Home
Class 12
PHYSICS
The current in the forward bias is known...

The current in the forward bias is known to be more (mA) than the current in the reverse bias (`~ mu`A). What is the reason, then why photo diodes is to operate in reverse bias.

Text Solution

Verified by Experts

Even though the current in forward bias has a larger magnitude, the change, due to changes in light intensity, in the minority carrier dominated reverse bias current, is more and is, therefore, more easily detectable.
Promotional Banner

Topper's Solved these Questions

  • SEMI-CONDUCTORS ELECTRONICS

    OSWAAL PUBLICATION|Exercise TOPIC -2 SEMICONDUCTOR DIODES AND THEIR APPLICATIONS (SHORT ANSWER TYPE QUESTIONS- II)|9 Videos

  • SEMI-CONDUCTORS ELECTRONICS

    OSWAAL PUBLICATION|Exercise TOPIC -2 SEMICONDUCTOR DIODES AND THEIR APPLICATIONS (LONG ANSWER TYPE QUESTIONS-|6 Videos

  • SEMI-CONDUCTORS ELECTRONICS

    OSWAAL PUBLICATION|Exercise TOPIC -2 SEMICONDUCTOR DIODES AND THEIR APPLICATIONS (VERY SHORT ANSWER TYPE QUESTIONS)|6 Videos

  • Sample Paper 8

    OSWAAL PUBLICATION|Exercise Exercise|37 Videos

  • SOLVED PAPER (II PUC JULY 2016)

    OSWAAL PUBLICATION|Exercise PART D|11 Videos

Similar Questions

Explore conceptually related problems

Why is photodiode used in reverse bias ?

What do you mean by forward bias ?

What is the forward bias resistance of an ideal junction diode?

A straight horizontal conducting rod of length 0.45 m and mass 60 g is suspended by two vertical wires at its ends. A current of 5.0 A is set up in the rod through the wires. (a) What magnetic field should be set up normal to the conductor in order that the tension in the wires is zero? (b) What will be the total tension in the wires if the direction of current is reversed, keeping the magnetic field same as before?

On increasing the reverse bias to a large value in a p-n junction diode current

What is the type of bias b/w CB and EB for normal operation?

What is the reverse bias resistance of an ideal junction diode?