A bar magnet is demagnetized by inserting it inside a solenoid of length 0.2 m, 100 turns

PHYSICS · Single correct · CBSE · Physics · Magnetism and Matter · Magnetism and Matter

Problem

A bar magnet is demagnetized by inserting it inside a solenoid of length 0.2 m, 100 turns, and carrying a current of 5.2 A. The coercivity of the bar magnet is: (1) 285 A/m (2) 2600 A/m (3) 520 A/m (4) 1200 A/m

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