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 convah8n: h3xd)fe:urg(jentional current in the conductor is from south to nxnjh) g f:h:d3a8u(re orth 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 tomhrurj)7c hz9myl9 0t3r 7k,d9ruzk2 be cut in half along the dotted lines shown. None of the pieces are ku39rrhzu d7y c 07rz)l9k9jrm2h,mtrotated. 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 sprinklee0h d rw*(rc .zk1fh/1l6ixjt 6s;0gl1uf bpbd around three permanent magnets. Pole R is the sa*hp ubsr6bw;0x( thzd 1cf lkfjergi0.61l/ 1me 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 to rigml6(4fhf/r;5 lz ubvu 5 l1mvpht in a wire as shown in the diagram, what is the direction of the magnetic field at po p/m f(urb4vzl5lhf;vm u156lint 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 wzmft 5inn68i9lw.7yiire from left to right as shown in the accompanying diagram. Which option bez8. nlii5 9m7fint6 wyst 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 under/);fxw7og/ce xivn q 2standing of physics, which representation of magnetic field lines is inconsistent? The squares in the diagrams below simpl gn)7ovew/f;x / qix2cy 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 into the plane o,qo:j8n rts/ sf the page as shown in the figure. Which one of the arrows sho, r8/sqtonsj: wn 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 cmgxbf8 m7*lc0onventional 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 infinity) axc7 *8gmmb0l ft 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 cursu(nbw.5,8a df6 i iyzrent-carrying wires are shown end on in the figure below.8sz.anyuif5 id,b 6(w 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 conventional electrical curre w(wn -.g1hprrnt is then run through the coil from r1.ph( rwnw-g 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 thzglppyp-jj* do mo7 6 f0;m9)irough point P inside the solenoid shown is j)ipo7 g0pj9p*zymdo -ml f 6;
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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