LCR meter: A LCR meter (Inductance L, Capacitance C, and Resistance R) test equipment used to measure the inductance, capacitance and, resistance of a component. It works on the principle of impedance measurement. In general versions of LCR meter, these quantities are not measured directly, but determined from a measurement of impedance. The necessary calculations are, incorporated in the instrument's circuitry; the meter reads L, C and R directly with no human calculation required. It will determine the relative change in magnitude of the repetitive variations of the voltage and current known as amplitudes.