Question

a magnet attracts nickel but not copper give reason
​

Answer 1

Answer:

Magnets are made of ferromagnetic material like iron, nickel, cobalt etc. ... The falling magnet induces a current in the copper pipe and, by Lenz's Law, the current creates a magnetic field that opposes the changing field of the falling magnet. Thus, the magnet is "repelled" and falls more slowly.

Answer 2

$\huge\underline\mathbb\red{Answer}$

Because magnet can inky attracts ferrius metals, but copper doesn't contain any iron so it can't be attracted by magnet.