An equilateral triangle of side length l is formed from a piece of wire of uniform resistance. The current I is fed as shown in the figure. Then, the magnitude of the magnetic field at its center O is
A
B
C
D
zero
Text Solution
Verified by ExpertsThe correct answer is:
D
Distribution of current will be as shown below.
Net magnitude of magnetic field at the center O is given by
[ 
AO=BO=CO=r]
= 
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