Zusammenfassung der Ressource
Magnetism and Electromagnetism
- Magnets & Magnetic Materials
- Permanent Magnets
- Steel
- Hard Magnetic Materials
- Stay Magnitised
- Like Poles Repel
- Unlike Poles Attract
- Iron
- Soft
- Magnetised and Demagnitised
- Easily Changes
- Attract & pick up other Magnetic Substances
- Electromagnets
- Stronger Field
- Increasing Turns
- Increasing Current
- Wrap around Soft Iron Core
- Electric Bell
- Pulls arm to hit bell
- Relay Switch
- Safety
- Voltage too high