FYKOS Year 25 Series 1 Problem 4 — drrrrr · FYKOS 25 #25.1.4
Physics · mechanics · electromagnetism
Problem
A small conductive ball of negligible size is bouncing between two charged plates of opposite polarities. What is the frequency of the resulting periodic motion of the ball? Voltage between the plates is U. When the ball touches a charged plate it charges to a charge of magnitude Q whose polarity is the same as polarity of the plate. The ratio of kinetic energies of the ball before and after an impact is k.
Bonus: Does the output power of this resistor correspond to the energy losses during impacts?