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For metals, the energy gap is described as being approximately:
AZero
BNine
CSeven
DTwelve
Answer & Solution
Correct answer: A. Zero
1. A metal conducts freely at any temperature.
2. Nothing stands between its valence and conduction bands.
3. While for metals the energy gap is approximately zero.
4. So the answer is zero.
_Source: NCERT Class XII Physics Part II, Ch 14 'Semiconductor Electronics'_
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