Permanent magnets are the substances having the property of
A. ferromagnetism at room temperature for a 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
Permanent magnets are the substances having the property of
A. ferromagnetism at room temperature for a 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.