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

1#

96.27: A long straight wire condu gy8iney ,4s3 d,(lnjhctor is placed below a compass. When the conventional current in the conductor is from south to north and large, ne3h8,dy,s nlgjyi(4 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 a2ph xr 5*pbwkrvmv7k *. b)- d1+zgww4pjm(bin half along the dotted lines shown. None of the pieces are rotated. After the cuww-b k+) *mdrj7 (brvmpg*w vzk142hxp.5pbat:

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 filin p.l q11j9pyrs6v,u 4s lpsgr*gs sprinkled around three permanent magnets. Pole R is the same as poles rp*9plysqsvr1u6g , lj.1s 4p

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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)g. m49 jv4logp)7h hjn electric current flows from left to right in a wire as shown in the diagram, what is the dire )ovhjggp.ml4 jh79n 4ction 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 righvh 1w,--epb m7f n0g 67kv fhtro0iur/t as shown in the accompanyin r fhpw - o0 /nb7v6iu,e10-grkmt7vhfg 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 p:j/yx13 r* hoh bcn4tohysics, which representation of magnetic field lines is i/1br: hc yt o4nxh*jo3nconsistent? 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 intnd s87-al8 wm yuq,w+ao the plane of the page as shown in the figure. Which one of the arrows shown best indicate nl8um+ ,sq-ay8 wd7was 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 : /iq2ctn bkjnt05j hge- )c8xfixed in 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. In which Region(s) is there a place gb/2kq 5 tjnj i8c-)0ec:hntxon 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-carryin -vrb,t28zuuwk + 1jwmg wires are shown end on in the figure below,w zwkv2 bu18utmrj+-. The 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. A co zt: had m f3rbu,d-k77jz2yi;nventional electrical current is then run thro72rj-azdzmk;,tbf i d:yu 3h7ugh 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 point P inside the qlhv ;vg 5s-8da il9j 4resq2+solenoid shown is a5;-eslhlvjg v+d8is9q r 2q4
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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