MHT CET Physics question

Not in JEE Advanced syllabus

Statement 1: Light emitting diode (LED) emits spontaneous radiation Statement 2: LED are forward biased p-n junctions

(A)Assertion is True, Reason is True; Reason is correct explanation for AssertionCorrect
(B)Assertion is True, Reason is True; Reason is not correct explanation for Assertion
(C)Assertion is True, Reason is False
(D)Assertion is False, Reason is True

Answer: (A)

Solution

In forward bias, electrons and holes recombine across the junction and release photons spontaneously, so

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Question ID VK-085407