question_answer

In a semiconducting material the mobilities of electrons and holes are me and mh respectively. Which of the following is true                                                                        [AIIMS 2005]

A)            \[{{\mu }_{e}}>{{\mu }_{h}}\]                                          

B)            \[{{\mu }_{e}}<{{\mu }_{h}}\]

C)            \[{{\mu }_{e}}={{\mu }_{h}}\]                                          

D)            \[{{\mu }_{e}}<0;\ {{\mu }_{h}}>0\]