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

Question

A strip of copper and another germanium are cooled from room temperature to 80 K. The resistance of (A) each of these decreases (B) copper strip increases and that of germanium decreases (C) copper strip decreases and that of germanium increases (D) each of these increases

Tardigrade Admin · Accepted Answer

The temperature coefficient of resistance of copper is positive and that of germanium is negative, therefore when copper and germanium are cooled, resistance of copper strip decreases and that of germanium increases.

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

each of these decreases

copper strip increases and that of germanium decreases

copper strip decreases and that of germanium increases

each of these increases

The temperature coefficient of resistance of copper is positive and that of germanium is negative, therefore when copper and germanium are cooled, resistance of copper strip decreases and that of germanium increases.

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