A strip of copper and another of germanium are cooled from room temperature to $80 K$ . The resistance of
each of these decreases.
copper strip decreases and that of germanium decreases.
copper strip decreases and that of germanium decreases.
each of these increases.

Question

A strip of copper and another of germanium are cooled from room temperature to $80 K$ . The resistance of
each of these decreases.
copper strip decreases and that of germanium decreases.
copper strip decreases and that of germanium decreases.
each of these increases.

Toppr Admin · Accepted Answer

The conductors have positive-xA0-temperature coefficient of resistivity and-xA0-semiconductors has negative temperature coefficient of resistivity-Hence-xA0-A strip of copper -conductor- and another of germanium -semiconductor- are-xA0-cooled from room temperature to 80-xA0-K- The-xA0-resistance of-xA0-copper strip decreases and that of germanium increases-

A strip of copper and another of germanium are cooled from room temperature to 80 K. The resistance ofeach of these decreases.copper strip decreases and that of germanium decreases.copper strip decreases and that of germanium decreases.each of these increases.

A strip of copper and another of germanium are cooled from room temperature to $80 K$ . The resistance of
each of these decreases.
copper strip decreases and that of germanium decreases.
copper strip decreases and that of germanium decreases.
each of these increases.