Wiring and componentsQuestion 395 of 1506

A variable resistor is used to control voltage. What is it called?

  1. Rheostat
  2. Stepped resistor
  3. Fixed resistor
  4. Potentiometer
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Correct answer: Potentiometer

A rheostat controls current; a potentiometer controls voltage.

Source: Electrical Fundamentals Competency (Industry Training Authority of BC), 5.5: Circuit Control Devices

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Questions last reviewed: 18 October 2026