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

  • question_answer
    The kinetic energy of an electron which is accelerated through a potential of 100 volts is [MP PET 1986; CBSE PMT 1997; AIIMS 1998]

    A)            \[1.602\times {{10}^{-17}}J\]

    B)            418.6 calories

    C)            \[1.16\times {{10}^{4}}K\]     

    D)            \[6.626\times {{10}^{-34}}\]W- sec

    Correct Answer: A

    Solution :

               \[K=Q.V=1.6\times {{10}^{-19}}\times 100=1.6\times {{10}^{-17}}\,\,Joules\]


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