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习题练习：magnet and magnetic field lines
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 作者: admin  发布日期: 2024-08-02 21:11    总分: 12分  得分: _____________

答题人: 游客未登录  开始时间: 24年07月29日 14:24  切换到: 整卷模式

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1#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  96.27: A long straigh (9obd;:x0 n9btixg vat wire conductor is placed below a compass. When the conventional current in the conductor is from south to north and large, the N pole of the 9 a9bv0d( oxni:tbxg ;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 alongr (l p.*sd/)p le9s 5jkvf9bpw the dotted lines shown. None of the pieces are rotated. A*5espf rw 9sp9ld/jkp.b( v) lfter the cut:


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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 dep s*0z.ptnd.uz6 llt dly0+3q5n:f cdlicts iron filings sprinkled around three permanent magnets. Pole R is thqs*l.50:pdnfd cyzzt+ud.t l nl03 6le 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 v z9h6km9eyk8(positive) electric current flows from left to right in a wire as showyv9h9zk6 ekm8n in the diagram, 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 horizontal wir,ii v7/ w3m*im5puhtke from left to right as shown in the accompanying diagram. Which option best represents the direction of the magnetic 37*hmii u5vimtwpk,/ 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 understandinglxo3a;gvl60d3;s2 uwj x -eqo of physics, which representation of magnetic field lines is inconsistent? The squares in the diagrams below simply represent regions of sx23o;eqds0l;x-3o g l6 uavwjpace.



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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 cone11j yhu/:n7o.f rmb3gh 0de zventional current directed into the plane of the page as shown in the .fbj3 mu71ezyn1/ r h:oed0hgfigure. 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 conveq.m-pt )o9fguntional current in the left wire (2 A) c- 9mguqto p).fomes 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 zero from these currents?



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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 fntd; 4x sy6/ p2/kfokgigure below. Th6pgyfto/dsn ;/k4 2kxe 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 currenue ,/ vy7ht2lbt is then run through the coil from left to right as shown. This will cause the Norhly/2ue vt, 7bth pole of the compass to:



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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 sii9;s6l3an ts/n2ot hsf r-i(olenoid shown f tsaii-so3ls nn(2h96irt ;/is
directed



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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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