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Glossary Science & Engineering

Resistor

A resistor is a component that limits current in a circuit, with a value in ohms often shown by coloured bands.

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In more detail

Resistors in series add: 100 + 220 + 330 = 650 Ω. In parallel the reciprocals add, so two 100 Ω resistors give 50 Ω. Standard values follow the E12 and E24 series.

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See also

  • Glossary Ohm's law
    Ohm's law states that the current through a conductor equals the voltage across it divided by its resistance: `V = I × R`.
  • Glossary Voltage divider
    A voltage divider is two resistors in series that produce a lower output voltage: `Vout = Vin × R2 / (R1 + R2)`.
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