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Institute of Physics (IOP)
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Episode 100: Preparation for Electric Current Topic *suitable for home teaching*
From the Institute of Physics, this topic looks at basic electrical ideas, particularly current, potential difference and energy. The topic is split into teaching episodes. These are self-contained activities of varying time periods. The topics in this section include:
Episode 101: Introduction to circuits
Episode 102: Current as a flow of charge
Episode 103: Currents and charge carriers
Episode 104: Drift velocity
Episode 105: Sources of electrical energy
Episode 106: Electrical power
The aims of this section are to enable students to:
1. describe current as a rate of flow of electric charge
2. give examples of charge carriers in different conductors
3. use flow analogies for current, e.g. water circuit, traffic moving on along a road
4. relate current to microscopic charge flow: I = nAqv
5. use ammeters correctly
6. describe sources of electrical energy (cells, batteries) as electrical ‘pumps’
7. use energy analogies, e.g. relating potential difference to changes in height and gravitational potential energy
8. give examples of energy transfers (heating effect - filament lamp and kettle)
9. use voltmeters correctly
10. calculate work, energy and power in electric circuits P = IV.
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