Coercivity of a magnet where the ferromagnet gets completely demagnetized is 3 × 103 Am-1. The minimum current required to be passed in a solenoid having 1000 turns per metre, so that the magnet gets completely demagnetized when placed inside the solenoid is
1
30 mA
2
60 mA
3
3 A
4
6 A
5
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