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JEE Main & Advanced Physics Semiconducting Devices Question Bank Semiconductor Diode

  • question_answer
    A semiconductor device is connected in a series circuit with a battery and a resistance. A current is found to pass through the circuit. If the polarity of the battery is reversed, the current drops almost to zero. The device may be [MP PET 1995; CBSE PMT 1998]

    A)            A P-type semiconductor 

    B)            An N-type semiconductor

    C)            A PN-junction                      

    D)            An intrinsic semiconductor

    Correct Answer: C

    Solution :

               When polarity of the battery is reversed, the P-N junction becomes reverse biased so no current flows.


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