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 corecivity of the bar magnet is :
- A285 A/m
- B2600 A/m
- C520 A/m
- D1200 A/m
✓ Correct answer: B
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