Question

Distinguish between the types of magnetic materials

Answer 1

Difference between Permanent Magnet and Electromagnet

Permanent (Bar) MagnetElectromagnetThey are permanently magnetized.These are temporarily magnetized.These are usually made of hard materials.They are usually made of soft materials.The strength of the magnetic field line is constant i.e. it cannot be varied.The strength of the magnetic field lines can be varied according to our need. The poles of a Permanent magnet cannot be changed.The poles of an electromagnet can be altered. Example of a permanent magnet is a Bar MagnetExample of a temporary magnet is solenoid wounded across a nail and connected to a battery.