MHT CET Physics question

Not in JEE Advanced syllabus

for silicon is 1.12 eV and that for germanium is 0.72 eV. Therefore, it can be concluded that

(A)more number of electron-hole pairs will be generated in silicon than in germanium at room temperature
(B)less number of electron-hole pairs will be generated in silicon than in germanium at room temperatureCorrect
(C)equal number of electron-hole pairs will be generated in both at lower temperatures
(D)equal number of electron-hole pairs will be generated in both at higher temperatures

Answer: (B)

Solution

The smaller the gap, the more pairs are generated, so germanium (0.72 eV) gives more pairs than silicon (1.12 eV)

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Question ID VK-075016