A current of i ampere is flowing in an equilateral triangle of side a. The magnetic induction at the centroid will be –
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
D
θ = 60º
Perpendicular distance of C from any side
B = 3B 1
As B AB = B BC = B CA = B 1
= 
(sinθ 1 + sinθ 2 )
r = 
and θ 1 = 60º = θ 2
B C = 
B C = 
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