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

1#

96.27: A long straight wire conductor is pla(y0jk ac*v vl(ced below a compass. When the conventional current in the conductor is from south to north and large, the N pole of thv(lcay*v0( k je 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 be cut in half n))99y5hogv0 oi b mr4oqwdbe* h7d)q along the dotted lines shown. None of the pieces are rotated. Afterqvnwdho5 *7ihr) 9o) g qd9eo4)bbym0 the 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 iron filings sprinkled a v8kqss,p)el te ;p,i(round three permanent magnets. Pole R is the same as po 8plqvs,si,k; et(pe) les

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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 ruveed689 o qao/u+7x) electric current flows from left to right in a wire as shown in the diagram, what is the directionxo+q87 69udvra ee/uo 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 righ ;v2);sm7bx5j2 sdzj r 1hvjokt as shown in the accompanying diagram. Which option best represents the directb7 j; ojm2s 5vzk;hx)j d21svrion of the magnetic field 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 represen4 /bth9j 1hjoftation of magnetic field lines is inconsistent? The squares in jj /o9ht41h fbthe diagrams below simply represent regions 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 current directe6 nsp0x-tisi5e fm )gxsg5/y:d into the plane of the page as shown in the figure. Which one of the arrows shown best indicates the direction of the magnetic field associated with tx0 -6)i fm5gs/xt: sgeysnp5ihis 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 that tjo8d0 2tpiwj dsqh-a 2)55hf ihe 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 on the x-axis (aside from infinity) at which the magnetic field is equal to zero from these currenii5-8j0)sjda52d toq wh2 hf pts?

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-carryq4f39q 0 saaxa-9vmyw ing wires are shown end on in the figure below. The wvf9qwaa m9x-04ys 3 aqire on
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 wire. A conve4x :1 ngqsbaycya(w(3ntional electrical current is then run throaqns3b(:1g (ywaxyc 4ugh the coil from left to right as shown. This will cause 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 zfb4u mmq5b;k/fps9 qd u:y);P inside the solenoid shown )/9z m qf umys;;dbfk:uqpb45is
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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