Which method does not demagnetise a bar magnet? A Heat the bar magnet and place it in the east-west direction to cool. B Place the bar magnet in the east-west direction and hammer it. C Place the bar magnet in a coil connected to an a. c. supply and slowly withdraw it. o Place the bar magnet in a coil connected to a dc. supply and slowly withdraw it.
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Which method does not demagnetise a bar magnet? A Heat the bar magnet and place it in the east-west...
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