Question:
The current density Jinside a long solid cylindrical wire of
Last updated: 6/7/2023
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The current density Jinside a long solid cylindrical wire of radius a 5 30 mm varies with radial distance r from centre the according to J Jor2 a where Jo 220A m Find the magnitude of the magnetic field at a r a 2 b r 2a Hint In a culinder dA 2rrdr