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Question

Question: For germanium crystal, the forbidden energy gap in joules is....

For germanium crystal, the forbidden energy gap in joules is.

A

1.12×10−191.12 \times 10^{- 19}

B

1.76×10−191.76 \times 10^{- 19}

C

1.6×10−191.6 \times 10^{- 19}

D

Zero

Answer

1.12×10−191.12 \times 10^{- 19}

Explanation

Solution

For Ge,

Eg=0.7eV=0.7×1.6×10−19J=1.12×10−19JE_{g} = 0.7eV = 0.7 \times 1.6 \times 10^{- 19}J = 1.12 \times 10^{- 19}J