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

1#

96.27: A long straight wire conductor is placed below a compass. When the conve : de 3thizn/u6wbjd/3ntional cnz/6:jie3w 3tdb /hudurrent in the conductor is from south to north and large, the N pole 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 be cut in half along the dotted lines shown. None cim y3: xozy1 i7bt8b-of the pieces are -cy1i8b: itb3xoyz7 mrotated. After 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 iro7)xo8h -b:kgq zj0vikn filings sprinkled around three permanent magnets. Pole R is q): 7jzkhv kx-g08obi the 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 (w d-fz6o;u f fekds1ttl(1w *-fmr8u (positive) electric current flows from left to right in a wire as shown in-uwdzrff;tuokl-8( fwfm 6 d*1 (ets 1 the diagram, what is the direction 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 flowbvq oy (.i(ypz3 +.vxhs through a horizontal wire from left to right as shown in the accompanying diagram. Which option best representsb vhzq(y+.xvoy(pi 3. the direction 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 representatio eeaqzb o ;(qg3;5zzdz8(5 srdn of magnetic field lines is inconsistent? The squares in the diagrams below simply represent regions of space.zszag;5 (rbeqeq;o 3(z dzd85

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 directed into the :6 s56;ru r r: q;o8kqfavvh1 vx8mfmaplane of the page as shown in the figure. Which one of the arv vorm8mr:8qfq1a;r :66 skv; fxah5 urows 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 thatfc:dj 2crz fnyonc 26 :rqu;0(nnxn6 ) 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 wh 0f:jnnrq 6cu df2n); o(crxcnn:62yzich Region(s) is there a place on 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 figure beloxsp h65 l9u28/ aqzhmgw.l569gsz 2 aqp/ux8hmh The wire 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 conventional ,q 6ta*mi6frbelectrical current is qfi*m6tabr6 ,then run through 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 th 0.ea+wjzuz.) sk (yhz jgc3-wu,1 xzxrough point P inside the solenoid shown is e0wsy )+z xj1 w.g-.uzkuc,j(zx 3hza
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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