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 cops,-eo hg+ 4: fwy6wkvnventional current in t: ey fhv4k-,p ow+swg6he 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 dottecud dx.ghw 6(;d lines shown. None of the pieces are r ( dgcxwu.;hd6otated. 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 2ucx.+ 7cxnfyjv*pn 3around three permanent magnets. Pole R is the same as poles uxy.n7nj v2xp*c 3+cf

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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 current flows from left to1,d 2h ty1cack right in a wire as shown in the diagram, what is thec2 ad1 kh1ct,y 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 sa vl9/(2 epu;iwt7 5andx9b mhorizontal wire from left to right as shown in the accompanying diagram. Which option best represents the direction of the mv2mwi9( dnle ;p7t9busx/5a aagnetic 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 ma z6.6jk o6ly 5n:bpbx khdq:5zgnetic field lines is inconsistent? The squares in.:x zk oj6qhk 5:y6zdnb p65bl 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 current directed into the plane o 8cjmn mme)2 .rkmrll9/*:vv vf the page as shown in the figure. Which one of the arrows shown best indicates the direction of the magnetic field associated with thisvm rlkn8evjm* m :rm)c9v2/ .l 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 il :xdqw(r67+ngelw1 mn space so that the conventional current in the left wire (2 A) comes out of the plane of q1 wllg7 +:dwx6r(ne mthe 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 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 currem5ux n)q r.ym1nt-carrying wires are shown end on in the figure below. Tmxyqn m5)r .1uhe 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 electrg 96qjh,jyk (rical current is then run through the coil from left to right as shown. This will caujyr,jg(q6 9 khse 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 throo)gur4zil2.cf7;f 1w fhpj u 2k.iz y1;cepe7ugh point P inside the solenoid shown is fo.;2ifrzc2 h7)ckz f leui .7wp1y;e4pjg1 u
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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