You are given an iron strip. How will you make it into a magnet?

Solution:

Take a bar magnet and keep in contact with one of its poles with one edge of the bar of iron.

• Without lifting the bar magnet, move it along the length of the iron bar till you reach the other end.
• Lift the magnet and bring the pole (the same pole you started with) to the same point of the iron bar from which we began.
• Move the magnet again along the iron bar in the same direction as you did before.
• Repeat this process for about 30-40 times.