd 67p d0n 1lpm-jrions of space.

A. B. C. D.

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7#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

12.28: A long straight wire has a conventional curl7:;b(h n h85rouxlc nrent directed into the plane of the page as shown in the figure. W h(h 78nn xorl;lc5b:uhich one of the arrows shown best indicates the direction of the magnetic field associated with this wire at the location labeled P?

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8#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

17.33: Two long wires are fixed in space so tha:at2o a(vgd ph8kk+ n.t the conventional current in the left wire (2 A) comes out of the plane of the page and the conventional current in the right wire (3 A) goes into the plane of the page. In which Region(s) is there a place kkt+o hna .gd :8pva(2on the x-axis (aside from infinity) at which the magnetic field is equal to zero from these currents?

A. Only in Region I

B. In both Regions I and II

C. Only in Region II

D. In both Regions I and III

E. In both Regions II and IIID. electric field strength divided by magnetic field strength

F. charge divided by mass

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9#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

04.31: Two very long current-carrying wires are shown end on in the fig badi 9gci(0n0ure below. The wire on b9 0d0(aiignc
the left has a 4A current going into of the plane of the paper and the wire on the right has a 3A
current coming out of the paper. Disregarding the case of x → ±∞, in which region(s) could the
magnetic field from these two wires add to zero on the x-axis.

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10#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

02.31: A compass is placed near a coil of wk7ki gopb2 bipu55 fud4 j5gf .*v;nl8:htb7wire. A conventional electrical current is then run through the coil from left to right as shown. This will 4jub;g 5 *k7vbh55piop:gltkf8. b2iw unf7dcause the North pole of the compass to:

A. point toward the left

B. point toward the right

C. point toward the bottom of the paper

D. not move since the magnetic field of the coil is into the paper

E. not move since the magnetic field of the coil is out of the paper

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11#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

05.19: The magnetic field line passing through point P inso/y+or(+p dq side the solenoid shown qo +(dyros +/pis
directed

A. to the right.

B. to the left.

C. downward the bottom of the page.

D. upward toward the top of the page.

E. in no direction since the magnetic field is zero.

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12#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

05.36:When one compute the square root of the ratio of the permeability of free space to the
permittivity of free space, one obtains $\sqrt{\frac{\mu_0}{\varepsilon_0}}$= 377. What is the unit of this quantity?

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