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The B-H curve for a ferromagnet is shown...

The B-H curve for a ferromagnet is shown in the figure. The ferromagnet is placed inside a long solenoid with `1000` turns/cm. The current that should be passed in the solenoid to demagnetise the ferromagnet completely is :

A

`20 muA`

B

`40 muA`

C

`2 mA`

D

`1 mA`

Text Solution

Verified by Experts

The correct Answer is:
D
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