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 convet, eu2od 7(uckntional current in the condu c, kt27du(ueoctor is from south 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 ty4g rrr6p.ni04d dpro- (e l2n+rm0 kfoaww7 5o be cut in half along the dotted lines shown. None of the pieces are rotated. After d4n7+4fg 0k5.o( rrr a2dol irrp0e-6wwn mp ythe 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 around qkf n-n6;w:j1gv:fef three permanent magnets. Pole R is the sa1 qen;nkf:f6-f vw:jgme 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 right in act l738/hct xu wire as shown in the diagram, what is 38utc7x /tchlthe 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 curreh,p+0.gv7un m cd1lobnt flows through a horizontal wire from left to right as shown in the accompanying diagram. Which option best represents the direc.op1 l,0umc hv+gbdn 7tion 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 ma v6gm ./ktc/ docj50bfp/k n)qgneti) /pk/j/m k6doq nvbgctf05.c c field 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 straigh4i kqj 8y1xa(nh;l xg8t wire has a conventional current directed into the plane of the pa al;jg x1n8(i8xqhky 4ge as shown in the figure. Which 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 conventia a;w,ivxpd sc/m*; 1jonal current in the left wire (2 A) comes out of the plane of the page and the conventional current in thea 1wd*p; i,/jsc;mv xa 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 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-carrying wires are shown end on in the fka9uvwvjkjlv35onxs;8j7bp/ b-;o )a in3/yigure belowopoa 8-3 vvl5ku/ jv)wnnkj; 9;aib3yj/ sbx7. 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.yr*r gpe9)d1x A conventional electrical current is then run through the coil from left to right as shown. This will p9 yrg)*de 1rxcause 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 *g; df *ts5umhqit my6/9by e2)2wzkisolenoid shown is 6q f2/9*y)th dk 5gz *;mbmtywuiie2s
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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