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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 straight wire conductor isfwct2d.4p+zg ko pvy1 */axb2 placed below a compass. When the conventional current in the conductor is from sky*c4v. og+p/2dzf 1 2txabpwouth 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 to be cut in half along the dotted lines sf.3i:mrc0j q 5ns axzxq,46 vvhown. None of the p04q.ai q v5c6,zjrx x:f ms3nvieces are rotated. 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 the right depict9lz zvz41* pzxs iron filings sprinkled around three permanent magnets. Pole R is the9vzzp zz* xl41 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) ej;vd-qfj g fb3w+w :g7lectric current flows from left to right in a wir g7jqdf -wv3jw:bgf;+e as shown 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 wire from left to rigy9/ +mvik1 jntht as shown in the accompanying 1+ i9mkvnyt/j diagram. Which option best represents the direction 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 relz)l2jz, swf3 g hbe/7presentation of magnetic field lines is inconsistent? The squares l2wlze/f3j, ) hgb z7sin the diagrams below simply represent regions 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 conventional cu (er+6c 9o/0r cf*pk j-fnhamnrrent directed into the plane of the page as shown in the figure. Which one of the arrows shown best indicates the direction of the magnetij-ncr0f9 c ( +arkfnp/o e*6mhc 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 conventional current in theponjj b (-t1*d dds0jpy2*s h. /mc:ab left wire (2 A) comes out of the plane of the page and the conventiondpy.1s0*(mjo d bhsjdt 2/pjcb*-n:aal 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 are7b .swf)a 4xkg8/o3)pvrk2zra6vlcl shown end on in the figure below. The xr3la g2wakv/6fsv bc)r7 o4z)l.8pk 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 elecbft 7n6ktgf4j2u 80rxhk , :jxtrical current is then run through the coil from left to right as 2xt 8f k0:76 4jbtxjugfr,nhk 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 thtf: u-o rrgupa2o2x4mt)r6z- e solenoid shown rpo ou- au4rf -zxgm)226t:rtis
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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