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The manifestation of band structure in solids is due to
For non-conductors, the energy gap is
The valence band and conduction band of a solid overlap at low temperature, the solid may be
The energy band gap is maximum in
The band gap in Germanium and silicon in eV respectively is
Wires P and Q have the same resistance at ordinary (room) temperature. When heated, resistance of P increases and that of Q decreases. We conclude that
The nature of binding for a crystal with alternate and evenly spaced positive and negative ions is
If the distance between the conduction band and valence band is 1 eV, then this combination is
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