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

  • question_answer
    In Millikan's experiment for the determination of the charge on the electron, the reason for using the oil is

    A)            It is a lubricant                     

    B)            Its density is higher

    C)            It vapourises easily            

    D)            It does not vapourise

    Correct Answer: D

    Solution :

               In Millikan's experiment, drops of non-volatile liquid (cloak oil) are used to prevent evaporation.


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