We calculate the classical or non-relativistic velocity of an electron under the influence of an electric field as:
vn = √(2eVa / m),
where:
vn — Classical or non-relativistic velocity;
e — Elementary charge, or the charge of an electron (e = 1.602 × 10-19 C);
Va — Accelerating potential, or the potential difference that is applied to accelerate the electron; and
m — The mass of an electron (m = 9.109 × 10-31 kg).
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