A dielectric is a material having low electrical conductivity in comparison to that of a metal. It is characterized by its dielectric
constant. Dielectric constant is measured as the ratio of the capacitance C of an electrical condenser filled with the dielectric to the capacitance C0 of the evacuated condenser i.e.
ε = C/C0
Knowledge of the dielectric constant is of interest particularly to the Physicists and Engineers. A simple experimental set up is designed to measure the dielectric constant of solid samples in both range- LOW & HIGH.
The experimental set-up consists of :
i) Main Unit having audio oscillator (1 KHz), digital voltmeter (0 – 9.99 V dc), standard
capacitance and electronic circuitry.
ii) Dielectric Cells: 75 mm Gold plated brass discs (1 set) and 25 mm Gold plated brass
discs (1 set).
iii) Samples : Low Range : Glass, Backelite
Hi Range : PZT DISC