Marine Electrical Systems USCG Question #1330 (Set 45)

What would be the indication of a burned-out LED?

Official USCG Answer & Rule Citation

Correct Answer: Option B — no illumination

Light Emitting Diodes (LEDs) are semiconductor devices that emit light when forward-biased. A burned-out LED indicates an open circuit within the semiconductor junction or a failed bond wire. Consequently, no current flows through the device, resulting in a complete loss of illumination in the indicator circuit.

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