Semiconductor Electronics question for NEET / JEE Main, with solution

Answer: (A) decreases, because more electron–hole pairs are produced

Heating gives more valence electrons enough energy to cross the band gap, so the number of free electrons and holes rises sharply. This outweighs the small fall in mobility, so resistance decreases: semiconductors have a negative temperature coefficient of resistance.

Solution by Sreeraj P, M.Sc Physics