A coil of 300 turns is wound on a non-magnetic core having

A coil of 300 turns is wound on a non-magnetic core having a mean circumference of 300 mm and a cross-sectional area of 300 mm². The inductance of the coil corresponding to a magnetizing current of 3A will be (Given that μ₀ = 4π × 10^{– 7} H/m)

Given : n = 300
l = 2πr = 300mm, A = 300mm² = 300 × 10^-6 m²

∴ Inductance of coil, L =	μ₀n²A
	L

=	4π × 10^-7 × 300 × 300 × 10^-6	= 113.04 μH
	300 × 10^-3