Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa
  • Home
  • School
  • (i) Describe the working of photodiode by drawing the circuit diagram. (ii) Draw the characteristics of a photodiode for different illumination intensities. (iii) Why is photodiode operated in reverse bias even though the reverse bias cur

(i) Describe the working of photodiode by drawing the circuit diagram.
(ii) Draw the characteristics of a photodiode for different illumination intensities.
(iii) Why is photodiode operated in reverse bias even though the reverse bias current is much weaker than the current in forward bias?

 

 

 

 
 
 
 
 

Answers (1)

(i)

\rightarrow The photodiode is operated under reverse bias

\rightarrow When a light wave with energy (hV) greater than the energy gap of the semiconductor (E_{g}) falss on photodiode, electron-hole pairs are generated due to the absorption of photon.

\rightarrow Due to the electric field at the junction, the electrons and holes are separated before they recombine.

\rightarrow Electrons and holes are collected on n side & P side respectively giving rise to an emf and a current flows when an external load is connected.

(ii)

(iii) When a reverse bias is applied it is easy to observe the change in current with the change in intensity.

Posted by

Safeer PP

View full answer

Crack CUET with india's "Best Teachers"

  • HD Video Lectures
  • Unlimited Mock Tests
  • Faculty Support
cuet_ads

Similar Questions

Trending Articles/News

anam-khan

CBSE Board 2025: Class 10th, 12th supplementary date sheet out; exams from July 15
anam-khan

CBSE issues final reminder to schools for supplementary exam LOC submission; submit by today without late fee
anam-khan

CBSE Supplementary Exam 2025: Registrations open for Class 10, 12 private students today

Latest Question