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  4. Mass of the proton is 1840 times that of electron. It is accelerated through a potential difference of 1 V. Find its kinetic energy.

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Q. Mass of the proton is $1840$ times that of electron. It is accelerated through a potential difference of $1\, V$. Find its kinetic energy.

AIIMSAIIMS 2001Dual Nature of Radiation and Matter

Solution:

The charge on a proton $= e$. Hence when the proton is accelerated through a potential difference of $1V$, its $K.E. = 1\,eV$.