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A strip of copper and another of germanium are cooled from room temperature to 80 K. The resistance of

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a
each of these increases
b
each of these decreases
c
copper strip increases and that of germanium decreases
d
copper strip decreases and that of germanium increases
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detailed solution

Correct option is D

For conductors, Resistance ∝ Temperature and for semiconductors, Resistance  ∝  1Temperature

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