Question
Physics Question on Semiconductor electronics: materials, devices and simple circuits
Which one of the following statement is correct in the case of light emitting diodes?
A
lt is a heavily doped p-n junction
B
lt emits light only when it is forward biased
C
It emits light only when it is reverse biased
D
The energy of the light emitted is less than the energy of the semiconductor used
Answer
lt emits light only when it is forward biased
Explanation
Solution
Light emitting diodes are specially designed diodes which give out light radiations when forward biased. LED's are made of Ga AsP, Ga P, etc .