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  4. An α -particle is accelerated through a potential difference of 200 V. The increase in its kinetic energy is

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Q. An $\alpha$ -particle is accelerated through a potential difference of $200\, V$. The increase in its kinetic energy is

Electrostatic Potential and Capacitance

Solution:

$K E=Q V \Rightarrow K E$
$=(2 e) 200\, V =400\, eV$