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

1#

96.27: A long straight wire conductor is placed below a compass.n4rqy:-8go y/r obg 2s When the conventional current in the conductor is from south to north and large, the N pole of the compa sgyn8go2: b4/rqro-y ss:

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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 rsk+qs ig:d7l5(5wc lare to be cut in half along the dotted lines shown. None of the pieces a:q 5r wsd5sg(i k+7lclre rotated. 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 iron fixtoj;kdo94-* kg 2 1fdrrt.9kne xwl*lings sprinkled around three permant.roek9 g *xxo1 d4d2-k9 fr*;jtwnlkent magnets. Pole R is 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 (jo*)-b tkvcv p ,b1wq5positive) electric current flows from left to right in a wire as)bvc1kb,qw -t ovp5j* shown in 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 flows through a horizontal wire fromk /x icws*0td p5*2fyn left to right as shown in the accompan5*c wyn*tski df2px0/ying diagram. Which option best represents 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 representation of magnet)ux gjo53 v+aaic field lines is inconsistent? The squares in the diagrams below simply ra5gu j+ox) av3epresent 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 conva i4i llfd7zn2(q3f y;entional current directed into the plane of the page as shown in the figure. Which one of the arrows shown best fiz2n7a 3l q (fd;4yilindicates 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 so2 +ez*y*pp umh 0: pve,-6cnuyr.rot *hixtk1 that 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 Regi euh,e yot.rvkpzc:*2 1+y6hp*mnp-* uxti0ron(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 a6ie-l3gg o*xk6 j(empre shown end on in the figure below. The w *jg6giemo -lkp3xe 6(ire 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. A6qo cdgx :4;kupw+fp( conventional electrical current is then r+k g(od:6w ;u c4xqfppun 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 through point P inside the solenoi1+ e v-t1ek9 gyu z:heeobf1g8d shown :vfe u- 9k ey1o+gtb1h8zee1g is
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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