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The energy gap of germanium is given as approximately:
A5.4 electron volts
B1.1 electron volts
C9.1 electron volts
D0.7 electron volts
Answer & Solution
Correct answer: D. 0.7 electron volts
1. Germanium conducts more readily than silicon at room temperature.
2. That follows from having the smaller gap of the two.
3. For C, Si and Ge the energy gaps are 5.4 eV, 1.1 eV and 0.7 eV respectively.
4. So germanium is about 0.7 eV.
_Source: NCERT Class XII Physics Part II, Ch 14 'Semiconductor Electronics'_
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