An electron moves in an electric field from a point with a potential of 100V to a point with a potential of 300V. What kinetic energy does an electron acquire?
Let us write down the formula reflecting the relationship between the potential difference and the voltage value:
U = φ2 – φ1;
where U is the voltage,
φ – potentials.
We also write down the formula for the relationship between voltage, work and charge:
U = A / q.
Substituting the formulas for the stresses, we get the equation:
φ2 – φ1 = A / q.
The charge of an electron is a constant constant, it is always equal to 1.6 * 10 ^ -20:
A = q (φ2 – φ1) = 1.6 * 10 ^ -20 (300 – 100) = 1.6 * 10 ^ -20 * 200 = 320 * 10 ^ -20 J.
Answer: 320 * 10 ^ -20 J.
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