Question

In a semiconducting material, the mobilities of electrons and holes are ${\mu }_e$ and ${\mu }_h$ respectively. Which of the following is true?

• A. ${\mu }_e<{\mu }_h$
• B. ${\mu }_e={\mu }_h$
• C. ${\mu }_e<0,{\mu }_h>0$
• D. ${\mu }_e>{\mu }_h$

Answer 1

Answer: (D)

${\mu }_e>{\mu }_h$

The mobility of $e^{-}$ is greater than holes because $e^{-}$ acquire less energy to move.