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 cfs976mv yqr r*)v j)team 9tp7onventional current in the conductor is from)6eqpym7v *t9st9 rjrmf) va7 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 ar 5n7-tc0wyw noe to be cut in half along the dotted lines shown. None of the pieces are rotato0c57y- nwtn wed. 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 arounn7py 2;b u0 oworl0r i8/tgn9qd three permanent magnet ; 7 nq8 orywnub0ilr092tg/ops. 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 (:g7yye t: eg cjjphd7qmgt ij67+t. 38positive) electric current flows from left to right in a wire aj7 je cm 3typ 6d:e7i+ttjgg:g87.qhys 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 from left to right w7smnbf/ vp/ tgd5g,-as shown in the accompanying diagram. Which option best rfdmp /svn5g/ gt -7,wbepresents 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 und)cb*v0w2,-j n at ijhzu5nx *r0ms +lxerstanding of physics, which representation of magnetic f5 *0ba2+jzvj i*0snmnltcu) rxxw- ,hield lines is inconsistent? The squares in the 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 curre(6x4oz o;l.t6dpxp tbnt directed 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 this wire at the l d.pzpoxtx( ;4blt6 6oocation 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 the conventional current in thqbba -s) fc4*ke 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 oba* k bc4s)-qff 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 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 shu - 5nxk7,a6p 8edlvtwown end on in the figure below. The wil,v6un 8wpak txd7e-5re 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 convenxv t6unt0l;.mtional electrical current is then run through the coil from left to right as shown. This will cause the North pol tvxt.0nu;m6le 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 paui3l7y k,ms, 3cu5nwacwn xi1-p0 uv4 ssing through point P inside the solenoid shown is wvau30xc 1nplc73 ysi,i um ukn,-54w
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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