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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 centre to surface

B

magnetic field decays inversely with distance `r` from the centre of wire for `r gt R`

C

magnetic field at the centre of wire is zero

D

None of the above

Text Solution

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Use Amperes Law
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