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The typical operating current for a lightemitting diode is approximately:

1. 1 to \( 5 m A \)
2. 5 to \( 20 m A \)
3. 20 to \( 500 m A \)
4. 500 to \( 2000 m A \)

Correct answer: 5 to \( 20 m A \)

Solution

A standard light-emitting diode is normally operated at a modest current so it emits light without being damaged. The common range is about 5 to 20 mA, which matches typical indicator LED specifications.

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