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What is an electric current?
An electric current is a flow of electrons.
What is required for an electric current to flow?
For an electric current to flow, you require a: power source, conductor, appliance and occasionally a switch.
What does a power source do?
A power source supplies the power.
What does a conductor do?
A conductor carries the power. E.g. wires.
What does an appliance do?
An appliance converts the electricity to a useful form. E.g. a lightbulb.
What does a switch do?
A switch controls the supply of power.
What measures current?
An ammeter (A) measures current. This ammeter is wired into a circuit.
How does an ammeter measure the current?
The ammeter measures the current by counting the number of electrons that go pass it per second.
Basics of Electricity Unit