Physics Moving Charges and Magnetism Magnetic Field

A tightly wound 100 turns coil of radius 10 cm carries a current of 7 A. The magnitude of the magnetic field at the centre of the coil is (Take permeability of free space as 4π × 10^–7 SI units):

1

44 mT

2

4.4 T

3

4.4 mT

4

44 T

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