H2P-391

Charges in a uniform electric field

H2 Physics · JC 2 · Easy · Charges in a uniform electric field

An alpha particle of charge +2e and mass m is accelerated from rest through a potential difference of 1.5 kV in a vacuum. Using energy conservation between electric potential energy and kinetic energy, what is its final speed?

$v = \sqrt{2qV/m}$
$v = \sqrt{qV/2m}$
$v = 2qV/m$
$v = \sqrt{m/2qV}$

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