AIIMS 2019 Physics Photodiodes Assertion Reason Question
Assertion : Photodiode current work in reverse bias.
Reason : Change in diode increases with increase in intensity.
Both assertion and reason are true, and reason is the correct explanation of assertion.
Both assertion and reason are true, but reason is not the correct explanation of assertion.
Assertion is true, but reason is false.
Both assertion and reason are false.
Correct Answer
Detailed Explanation
Option B is correct because both the assertion about photodiodes generating electric current when reverse biased and the reason regarding the dependence of diode current on photon intensity are true; however, the reason does not directly explain the assertion. The assertion refers to the fundamental operation of photodiodes, while the reason merely states a correlation without addressing the underlying mechanism of photon absorption and electron-hole pair generation. Options A and C are incorrect because they misinterpret the relationship between the assertion and reason, and option D is incorrect as both statements are indeed true. Understanding this distinction is crucial for grasping how photodiodes function in converting light energy into electrical signals.
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