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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 is placed be.abkh77 ce w8( i3fklflow a compass. When the conventiona8ckah bl.3(7 w7k fefil current in the conductor 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 to be cut in half along the dott/0 uhnt7sjwpf,lm qrfel,(n+ 6fu-)ded lines shown. None of the pieces are rotated. After the fnn,ft)+l-dp/js m,qwu f7hrul6(0e 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 depicts iron filings sprinkled around threui4wanb6 7v( 1 +bdzopl.gu6ve permanent magnets. Pole R is the same as poles 1 ov6d6 gbivu.p+4u (nazwbl7


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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;fr7 ux hqii;n0; 9n 0x6lfpkm from left to right in a wire as shown in the diagram, what is the direction of the magnetic field at point i0f;r x; hi7unqf0 p9xnml6k;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 throughq hesl cd32dkko9ip v8b :x 5a+oz71b0 a horizontal wire from left to right as shown in the accompanying diagram. Which option best reba89do0q37vx1zek2 b+ p 5 cd:klis hopresents 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 reprox/1o6eh5ywv esentation of magnetic field lines is inconsistent? The squao yh6vxw1e /5ores in 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 conventio;zc p)g, +g3b*jr khbnnal current directed into the plane of the page as shown in the figure. Which one of the arrows shown best indicates the direction of the magnetic field asr,)g bzg jc *+n;hkb3psociated 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 ugz p,ee9(21 +bdn9kjawby2eue 1y g3 space so that the conventional 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 there a place on the x-axis (aside from infinity) at which the magnetic field is equal to zero from these currynage(b9 b+ d1e2 uzkeguw 12jy 3p9,eents?



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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 wqd o (5ikdc1 j4n)f7kshown end on in the figure below. The cdkjwi1 n57kd 4fo)q(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 coyvz5 f2fkxg)9 nventional electrical current is then run through the coil from left to right as shown. This will cause thkzfxf29)5g yve 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 thr, 0s(l z4ksmfw:o 9udnenn++ mough point P inside the solenoid shownzn se(mflo,u +4dsn9 wmk0+n: 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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  • 姓名:游客(未登录)
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    总分:12分 及格:7.2分 时间:不限时
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