Question

Find odd one out. Give reason for your choice.

• A. bar magnet
• B. horse-shoe magnet
• C. electromagnet
• D. lodestone magnet

Answer 1

The correct option is C

electromagnet

Explanation of correct option:

(c) Electromagnet:

1. The magnetic substances in which magnetic property is induced by flowing electric current are known as electromagnets.
2. Magnetic property of these substances is lost as soon as the electric current is switched off.
3. These are temporary magnets.

Explanation of incorrect option:

1. Bar magnets, horseshoe magnets and lodestone magnets are made by naturally occurring materials.
2. These magnets have a weaker magnetic field as compared to the electromagnet.

So, the odd one is (c).