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

  • question_answer
    The mass of a particle is 400 times than that of an electron and the charge is double. The particle is accelerated by 5 V. Initially the particle remained in rest, then its final kinetic energy will be                                [MP PMT 1990]

    A)            5 eV                                         

    B)            10 eV

    C)            100 eV                                     

    D)            2000 eV

    Correct Answer: B

    Solution :

               \[E=eV=2e\times 5=10\ eV\]


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