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习题练习:magnet and magnetic field lines

 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 straight wire conductor is placed below a compasc1 0aglx5tr4ps. When the conventional current in the conductor is from south to north and l5g1 a0crtxl4 parge, 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 the a vy0y82*ftj4rwebg8r w )m-ddotted lines shown. None of the pieces are rot*rd-m 4v0jr8yyft 2)wgweb8 aated. After 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 ;z/q;ry sk r7gru j:s/6ocmw5the right depicts iron filings sprinkled around three permanent s;g 6cm ku/wrro7/q;5r jyzs :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) elect)mp,7 jah8zpv.mqwp hofy8 +7ric current flows from left to right in a wire as shown in the diagram, what isap wp .+mh,mpy hqf8v)7oj7z8 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 ku*xo( cd0+gnwire from left to right as shown in the accompanying diagram. Which option best represents the direction of the magnkdx c n0+ug*o(etic 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 physic aetdx07q(s w qx5r7o4s, which representation of magnetic field lines is inconsistent? The squares in the diagrams below simply represent region adtr 7(xw50e47qsxqos of space.



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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 conventiol*ig nx ls*kcy:.+7k w m.5fcxnal current directed into the plane of the page as shown in the figure. Which one of the arrows shown best indicates the d7glmwc :s 5yk*nxf+ck* i.xl.irection 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 co*mr m226q2vc g t09us1pdawncnventional current in the left wire (2 A) comuqp6ac0v1 m 2w2ncd2g*9 tsrmes 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 si4n7g5fpv:icq( 8f.e nh-m ikul n;7 end on in the figure below. The wire on -ni pg:s4c8uh eqlk7v5ni(i7n;mf. f
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 cotugo* o 1t/ng-k-t5 3:ksiznail of wire. A conventional electrical current */g 5:a zu3gikt-tnn o1tko-sis then run through the coil from left to right as shown. This will cause the North 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 v-v. ;rlwx.+ olqbg)c the solenoid shown is .v w.bqgo lx )vc+r;-l
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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总分:12分 及格:7.2分 时间:不限时
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