Electrical safety
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Last updated 7:52 PM on 3/5/25
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14 Terms
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Circuit Symbols
Symbols that represent circuit components in circuit diagrams.
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Resistor
A component that controls current in a circuit.
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Thermistor
A temperature-dependent resistor whose resistance changes with temperature.
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Light-Dependent Resistor (LDR)
A resistor whose resistance decreases as light intensity increases.
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Ammeter
A device that measures current and is connected in series.
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Voltmeter
A device that measures potential difference and is connected in parallel.
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Diode
A component that allows current to flow in one direction only.
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Relay
A switch that uses a small current to control a larger current in another circuit.
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Transformer
A device that 'steps up' or 'steps down' current and potential difference.
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Fuse
A protective device that prevents current surges from damaging components.
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Motor
A functional component that rotates when current passes through.
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Heater
A functional component that transfers thermal energy.
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Lamp
A device that emits light when current flows through.
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Electromagnetic Components
Components such as magnetising coils that utilize electromagnetic effects.
Note 
Flashcards (29)