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Question

Lode stone is an example of:


A

natural magnet

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B

artificial magnet

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C

electromagnet

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D

none of these

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Solution

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.


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