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A conductor of length L and carrying cur...

A conductor of length L and carrying current i is bent to form a coil of two turns.Magnetic field at the centre of the coil will be

A

A. `mu_πi/L`

B

B. `mu_0pii/(2L)`

C

C. `2mu_0i/L`

D

D. `4mu_0pii/L`

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