Question

How will we separate other coins using powerful bar magnets

Answer 1

Is this your full question

A box contains coins made of nickel and copper. How will you separate the coins using a powerful bar magnet?

Then here is your answer

If you take a magnet near the coins all the nickel coins will get attracted to the magnet & copper coin will remain in the box because of the special ferromagnetic property of nickel, that is nickel can be magnetise & can itself become magnetic but copper don’t have have such properties.

Hope this helps:)

Answer 2

it is very important and simple thing I will explain In example take some sand and coins you keep some coins inside the sand now you keep that powerful bar magnet the coins will attract to the magnet