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JEE Main & Advanced Physics Semiconducting Devices Question Bank Semiconductors

  • question_answer
    If \[{{n}_{e}}\] and \[{{n}_{h}}\] are the number of electrons and holes in a semiconductor heavily doped with phosphorus, then  [MP PMT 2000]

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

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

    C)            \[{{n}_{e}}\le {{n}_{h}}\]

    D)            \[{{n}_{e}}={{n}_{h}}\]

    Correct Answer: A

    Solution :

               Phosphorus is a pentavalent impurity so ne > nh.


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