Difference between revisions of "3-ELE-09"
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==Main Body of Lesson== | ==Main Body of Lesson== | ||
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| + | Practical: | ||
| + | To investigate whether placing different materials inside a solenoid will increase the magnetic field strength of the solenoid or not. | ||
| + | Students to record observations noting the following: | ||
| + | * must keep the number of turns on the solenoid the same (fair test) | ||
| + | * each bar placed inside the solenoid must be the same size and shape (fair test) | ||
| + | * students can test strength of this 'electromagent' by using it to pick up paper clips or 10 grammes masses (depending on what number of turns are used. | ||
| + | |||
==Plenary== | ==Plenary== | ||
==Homework== | ==Homework== | ||
Revision as of 04:55, 13 April 2008
Contents
Outcomes
- Pupils can ...
- Pupils can ...
Specification References
6.3 recall the properties of magnetically hard and soft materials
6.5 understand that magnetism is induced in some materials when they are placed in a magnetic field.
6.8 recall that an electric current in a conductor produces a magentic field round it.
6.9 describe the construction of electromagnets
6.10 sketch and recognise magentic field patterns for a straight wire, a flat circular coil and a solenoid when each carrying a current
Starter
Recall from previous lesson 'what is a magentic field?' Demo on OHP using iron filings the shape of the magneic field around:
- a straight wire
- a flat coil
- a solenoid
Students to sketch shapes of magnetic fields for each.
Main Body of Lesson
Practical: To investigate whether placing different materials inside a solenoid will increase the magnetic field strength of the solenoid or not. Students to record observations noting the following:
- must keep the number of turns on the solenoid the same (fair test)
- each bar placed inside the solenoid must be the same size and shape (fair test)
- students can test strength of this 'electromagent' by using it to pick up paper clips or 10 grammes masses (depending on what number of turns are used.
