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Magnetism

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8 Jun 2009 07:20:57 IST

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Magnetism

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Q. A current i ampere flows along an infinitely straight thin walled tube, then the magnetic induction at any point inside the tube is :-

a) infinite b) zero c) () 2i/r tesla d) 2i/r tesla

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Bhaskar Tetarbe

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8 Jun 2009 09:46:22 IST

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Cmon reply someone atleast.

Bhaskar Tetarbe

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8 Jun 2009 10:18:57 IST

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noone???

Akshay

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9 Jun 2009 11:15:13 IST

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zero? By Ampere's Law.

Abhimanyu

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9 Jun 2009 11:19:16 IST

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u say the wire is thin, so u can say the radius of the wire is apprx zero.....so the magnetic induction will be zero at any point

Akshay

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9 Jun 2009 11:22:00 IST

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why would the radius be zero?? It is a hollow tube.

But the induction everywhere inside is zero because the current enclosed is zero since the current flow is along the walls of the tube.

Abhimanyu

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9 Jun 2009 11:24:54 IST

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he nvr mentioned it to b a hollow tube dude.....but he saud it was thin so it means radius is almost zero

Bhaskar Tetarbe

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9 Jun 2009 12:21:38 IST

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Well even I think its zero. Just wanted to confirm it. using Ampere's circuital rule or cosidering radius to be zero, either ways I think it shud be zero/

paul

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13 Jun 2009 19:03:34 IST

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Mr. Abhimanyu,

don't you know what a thin walled tube is? it is a hollow tube with zero thickness, but non zero radii.Ya from Ampre's law, the current will be along its length through the walls,so I inside an Ampreian loop take inside the tube will be zero.so Magnetic induction will be zero.

paul

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13 Jun 2009 19:04:16 IST

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Mr. Abhimanyu,

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