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 nt6ee mz yo2w/,(xu4 qconventional current xqn(wem4, oy z6e tu2/in the 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 shown. Nni ocd0yy- i)6(*vy 3wt;ui k-cm)pgfone o no36y dcii(yf *;-p)iwv-mug t)c0ykf the pieces are rotated. 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 sprink4yh8 a4s iiy6jled around three permanent magnets.6s h8ii a4yyj4 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 left ) kyigof ,:2zkto right in a wire as shown in the diagram, what is the direcg2k,oizf) k:y tion 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 asrrsy 9jijyq,p5/co+( shown in the accompanying diagram. Wh /9pyc joyi,+q jr(s5rich 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 unde41b oiwx,i; tqrstanding of physics, which representation of magnetic field lines is inconsistent? The squares in the diagrams below simply represent tw 4i 1oi,qbx;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 dib-zj-rms)sk;wq0ga f nr+/5 yrected into the plane of the page as shown in the figure. Which one of the arr rk- ; -ajrmg)nz/+0fy5w bqssows shown best 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 in space so that the conventional current3;se 3dfom zve89y si2 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 from infinity) at which the magn98 3ei 2ss;3eoydmvfzetic 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 rwbkr0(dzo +k s2+q;n current-carrying wires are shown end on in the figure below. The wirek0dr+b n sz+rq(2k;wo 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 electrica ve ehss.s-78y,dm.v pl current is then run through the coil from left to right as shown. This will cause the dm8vs,epe7y-svh .. s 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 point P inside 3o o *0n8om k9m6ryeeuthe solenoid shown iy* k0ne3 9omoor8m 6ues
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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