In a semiconducting material the mobilities of electrons and holes are `mu_(e)` and `mu_(h)` respectively. Which of the following is true?

Options

A. `mu_(e) lt mu_(h)`
B. `mu_(e) gt mu_(h)`
C. `mu_(e)=mu_(h)`
D. `mu_(e) lt 0 , mu_(h) gt 0`

Answer

B

Explanation

In a semiconductor, hole is equivalent to positively charged particle which moves in a direction opposite to that of an electron. Since electrons are lighter in mass compared to positively charged particles they move easily in the semiconducting material. Hence, the mobility of holes in `p`-type semiconductor is less than mobility of electrons in `n`-type semiconductor. i.e. `n_(e)gtn_(h)`