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A bar magnet having coercivity 4 xx 10^(...

A bar magnet having coercivity `4 xx 10^(3) Am^(-1)` is demagnetised by inserting it inside a solenoid 10 cm long and having 50 turns. The current that should be sent through the solenoid is

A

1A

B

4A

C

8A

D

16A

Text Solution

Verified by Experts

The correct Answer is:
C
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