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Magnetic field at the centre of regular ...

Magnetic field at the centre of regular hexagon current carrying loop of side length l and current i is

A

A. `(sqrt(3)mu_0 i)/(πl)`

B

B. `(6mu_0 i)/(pil)`

C

C. `(2mu_0 i)/(pil)`

D

D. `(3mu_0 i)/(pil)`

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