(A) The forbidden energy gap $({E_g})$ for germanium $(Ge)$ at room temperature is approximately $0.7 \ eV$.To convert this value from electron-volts

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(A) The forbidden energy gap $({E_g})$ for germanium $(Ge)$ at room temperature is approximately $0.7 \ eV$.To convert this value from electron-volts $(eV)$ to joules $(J)$,we use the conversion factor $1 \ eV = 1.6 \times 10^{-19} \ J$.Therefore,${E_g} = 0.7 \ eV = 0.7 \times 1.6 \times 10^{-19} \ J$.${E_g} = 1.12 \times 10^{-19} \ J$.

Class 12 Physics Semiconductor Electronics Classification of Materials and Energy Band Theory

Easy

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

A
$1.12 \times 10^{-19} \ J$
B
$1.76 \times 10^{-19} \ J$
C
$1.6 \times 10^{-19} \ J$
D
Zero

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

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