a
placing the magnetic bar in a solenoid
b
double-stroking the magnet with soft in n-s direction
c
heating a magnetic bar red hot and allowed to cool e-w direction
d
hammering the magnetic bar repeatedly in n-s direction
Explanation
Correct Option
cVideo Explanation
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Discussions (24)
Tsquare2
3 months ago
but I thought solenoid method is the most effective way of demagnetizing a magnet
King33Victor
3 months ago
wrong question and answer
u can still demagnetized by heating and by hammering
Uriel21189512
3 months ago
@Eze, you're obviously wrong 👀
Demagnetizing magnets by hammering is done only when they are in East-West direction. Not North-South direction ( as the option implies).
So, both question and answer are correct🤧😏
