Permanent Magnet
Revision as of 09:44, 4 March 2019 by NRJC (talk | contribs) (Created page with "==Key Stage 3== ===Meaning=== A '''permanent magnet''' is an object with its own magnetic field that remains there even when there are no other external...")
Contents
Key Stage 3
Meaning
A permanent magnet is an object with its own magnetic field that remains there even when there are no other external magnetic fields.
About Permanent Magnets
- A bar magnet is a permanent magnet.
- Permanent magnets are used in a electrical motors.
Key Stage 4
Meaning
A permanent magnet is an object with its own magnetic field that remains there even when there are no other external magnetic fields.
About Permanent Magnets
- A bar magnet is a permanent magnet.
- Permanent magnets are used in a electrical motors.
- A permanent magnet can only lose its magnetic field under certain conditions:
- When it is struck with a sudden force.
- When it is heated.
- When an extremely strong external magnetic field is applied.