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

1#

96.27: A long straight9t ff6,p h3gjd wire conductor is placed below a compass. When the conventional current in the conductor is from sou htgfp 9j3fd,6th 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 oaxz txwj/v6moi-0* 2uf txwoa2zj/ txiu *m6- 0vhe pieces are 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 filings sprinkled around thriprd: *+ktu9f :f /bwwee permanent magnets. Pole R is the sam+9w/*:rb: tkfpdfuw i e 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 c cloz*m:-58nht2 qki wurrent flows from left to right in a wire as shown in the diagram, what is the direction of the magnetic field at point P? z2n*h :m t5wq l-kcoi8

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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 awo nhj7zat8/ 5s shown in the accomnhj5 oazw8t /7panying 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 of5rl i.nbdg(t 3 magnetic field lines is inconsistent? The squares in the diagrams below simply 5brd3(tgi .n lrepresent 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 directed into the plaogx ,ohn;99x w6cn /vzne of the page as shown in the figure. Which one of the arrows show/xv wn69ch9x gon;o ,zn 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 /l b;zd1, ezehin space so 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 Region(s) is there a place on the x-axis (aside from infinity) at which the magnetic fielee hzbd;1lz, /d 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 below1-qjm 7twd : zb w74okl5)kzqw. Th)7wkmzo7 zltbq1dkw:-4 q wj5e 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 con.:qtz ro73g)ufl f7ukkv)6u12yldruventional electrical current is then run through the co6fduk3vkr)g to r u721: uf)qul.ylz7il 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 ikw) wogi) 0n)onside the solenoid shown is i) kwwog)) 0on
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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