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A bar magnet is demagnetized by insertin...

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 :

Text Solution

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The correct Answer is:
2600
Coercivity is the value of H, when `B_(M)=0`
and `H=In=(IxxN)/l=(5.2xx100)/0.2=2600A//m`
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