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 3 :1(rernm5d3iqa8 efj jfk u4conventional current in the conductor is from sou5urm3fe qendjif8 j13 4a rk:(th 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 t q,8 :/9kxoaw(hp *8zohncbnbhe dotted lines shown. None of oc/zkb8b : ph8 9nxqwaoh,n*(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 sprinkled arou )d-kgu-cm)z8nqh bh;nd three permanent magnek8uhm;gnd qz-)-)hcb ts. 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 (posw qwx/3za* mk9y4az* ditive) electric current flows from left to right in a wire as shown in the diagram, wh4a xm w9 zd/wzaqk**3yat 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 through a horizontal wire fromjtqm 47/ uq0n5ypcmtlm* zk ./ left to right as shown in the accompanying diagram. Which option best represents the direction of qn 4 kz0qm/.mtu7m/l*pj5t yc 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 undeeko6 fe f8 dfmu-in 67s0ro0u8rstanding of physics, which representation of magnetic fo f0e7ur ffkd06 u8imo se-6n8ield 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 straig :z:sj74jg bxoht wire has a conventional current directed into the plane of the page as shown in the figure. Which one of the arrows shown best indicates the direction of the magneti: b gjoxj7sz:4c 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 ceo u 1vq/8.n0(piuyyoonventional 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) at which the magnetic field is equal to zn uveq 81(iy0yup/oo.ero 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 in the figure below9 f1u)k44ghq+ opukl c.gp q1u4 lk)okfh 9c+u4 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..+s5/7r vvb tx+swell A conventional electrical current is then run through the coil from left to righ rbxl75v+/sw.es vt+ lt 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 thfjfki6w :q. cm:*dqy6 mxeq*n1d 7yq 4e solenoid shown 1kf:qqe yw i x c.mqq 6my*74*:jfd6ndis
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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