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

1#

96.27: A long straight wire conductor is placed beloym9: cac yjffl+na1;b9q 0tr/w a compass. When the conventional current in the conductor is from south to north anl/; 9ccr:9y nfbyjq tm1a+af0d 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 linihe 0x 58zwfe0 eq1ax3es shown. None of the pieces are rotated.h00eqw fi ex51x 38eza 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 arccrprd(i ;n7.ound three permanent magnets;r. i dnr7(cpc. 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) electric current flows from:dh 4 bh7v/vh4x0fbx 9pqi.bo left to right in a wire as shown in the diafo07hq b p .d4hxxhi94vb/b v:gram, 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 1l oy:bt4q s u(a6rxz6through a horizontal wire from left to right as shown in the accompanying diagram. Which option best represents thx66ol1r tb4a suyq:z(e 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 represyn/*en0x -*c tq;lrw tentation of magnetqr*;xtl w*cy/- net0 nic field 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 directed intfya xvm miejj.h9;(:)lr0 e1 +ax i,lho 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 t)y,rx0v1m h ;i.m ahe l9fl+ei:aj(xjhe 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 currex2 h;cb5er+h3hy( u-ln osyce- )gkgv.:vo9int 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 frv-h.lsn b(crguy)2:5cg+;yh i k3-ovoehe9 xom 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 spzx)i.-lf 1:xnr ;i.l6cnkvcyd3q; o,ah q2jhown end on in the figure below. The w3; zrnop.cahx1v ;jykiq)q.x -l :ld fnc i,62ire 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 electj ; r*nev+pna fyg*r70rical current is thenn ge0rpn;+jv7r*f * ya run through the coil 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 ipd-w /ks:x (t(,ez0k0qhdox point P inside the solenoid shown isx qd00 oet(-h(zxdk:k p/w s,i
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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