Published by:
CGP EDU Academic Team
Published on: September 13, 2026
A long straight metal rod has a very long hole of radius ' a ' drilled parallel to the rod axis as shown in the figure. If the rod carries a current ' i ' find the value of magnetic induction on the axis of the hole, where 
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
B
In the rod current density 
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