Multiple choice

Magnets do not lose their properties significantly when

  1. left in open

  2. the magnet is hammered several times

  3. dropped from a height

  4. an alternating current is passed around the magnet

  5. the magnet is heated to a very high temperature

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

There is no effect on the magnet, when left in open.