As shown in the figure, a current of 2A flowing in an equilateral triangle of side 
cm. The magnetic field at the centroid O of the triangle is:
(Neglect the effect of earth's magnetic field.)
A
4 
x l0 -4 T
x l0 -4 T
B
4 
x 10 -5 T
x 10 -5 T
C
x 10 -4 T
D
3 
x1 0 -5 T
x1 0 -5 T
Text Solution
Verified by ExpertsThe correct answer is:
D
d tan60° = 2 
d = 2 cm
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