Choose only the wrong statement from the following :
A. In conductors the valence and conduction bands may overlap
B. Substances withenergy gap of the order of 10 eV are insulators
C. The resistivity of a semiconductor increases with increase in temperature
D. The conductivity of a semiconductor increases with increase in temperature
A. In conductors the valence and conduction bands may overlap
B. Substances withenergy gap of the order of 10 eV are insulators
C. The resistivity of a semiconductor increases with increase in temperature
D. The conductivity of a semiconductor increases with increase in temperature
Correct Answer – C
(a),(b) and (d) are correct. (c ) is wrong.
Resistivity of a semiconductor decreases with increase in temperature .