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

  • question_answer
    When the speed of electrons increases, then the value of its specific charge                                       [MP PMT 1994]

    A)            Increases

    B)            Decreases

    C)            Remains unchanged

    D)            Increases upto some velocity and then begins to decrease

    Correct Answer: B

    Solution :

               Refer Q.No. 9. Here the velocity of electron increases, so as per Einstein?s equation mass of the electron increases, hence the specific charge \[\frac{e}{m}\] decreases.


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