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f-alpha.net » Physics » Physics Lab » Components » Power Resistor

Power Resistor

When a current flows through a resistor, electrical energy is converted into heat. The higher the current, the more the resistor heats up. A power resistor is characterized by the fact that he is able to dissipate this heat without damage...

Therefore, each resistor has, in addition to its resistance value, a power rating, expressed in Watts. The power rating represents the maximum electric energy, at which the resistor can be operated safely...

  • Power resistors usually have a power rating of 5 Watt or above.
  • Carbon film resistors are available up to a power rating of 5 Watt.
  • For a higher power rating (> 5 Watt) a alloy wire wound on a heat conductor is used.

In the experiments you use the following power resistors...

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