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:

Question

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:, 285 A / m, 2600 A / m, 520 A / m, 1200 A / m

MARKS App · Accepted Answer

Coercivity = n I = 100 0.2 × 5.2 A / m = 2600 A / m

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