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Electricity and Magnetism
Electric
Circuits
When drawing diagrams to
represent electric circuits, the following symbols are used.
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Wires
crossing but not connected |
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OR |
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Wires crossing
and connected |
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OR |
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Unless otherwise stated, we assume that
connecting wires are made of a perfect conductor.
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Switch
........ |
Battery
(or other D.C. supply) |
A.C. supply
........ |
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Resistor
......
...... |
Variable resistor
......
....... |
Variable resistor
(used as a potential divider) |
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Filament lamp |
Voltmeter |
Ammeter |
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Transformer |
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