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  9. Q96

OPSC OCS 2022 · Question 96 of 98

The light emitting diode (LED) is made of

General Studies

  1. ASi
  2. BGe
  3. CGaNCorrect
  4. DTungsten

Answer: C. GaN

Explanation

Light Emitting Diodes (LEDs) are typically made of semiconductor materials. The most commonly used semiconductor materials for LEDs are gallium arsenide (GaAs), gallium phosphide (GaP), and gallium nitride (GaN), depending on the desired wavelength or color of light emission. Hence option c is correct. %20gallium%20indium%20phosphide.

Source: OPSC OCS (2022) Preliminary GS Paper-I; answers per Apti Plus Academy compilation (to be verified against official OPSC key)

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