Assertion: A P-N junction diode is used in re | vedclass

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Question

(A) photodiode is a special type of $P-N$ junction diode that is operated under reverse bias conditions.When light of energy $h
u > E_g$ is incident

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Both Assertion & Reason are True & the Reason is a correct explanation of the Assertion.

Vedclass · Answer

(A) photodiode is a special type of $P-N$ junction diode that is operated under reverse bias conditions.When light of energy $h
u > E_g$ is incident on the junction,electron-hole pairs are generated.In reverse bias,the electric field at the junction is strong,which sweeps the generated charge carriers across the junction,creating a photocurrent.The magnitude of this photocurrent is directly proportional to the intensity of the incident light.Even though the reverse saturation current is very small,it is highly sensitive to the intensity of incident light,making it an ideal device for light detection.Therefore,both the Assertion and the Reason are true,and the Reason correctly explains the Assertion.

Assertion: $A$ $P-N$ junction diode is used in reverse bias to detect the intensity of light.
Reason: In reverse bias condition,current is small but it is more sensitive to changes in intensity of incident light.

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Assertion: $A$ $P-N$ junction diode is used in reverse bias to detect the intensity of light.Reason: In reverse bias condition,current is small but it is more sensitive to changes in intensity of incident light.