MHT CET Physics question

Physics Semiconductor Electronics MHT CET

Not in JEE Advanced syllabus

At elevated temperature, few of covalent bonds of Si or Ge are broken and a vacancy in the bond is created. Effective charge of vacancy or hole is

(A)positiveCorrect
(B)negative
(C)neutral
(D)sometimes positive and sometimes negative

Answer: (A)

Solution

The missing electron leaves an uncompensated positive ion core, so the vacancy behaves as an

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Question ID VK-074991