Assertion : Electron has higher mobility than hole in a semiconductor. \ Reason : Mass of electron

Question

Assertion : Electron has higher mobility than hole in a semiconductor. \ Reason : Mass of electron is less than the mass of hole.

Professor PC Thomas Classes · Answer

(a) : Mobility $(\mu)$ is defined as the magnitude of drift velocity per unit electric field.\ $ \mu=\frac{\left|v_dight|}{E} $ \As drift velocity, $v_d \propto \frac{1}{m}$ Therefore, the mobility of electron is higher than that of hole, as holes have a higher mass.