APPARATUS (Solid & Liquid) It consists of following parts. · · · · · · · Consists of R.F. Generator (Range: 78MHz approx.). Analog Micro ammeter 0-100 mA Potentiometer for Sensitivity selection Fixed Capacitors for solid and liquid experiments (Metal). Variable Gang Capacitor. Sockets for test capacitor and variable capacitor brought out at front panel. One solid Bakelite plate to be insert in gap of test capacitor.