LRC Circuit Electromagnetism Labs 1- Introduction & Brief Description of the Concepts The purpose of this experiment is to study an inductor-resistor-capacitor circuit (LRC circuit), most importantly we will study how a resonant LRC circuit is created. This is done by examining the current through the circuit as a function of the equency of the applied voltage. When a vibrating mechanical system is set in motion, it vibrates at its natural frequency. However, a mechanical system can be forced to vibrate at a different equency. The amplitude of vibration, and hence the energy transferred to the system, depends on the difference between the natural frequency and the frequency of forced vibration. The amplitude becomes very large when the difference between the natural and forced frequency becomes very small. l 1513 IS Known as resonance and the natural frequency of the system is sometimes called the resonant frequency. At resonance, relatively little energy is required to get a large amplitude. One example of resonance is when a singer's amplified voice is used to shatter a glass. Electrical resonance is analogous to mechanical resonance. The energy transferred to a system is maximized at resonance. The amplitude of the AC current (10) in a series LRC circuit is dependent on the amplitude of the applied voltage ( V0) and the .. _ V . . impedance (Z):