Two parallel plates are separated by 0.1 mm. A 10 V potential difference is maintained between those plates. If a proton is released from the positive plate, calculate the kinetic energy of the proton when it reaches the negative plate.

K. E = 1.6 x 10⁻¹⁸ J

Explanation:

given,

thickness between two plate = t = 0.1 mm

Voltage difference between two plate = 10 V

charge of proton = q = 1.6 x 10⁻¹⁹ C

When the charge moves from positive to negative the potential energy reduces to kinetic energy

K. E = Δ PE

K. E = q Δ V

K. E = 1.6 x 10⁻¹⁹ x 10

K. E = 1.6 x 10⁻¹⁸ J

so, the kinetic energy of the proton when it reaches negative plate is equal to K. E = 1.6 x 10⁻¹⁸ J