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Physics Medium PPSC Uploaded: 17 Aug 2026

A light-emitting diode (LED) converts electrical energy into:

  • A Chemical energy
  • B Sound energy
  • C Light energy
  • D Mechanical energy
Correct Answer: Option C — Light energy
Explanation:
A light-emitting diode, or LED, is a semiconductor device that emits light energy when an electric current passes through it in the forward ...
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