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Q. Explain the magnetize of metal?
Answer:-
You can rub a magnet alongside the metal in one direction for a bunch of times (the more the better) and that will magnetize it to some degree, but it's not permanent and will demagnetize if it is hit hard with something.
As well to magnetize something like a nail if you point one end north and hit the other end with a hammer it must weakly magnetize it. Regrettably it does not work every time.
Voltages relative to earth It is very common in electrical circuits to have an earth connection. This earth connection has no effect on potential differences across components
why an electron can''t exist in the nucleus .
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