JEE Main & Advanced Physics Photo Electric Effect, X- Rays & Matter Waves Question Bank Photon and Photoelectric Effect

  • question_answer
    When the light source is kept 20 cm away from a photo cell, stopping potential 0.6 V is obtained. When source is kept 40 cm away, the stopping potential will be    [MP PMT 1994]

    A)            0.3 V                                        

    B)            0.6 V

    C)            1.2 V                                        

    D)            2.4 V

    Correct Answer: B

    Solution :

               Stopping potential does not depend on the relative distance between the source and the cell.


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