Difference between revisions of "4-ELM-01"
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==Main Body of Lesson== | ==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== | ==Plenary== | ||
Revision as of 10:37, 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
- Use this Adding Forces sheet. Student should add forces along a line and may go onto an extension activity where they both label and add up forces for a number of situations.
Homework
Additional Information
Resources Required
Textbook References
- None
Website References
- None
Skills Addressed
Safety/Hazards
- None
Notes
- None
