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A long cylindrical conductor of radius a...

A long cylindrical conductor of radius a contains a long cylindrical holr of radius l. The axes of the two cylinders are parallel and are at a distance d apart. A current I is uniformly distributed over the cross-section. Find the magnetic field at the centre of the hole.
[Hint: Apply the principle of superposition of magnetic field]

Text Solution

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The correct Answer is:
`(mu_(0)id)/(2pi(a^(2)-b^(2))`
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