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MHT CET 202623 AprilMorning Shift
Exam
MHT CET
Year
2026
Date
23 April
Shift
Morning Shift
Subject
Physics
Chapter
Semiconductors

MHT CET 2026 · 23 April · Morning Shift · Physics · Semiconductors

Dark current in a photo-diode depends on the

Dark current in a photo-diode depends on the

Options

  1. Aconcentration of majority carriers.
  2. Bconcentration of minority carriers.
  3. Capplied voltage.
  4. Dfrequency of the incident light.

Correct answer

B. concentration of minority carriers.

Step-by-step solution

In a photo-diode, the dark current is the current that flows when no light is incident on it. It is essentially the reverse saturation current of the p-n junction diode.

The reverse saturation current is caused by the drift of thermally generated minority charge carriers across the depletion region.

Therefore, the dark current depends on the concentration of minority carriers.

Answer: concentration of minority carriers.
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