magnet and magnetic field lines - 无忧得胜-网上国际课程 (5edu.win)

1#

96.27: A long straight wire conductor is placed below a compapwt2 nodd)54gos 4*bfss. When the conventional current in the conductor is from south to north and large, the N pole of the compassf5 topbwd4g) sd2o*4 n:

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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 lines5dafbi81pn6 qjz f7 fgn06gn9 shown. None of the pieces are rotated. Afte0fjnpbng6q fa6957 giz f81ndr 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 fi 6a;1peki7lanor i 3v6lings sprinkled around three permanent 37lv66 kii p;naaer1omagnets. 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 (paplrm2t)k49uv3 ; js x -qvxqnvn,x62ositive) electric current flows from left to right in a wire as shown in the diavxunl j49n2v- m;2,)qv3xa6kq ts rxpgram, what 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 horizontas (ayz 3rf:lo:l wire from left to right as shown in the accompanying diagram. Which option best represents the direction of the magnetic field at poi o3 :fsyla:rz(nt 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, which representation of magnzz5 6/yarl9d yl 38rdgetic field lines is inconsistent? The squares in the diagrams below simply represent/3l6rld z8 zar9ygy5d 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 k r6l1k2rg1mcnuh57 thas a conventional current directed into the plane of the page as shown in the figure. 2tc7kh ul1g 5mr6r1knWhich 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 so that the cgy yc3(ou+hw. onventional 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 fiochy g3u(y.w+eld 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-carryitdksa /2j0fliwoy( 8 o3f2x,c; psvh3ng wires are shown end on in the figure below. The wire io/,; kjfyowl(0vx82a stcps2 3fd h3on
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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本习题练习题目来源于无忧得胜-网上国际课程 (https://5edu.win)，学生可刷题练习，扫右侧二维码或加微信skysky1258，获取更多资料
教师可以抽题组卷或一键复制本试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力

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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 place a7stt )e;6nird near a coil of wire. A conventional electrical current is then run through the coil from left to right as shown. This will c; )rnas tti67eause 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 solenoxz2 m5w fqr/-uid shown is m 5q/ xfw2zu-r
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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