A bar magnet is most effectively demagnetized by
...A bar magnet is most effectively demagnetized by
placing it in a N - 5 position and hitting it with a hammer
subjecting it to an electric current from a battery
bringing its north pole in contact with the north pole of a very strong magnet
heating the magnet
Correct answer is A
No explanation has been provided for this answer.
Let Δx be the uncertainty in the measurements of position and Δp the uncertainty i...
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