Mention five differences between an electromagnet and permanent magnet. [5 MARKS]
Each point: 1 Mark ElectromagnetPermanent magnet1. It is a temporary magnet and can be demagnetized1. It is a permanent magnet and cannot be demagnetized easily2. Magnetic strength can be changed2. Its strength is fixed3. Its polarity can also be changed3. Its polarity is fixed4. It is prepared from soft iron4. It is prepared from hard steel5. Direction of magnetic field can be reversed5. Direction of magnetic field cannot be reversed6. Magnetic field is produced when electric current flows.6. Electric current is not required to produce magnetic field.
Difference between permanent magnet and electromagnet