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BVP Medical BVP Medical Solved Paper-2004

  • question_answer
    An electron initially at rest, is accelerated through a potential difference of 200 volt, so that it acquires a velocity\[20A{{m}^{2}}\] The value of e/m of electron will be :

    A) \[8.0A{{m}^{2}}\]            

    B) \[3\times {{10}^{-6}}C\]

    C) \[6\times {{10}^{-3}}N\]              

    D)  none of these

    Correct Answer: B

    Solution :

                                                        K.E. gained by the electron when accelerated to a potential difference of V volt = eV  where v is the velocity acquired by electron Now    \[4\times {{10}^{-4}}\] or            \[1.07\times {{10}^{7}}m/s\]      (Here: V = 200 volts, \[0.53\times {{10}^{7}}m/s\])                 \[1.53\times {{10}^{7}}m/s\]     


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