Permanent magnets are the substances having the property of

Options

A. ferromagnetism at room temperature for long period of time.
B. paramagnetism at room temperature for a long period of time.
C. anti ferromagnetism at room temperature for a long period of time.
D. diamagnetism at room temperature for a long period of time.

Answer

A

Explanation

Permananet magnets are those substance that retian their ferromagnetic property for a long period of time at room temperature.