Question

How can you magnetise an iron needle using a strong bar magnet

Answer 1

you can magnetise an iron needle by using a strong bar magnet by one touch method .
all you have got to do is trace a semicircle over the needle with the help of magnet without touching the needle

Answer 2

we can do this by rubbing the iron needle in a continuous patter or we can keep the iron needle in a close contact we the magnet and pass current through magnet then it might get magnetised