Differentiate, distinguish, compare and explain what is the main difference between electromagnet and permanent magnet.
Comparison, Distinguish, and Difference between Electromagnet and 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. Electromagnet can produce very strong magnetic force. Permanent Magnet produces comparatively much weaker magnetic force.
3. Electromagnet strength can be changed. Permanent Magnet strength cannot be changed.
4. Electromagnet polarity can be changed. Permanent Magnet polarity cannot be changed.