A current of 
ampere flows in a circular are of wire which subtends an angle of 
radians at its centre, whose radius is R. The magnetic induction 
at the centre is:
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
D
For a loop, magnetic induction at center,
When loop subtends angle 
at centre, then
In the given problem, 
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