AIM: To determine the dielectric constant of different materials by resonance method
APPARATUS REQUIRED: RF Oscillator, Test Capacitor, Variable Capacitor, Test Dielectric
Material and Patch CordsFORMULA: The dielectric constant is given by: K= C.d/Eo A
Where, d = distance between two plates
A = Area of plate
C = Capacitance
ε0 = free space permittivity 8.854 X 10-12 Fm-1
Instructions:
1. Test capacitor's plate must be tight when filled with a dielectric material.
2. Observations must be taken carefully.
3. Patch cords should be tightly connected.
Principle:
In the high-frequency range resonance methods are
generally used to measure the capacitance and the dielectric constant. Resonance method involves the injection of voltage or current into an L-C resonant
circuit. An
oscillatory circuit that includes a standard capacitor is tuned to resonance and the corresponding value of capacitance
Observations:
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