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14. Semicondutor electronics — Physics STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 SciencePhysics14. Semicondutor electronics1 Mark
MCQ
Avalanche breakdown is due to
  • ✓
    Collision of minority charge carrier
  • B
    Increase in depletion layer thickness
  • C
    Decrease in depletion layer thickness
  • D
    None of these
✓

Answer

Correct option: A.
Collision of minority charge carrier
a
(a)At high reverse voltage, the minority charge carriers, acquires very high velocities. These by collision break down the covalent bonds, generating more carriers. This mechanism is called Avalanche breakdown.

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