Question

The magnetism of a magnet can be lost if

• A. it is kept inside a plastic box
• B. it is wrapped with a plastic cover
• C. it is hit with a hammer
• D. it stucks to a metal door

Answer 1

The correct option is C

it is hit with a hammer

• Demagnetization: Demagnetization is a process by which a magnet loses its magnetic property.
• Hitting a magnet with hammer will make its magnetic poles point in different directions thus causing demagnetization.
  

Option (c) is the correct answer.