First slide

Introduction-Semiconductor electronics: Materials; devices and simple circuits

Question

In "Al" and "Si" , if temperature is changed from normal temperature to 70 K then

Easy

A

The resistance of Al will increase and that of Si will decrease
B

The resistance of Al will decrease and that of Si will increase
C

Resistance of both decrease
D

Resistance of both increase

Solution

A temperature decreases, resistance of metal decreases (less collision) and resistance of semiconductor increases (less electron-hole pair).

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