A strip of copper and another of germanium are cooled from room temperature to $80 \mathrm{~K}$. The…

A strip of copper and another of germanium are cooled from room temperature to $80 \mathrm{~K}$. The resistance of
  1. each of these decreases
  2. copper strip increases and that of germanium decreases
  3. copper strip decreases and that of germanium increases
  4. each of these increases

Solution

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Asked in: JEE Main 2003

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