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

1#

96.27: A long straight wire conductor is placed below a compass. When tj 92h mj 0.gwn9javyh;he conventional current in the conductor is from south to north and large, the N pole of the2 y09hvn 9mja;h j.jwg 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 b7v, dygyunm 1 5ek0)oae cut in half along the dotted lines shown. None of the e 0 ykumoadv)y 1,ng75pieces 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 sprinkled around three per- ate 0w0tk*dumanent magnets0ae0kdwu*t t -. 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 flow *ph* 46v) u dpyho8ycwoi-4lls from left to right in a wire as shown in the diagram, what is the directi 4uld)wi- 4ov6y *8lhy ppch*oon 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 xwz dp0 nb)bd7py) 6:wleft to right as shown in the accompanying diagram. Which option best represents the direction of the magn6bp:w)dxbzd 0)wn7pyetic 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, whicsvb9k4y*a od 8h representation of magnetic field lines is inconsistent? The squares in the diagrams below simply represent rvs oaykdb49 8*egions 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 straightiixnt0 7kh42 j ,x* n51d36bwtdrvfr ikv z.;v wire has a conventional current directed into the plane of the page as shown in the figure. Which z v,ki54 xi irnf3vbd2knt1x tjd67*.0rh w;v one of the arrows 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 soj1mk )4ib bh9f 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. In which Region(s) is there a place on the x-axis (aside from 4hf)mbj19b ikinfinity) 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 i (,se.5f4c tafhs(hctsq 70 oxn the figure below. Ts sff5 e4,th qx0(a(.toh 7ccshe 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 ;g:- 8nq396ebgw ko33i0kgzszgi oupvc6r7 ynear a coil of wire. A conventional electrical current is th;obgn 0kgu6ecwg7pi 6-y3 z9:v3s8 oigkz 3rqen 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 (q cbc18nj1mmthrough point P inside the solenoid shown1nc(jbq81c mm 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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