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J & K CET Engineering J and K - CET Engineering Solved Paper-2008

  • question_answer
    Electron of mass m and charge e in external field £ experiences acceleration

    A)  \[\frac{e}{mE},\] in the  opposite direction to the field

    B)  \[\frac{eE}{m},\] in the direction of the field

    C)  \[\frac{em}{E},\] m the direction of the field

    D)  \[\frac{eE}{m},\] in the opposite direction of the field,

    Correct Answer: B

    Solution :

    \[F=qE\] or \[ma=qE\] \[\Rightarrow \] \[a=\frac{qE}{m}\] or \[a=\frac{eE}{m}\]in the direction of the field.


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