question_answer

In a semiconducting material, the mobility?s 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) \[{{\mu }_{e}}>{{\mu }_{h}}\]