JEE · NEET Previous Year Question
A strip of copper and another of germanium are cooled from room temperature to 80 K. The resistance of :
Topic: JEE PYQ
Answer: C. Full step-by-step solution below.
- Aeach of these decreases
- Bcopper strip increases and that of germanium decreases
- Ccopper strip decreases and that of germanium increases
- Deach of these increases
Correct answer: C
Solution
(c) 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.More Semiconductor Devices PYQs
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