MHT CET 2026 Physics question

Not in JEE Advanced syllabus

Photodiode is a device

(A)in which photocurrent is dependent on reverse bias.
(B)in which photocurrent is independent of incident radiation.
(C)which is always operated in forward bias.
(D)which is always operated in reverse bias.Correct

Answer: (D)

Solution

A photodiode is a p-n junction diode designed to detect light. It is always operated in reverse bias, because the fractional change in the (small) reverse current caused by the photo-generated minority carriers is then large and easy to measure, whereas in forward bias the large majority-carrier current would swamp

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Question ID VK-098596