Copper and Germanium are cooled from room temperature to $100 \ K$. Then,the resistance of
- Agermanium increases,copper increases
- Bgermanium decreases,copper increases
- Cgermanium decreases,copper decreases
- Dgermanium increases,copper decreases
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$A$ solid reflects incident light and its electrical conductivity decreases with temperature. The binding in this solid is
In which of the following is an ionic bond present?
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View SolutionStatement-$1$: The temperature coefficient of resistance of an intrinsic semiconductor is negative.
Statement-$2$: As temperature increases,more charge carriers are released into the conduction band.
Statement-$2$: As temperature increases,more charge carriers are released into the conduction band.
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View SolutionAt ordinary temperatures, the electrical conductivity of semiconductors in $S/m$ (or $mho/m$) is in the range:
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View SolutionWhich of the following substances has an energy gap $(E_g)$ greater than $3 \ eV$?
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