Question

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

Answer 1

u can separate nickel coins from copper coins using a powerful bar magnet as the powerful which is

Answer 2

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.