# An inductor of 310 turns has a radius of 3 cm and a length of 25 cm. The permeability of free space is 1.25664 × 10−6 N/A 2 . Find the energy stored in it when the current is 0.4 A. Answer in units of J.

An inductor of 310 turns has a radius of 3 cm and a length of 25 cm.

The permeability of free space is 1.25664 × 10−6 N/A 2 . Find the energy stored in it when the current is 0.4 A. Answer in units of J.

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