Question

Lode stone is an example of:

• A. natural magnet
• B. artificial magnet
• C. electromagnet
• D. none of these

Answer 1

The correct option is A

natural magnet

Explanation of correct option:

A: Natural magnet:

1. Magnet was discovered then a town of Magnesia in Asia Minor(Greece).
2. Magnet is formed by a blackish rock known as lodestone(magnetite) which is found naturally.

Explanation of incorrect option:

B: Artificial magnet

1. Ferric oxide, barium oxide, cobalt, nickel, etc are used to make an artificial magnet.

C: Electromagnet

1. We can define electromagnet as when an iron piece is kept in an electric field then that iron piece will start behaving like a magnet and will attract magnetic substances.
2. This is not a permanent effect as soon as the magnetic field is removed it will again behave as a normal iron piece.

Hence, the correct option is A.