Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
MHT CET Medical202623 April 2026Morning ShiftPhysicsSemiconductorsActual

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.

Practice Semiconductors on Quantrex Academy →

More from Semiconductors

For two inputs A and B and output Y, the Boolean expression for NOR gate is 2026For an n-type semiconductor, the relation between the number density ' n_h ' and ' n_e ' is 2026A silicon crystal is doped with 5 10¹⁷ cm ⁻³ atoms of boron. The electron concentration (n_e) at room temperature is (n_i = 1.5 10¹⁰ cm ⁻³) 2026If the current gain in common-base configuration ( ) of a transistor increases from 0.95 to 0.96, the percentage change in current gain in common-emitter configuration ( ) is appro 2026Out of the following what is used to detect the intensity of light ? 2026The color of light emitted by an LED is determined primarily by which of the following factors? 2026Which of the following is true for a p-type semiconductor? 2026In case of semiconductors, the band gap between the valence band and conduction band is 2026 Full Semiconductors list All MHT CET Medical PYQs