Question

ntA parallel plate capacitor with air as a dielectric is arrangedv horizontally. The lower plate is fixed. The upper plate is attached to a spring. The area of each plate is A. In the steady position the distance between the plates is do. When the capacitor is connected with an electric source with the voltage V, the distance between the plates at equilibrium becomes d1. Mass of the upper plate is m.n nta. Find the spring constant.n ntb. For given k, what is the maximum possible voltage for equilibrium?n ntc. What is the angular frequency of the oscillating system around the equilibrium value d1? (amplitude of the oscillation << d1)n

Answer 1