Differentiate, distinguish, compare and explain what is the main difference between electromagnet and permanent magnet. Comparison and Differences.

Difference between Electromagnet and Permanent Magnet

S.No. Electromagnet Permanent Magnet
1 Electromagnet is temporary as it exhibits magnetic force only when current flows through it. Permanent Magnet as the name say is a permanent magnet.
2 Produces very strong magnetic force. Produces comparatively much weaker magnetic force.
3 Strength can be changed. Strength cannot be changed.
4 Polarity can be changed. Polarity cannot be changed.
5 Electromagnets are very strong as compared to permanent magnets. Magnetism property gets weaker over time or if gets dropped.
6 Electromagnets need electrical energy. Permanent magnets need no outside energy.
7 Discovered in 1820. Discovered long 2000 years ago.
About Author: Jeniffer Fleming