Difference between revisions of "4-ELM-01"
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==Plenary== | ==Plenary== | ||
| − | * Equipment: electric bell demo, different relay demos. | + | * Equipment: electric bell demo, different relay demos, circuit breakers. |
* Use the 'Electric Bell' and 'Relays' worksheet. Pupils should stick them in their books and use them to fully explain how they work. | * Use the 'Electric Bell' and 'Relays' worksheet. Pupils should stick them in their books and use them to fully explain how they work. | ||
Revision as of 10:44, 26 February 2010
Contents
Outcomes
- pupils know what a electromagnet is and how you can build one
- students can state four ways of increasing the power of an electromagnet
- students explain how the electric bell and different relays work
Specification References
- 6.9 describe construction of electromagnets
- 6.10
Starter
- Show to the pupils a wire wrapped around along nail, connected to a power supply. Ask them what will happen when the power supply will be switched on. Ask them to name the ‘device’. Discuss where and how this ‘device’ could be used.
Main Body of Lesson
- a magnetic field will be present around the wire when current is sent through it.
- The electromagnet is ON.
- Any piece of metal brought close to this field will be attracted by it.
- Show pupils and discuss how the electric bell and the relay works.
Plenary
- Equipment: electric bell demo, different relay demos, circuit breakers.
- Use the 'Electric Bell' and 'Relays' worksheet. Pupils should stick them in their books and use them to fully explain how they work.
Homework
Additional Information
Resources Required
Textbook References
- None
Website References
- None
Skills Addressed
Safety/Hazards
- None
Notes
- None
