Why are photodiodes used preferably in reverse bias condition?

(a) distinguish between metals inlsulators and simi conductors on the baisi of their energy bands (b) why are photodiodes used preferabley in reverse bias condlition can it detect a wavelength of 6000 nm justify

Why is a photodide operated in reverse bias mode? Fig. shown reverse bias current, under different illuminating intensities I_(1)I_(2),I_(3) and I_(4) for a given photodiode. Average the intensities I_(1), I_(2),I_(3) and I_(4) in decreasing order of wavelength.

State the reason, why the photodiode is always operated under reverse bias. Write the working principle of operation of a photodiode. The semiconducting material used to fabricate a photodiode, has an energy gap of 1.2 eV. Using calculations, show whether it can detect light of wavelength of 400nm incident on it

The zenar diode normally operates under reverse bias conditions, the major use of this fact is in the application s where was required

For a reverse bias P-N junction-

STATEMENT-1 : A photodiode is used in receivers in optical communication STATEMENT-2 The photodiode has a resistance that varies according to intensity of light incident on it