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Q. A proton is accelerated through $50,000\, V$. Its energy will increase by

Electrostatic Potential and Capacitance

Solution:

Kinetic energy $K=Q . V$
$\Rightarrow K=(+ e)(50000\, V)$
$=50000\, eV =50000 \times 1.6 \times 10^{-19} J$
$=8 \times 10^{-15} J$