Question
Physics Question on Semiconductor electronics: materials, devices and simple circuits
The resistivity of a semiconductor increases with temperature. The atoms of a semiconductor vibrate with large amplitude at higher temperatures there by increasing its resistivity.
Both assertion and reason are true and reason is the correct explanation of assertion
Both assertion and reason are true but reason is not the correct explanation of assertion
Assertion is true but reason is false
Both assertion and reason are false
Both assertion and reason are false
Solution
Solids whose electrical conductivity is intermediate between conductor and insulators are called semiconductor. Carbon, silicon and germanium are example of semiconductors. The temperature coefficient of resistance of semiconductors is negative that is their electrical resistance decreases ( or conductivity increases) with rise in temperature.