Published by:
CGP EDU Academic Team
Published on: September 12, 2026
A long cylindrical conductor of radius 
carries a current 
flowing parallel to its axis. The current density is uniform over the cross-section of the conductor. The magnetic field at a point at a distance 
from the axis of the conductor is 
, where 
is
Text Solution
Verified by ExpertsThe correct answer is:
8
(8) Current density in the wire is 
Taking a circular loop of radius 
on a crosssection of the conductor, with the centre the axis of the conductor, and applying Ampere's Law,
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