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

1#

96.27: A long straight wire conductoh3:,4 (dbled :zny bsir is placed below a compass. When the conventional current in the conductor is from south to north and large, the N pole of the co4l ,n(bedy:: h sdibz3mpass:

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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 lines shownhe52 -kk ds ai1ua j(y34yest5. None of thet ije3yk 55s-1 ku 4(yeaa2hsd 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 aroz3rr)x)yo+dzxy k 29 xund three permanen3 xrdr +x o)y)zz9xk2yt magnets. 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 flows from left to dp.*vr5 j75:apipqgu right in a wire as shown in the diagram, what is the direction o *ppd5jg7a :u.vip5qrf 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 tzm7)97 vflyon85ntcr id,tngho 033s hrough a horizontal wire from left to right as shown in the accompanying diagram. Which option best represents the dire,5zhty onr8odgf i7 vn 9730mls)nc3tction 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 physics, which representation of mrgl -faos;k o mg4,/)qagnetic field lines is inconsistent? The squares in the diagrams below simply represent regions of spacea4rkmfqgl-,);s /go o.

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 h*sa9 *3 ru;t/:zrkzcwy5lwmcvgcb sc* q(u2: as a conventional current directed into the plane of the page as shown in the figure. Which one of the aarl t z*:*smrvqzc9k* u;(2 :c/g cwuw bscy35rrows 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 convent -s9g7eqtcgh q.*8h aw)pyah;ional 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 c.ha7g te;qa*spghh8y) w-9q there a place on 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-cr;a 7*w,3 v8hh/ hke9tv ommsbarrying wires are shown end on in the figure below. The wire /3 htaw rhh k9*;,m so7v8vbemon
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 ywpe1l9,jk1 u u1;aq x;(vkc fa; .erbwire. A conventional electrical current is then run through the coil frcr1 (b ;,vjak;a;u fq yuw1x pkl9.1eeom 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 fi ngpute (6fr,9 za;bt;eld line passing through point P inside the solenoid shown is z9nga6 ;,rbutp te(;f
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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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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