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Sahay Sir > Question Answers > Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) > A bar magnet has coercivity 4 × 10^3 A/m. It is desired to demagnetise it by inserting it inside a solenoid 12cm long and having 60 turns. The current that should be sent through the solenoid is

A bar magnet has coercivity 4 × 10^3 A/m. It is desired to demagnetise it by inserting it inside a solenoid 12cm long and having 60 turns. The current that should be sent through the solenoid is

A bar magnet has coercivity 4 × 10^3 A/m. It is desired to demagnetise it by inserting it inside a solenoid 12cm long and having 60 turns. The current that should be sent through the solenoid is