Q132 / 180 · AIIMS 2005 · Physics

Assertion : The number of electrons in a $p$-type silicon semiconductor is less than the number of electrons in a pure silicon semiconductor at room temperature. Reason : It is due to law of mass action.

  • Correct answer
    A
    If both assertion and reason are true and reason is the correct explanation of assertion
  • B
    If both assertion and reason are true but reason is not the correct explanation of assertion
  • C
    If assertion is true but reason is false
  • D
    If both assertion and reason are false.

Solution

According to law of mass action, $n_i{ }^2=n_e n_h$ In $p$-type semiconductor $n_h>n_e$

Hence, the correct answer is option: 'A'.

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