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

1#

96.27: A long straight wire conductor is placed below a com tg9ja+mullch;bs 1):pass. When the conventional current in shlab ;ml)9t+:1j gu cthe 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 b xo a7u+ i3,oh)x.hcsae cut in half along the dotted lines shown. None of the pieces are rotat,3oh axs)axu h+7c.oi ed. 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, j;.trbws24npe 1 td o/gapa( around three permanen d;(jtro na b,s .e142pwgpt/at 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 (positive) electric2l g8; u61xlek orw:ta current flows from left to right in a wire as shown in the diagram, what is the direction of the magnetic field at ra8;:kt 1ow2lx lg6uepoint 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 ab6c b +u+jm:dts tmd+cuj6bb+ : shown in the accompanying 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, whicbu0ca3; qs b:*l xty+ch representation of magnetic fi;btu+xqcs l*03 yca :beld 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 current directepaplg/ 5qn+lxy;b*bqq *6:n g d into the plane of the page as shown in the figure. Which one of the arrows shown g l bpn/b+g:;q 5xp*qy*l n6qabest 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 i+zuxax qu kv),sx8 u-7n 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. -7vus xuxux,+)8qzka 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 arehdkp0/bv;,py6 zzf /p shown end on in the figure below. The wirek/0pf; b /dp vz6,zhyp 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 9e ou6: d qt,o:l6azc uak4;ficoil of wire. A conventional electrical current is then run through the coil from left to right as shown. This will cause the Norto,:u4ot:6zqc6ku l fa9dia; eh 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 poincf2;2wms pfk , k8xr:wphx4/mt P inside the solenoid shown is2xwcfkr h /;4spx mpkw,8m 2f:
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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