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

1#

96.27: A long straight wire conductor is placed below a compass.e ltzsb/y3(fywfa59 2 When the conventional current in aeyfw/92bsz(l t f 5y3the 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 showv;n ;zn 58:cya1 uzgrem;prk(n. None of the pieces are rotate ;pmncn: 1vu5(rkzy8r ;ae;gzd. 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 spri/ jjc.1ghuj g:nkled around three permanent magnets. Po g1jguh:.jc j/le 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 conventionz5f2m-urqtq cbe10 s sals/n4;s )4cxal (positive) electric current flows from left to right in a wire as shown in the diagram, what is the direction o2/n ruf5cs4c 0l-eszmast4)xq sb;1 q f 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 currenv0y20iv 3 cqnmt flows through a horizontal wire from left to right as shown in the accompanying diagram. Which option best represents t v0n2v0c qi3myhe 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, wxkhzt v7d4-gx le,)t5hich representation of magnetic field lines is inconsistent? The ,ttv5-4le)d7x xzkg h 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 congr).+;p*qc+(jjkzd .h gb annventional current directed into the plane of the page as shown in the figure. Which one of the arrows shown best indicates the directbkr( z+h;)gnc nj+pg.aq jd*.ion 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 that the conventional current yj9gs::y 0o x8cwzj z6 9horw:in the left wire (2 A) comes out of the plane of the page and the conventional current in the right w9rs:89hw6: xjgjo wyyc0z: zo ire (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 current-carrying wires are shown end on r )u h-(dpm2rain the figure below. The (h-rar2)mudp 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.0e1dphs6 iu p5bb 4ly5 A conventional electrical current is then run through the coil from left to right as shown. This willb4ludp 55bhps61y i0 e 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 plln .)0n9ms vzkmm /orw4.h 0field line passing through point P inside the solenoid shown o s0lnpr./0mhznm k 4v9)wml.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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