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Circuit Symbols

There are many electrical components that can be placed in a circuit. These components can be represented by symbols.

Common components

Common components

  • Voltmeter: measures the potential difference (V).
  • Ammeter: measures the current (A).
  • Open switch: current cannot flow.
  • Closed switch: current is able to flow.
  • A cell: provides the potential difference. A cell is commonly called a battery.
  • A battery: more than one cell.
  • Lamp: if the circuit is complete, the lamp will light up.
  • Fuse: if the current is too high, the fuse will ‘blow’.
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