Electromagnetism
Electrical Technology · Grade 10 · about 40 minutes
The principle that a current produces a magnetic field, the field around a wire and a coil, how an electromagnet and solenoid are made and strengthened, electromagnetic devices like the bell and relay, and why electromagnetism is so important.
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- 6 sections of explanation, worked examples and diagrams
- 1 practice task with hints and worked answers
- A quiz that marks itself as you go
- Your progress kept across every subject you take
Other lessons in this sub-strand
- Electromagnetism
- The principle of electromagnetism
- Field of a current-carrying wire
- The right-hand grip rule
- Field of a current-carrying coil
- The solenoid
- Factors affecting solenoid strength
- Constructing a solenoid
- Making an electromagnet
- The motor principle
- The electric bell
- The electromagnetic relay
- Magnetic pick-up and lifting magnets
- Troubleshooting electromagnetic circuits
- Electromagnetism in devices and machines