Correct Answer - Option 1 : Light weight permanent magnet
Hard ferrites have high coercivity, so are difficult to demagnetize. They are used to make light weight permanent magnets for applications such as refrigerator magnets, loudspeakers, and small electric motors.
Soft ferrites have low coercivity, so they easily change their magnetization and act as conductors of magnetic fields. They are used in the electronics industry to make efficient magnetic cores called ferrite cores for high-frequency inductors, transformers and antennas, and in various microwave components.
