Meters and troubleshootingQuestion 739 of 1506

What does a current source do when the load resistance changes?

It reverses the current direction
It shuts off when the load resistance goes up
It changes its output voltage to keep the current constant
It keeps the voltage constant and changes the current

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Correct answer: It changes its output voltage to keep the current constant

To hold its current fixed, it raises or lowers its own output voltage as the load needs.

Source: Lessons in Electric Circuits I: DC (Kuphaldt), 9.3: Current Signal Systems

Questions last reviewed: 18 October 2026

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