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A uniform current I is flowing in a long...

A uniform current `I` is flowing in a long wire of radius `R`. If the current is uniformly distributed across the cross-sectional area of the wire, then

A

magnetic field increases linearly from center to surface

B

magnetic field falls of inversaly with distance r from center of wire for `rgtR`.

C

magnetic field at centre of wire is zero

D

magnetic field at centre of wire is non - zero

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The correct Answer is:
A, B, C
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