An electron with kinetic energy K 1 enters between parallel plates of a capacitor at an angle α with the plates. It leaves the plates at angle β with kinetic energy K 2 . Then the ratio of kinetic energies K 1 : K 2 will be :

Question

An electron with kinetic energy K 1 enters between parallel plates of a capacitor at an angle α with the plates. It leaves the plates at angle β with kinetic energy K 2 . Then the ratio of kinetic energies K 1 : K 2 will be :, sin 2 β cos 2 α, cos β sin α, cos β cos α, cos 2 β cos 2 α

MARKS App · Accepted Answer

velocity along the plate will not change. ∴ v 1 cos α = v 2 cos β K 1 K 2 ⇒ v 1 2 v 2 2 = cos 2 β cos 2 α

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