On heating, the resistance of a semiconductor
- Aincreases
- Bdecreases
- Cremains same
- Dfirst increases and then decreases
- ENone of the above / More than one of the above
Show answer and explanation
Correct answer: (b) decreases
Explanation
In a semiconductor, heating breaks covalent bonds and releases more free electrons.
More charge carriers raise conductivity, so resistance decreases with temperature.
This is opposite to a metallic conductor, whose resistance rises on heating.