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JCECE Engineering JCECE Engineering Solved Paper-2004

  • question_answer
    When two semiconductors of \[p\] and \[n\] type are brought into contact, they form a \[p-n\] junction which acts like a:

    A)  rectifier                              

    B)  amplifier

    C)  oscillator            

    D)  conductor

    Correct Answer: D

    Solution :

    A \[p\text{-}n\] junction diode works as a rectifier. It offers a low resistance for the current to flow when it is forward biased but a very high resistance when reverse-biased, thus it allows current through it only in one direction and acts as a rectifier. The junction diode can be used either as a half wave rectifier or as a full wave rectifier. Note: A junction diode cannot amplify a signal.


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