Wiring and componentsQuestion 396 of 1506

What does the output of a potentiometer's movable arm do as it moves along the winding?

It stays at half of the source voltage
It varies from zero to double the source
It stays constant at the source voltage
It varies from full source voltage to zero

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Correct answer: It varies from full source voltage to zero

Both ends of the winding are connected, so the arm picks off a portion of the voltage.

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

Questions last reviewed: 18 October 2026

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