Question

A circular coil of wire consisting of 120 turns, each of radius 12 cm carries a current of 0.30
A. What is the magnitude of the magnetic field B at the centre of the coil? (π = 3.14 )

A 18.84 × 10^−5 T
B 20.84 × 10^−5 T
C 18 × 10^−5 T
D 10.84 × 10^−5 T
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