Question

With rise in temperature, conductivity of copper and silicon respectively

(a) Decrease, Increase (b) Increases, Increase

(c) Decrease, Decrease (d) Increase , Decrease​

Answer 1

Answer:

(a)

Explanation:

Copper is a conductor, it's resistance is directly proportional to its temperature(temperature increases, resistance increases and if temp decreases, resis decreases). Silicon is a semi conductor, it's resistance is inversely proportional to its temperature( temp increases, resis decreases and if temp decreases, resis increases).

Answer 2

With rise in temperature, conductivity of copper and silicon respectively decreases, increases (Option a)

• Copper is an example of a metal. The resistance of metals increases linearly with the increase in temperature. Hence, their conductivity decreases as the temperature rises.
• Silicon, on the other hand, is an example of a semiconductor. Its conductivity increases with the increase in temperature and is and behaves as an insulator at absolute zero temperature.