Illustrate the phenomena of resonance in series LCR A/C circuit with illustration.

Explanation

At resonant frequency, the current amplitude is maximum`l_m = V_m/R`, Resonant circuits have a variety of applications. For example in tunign mechanism of a radio or TV set. The antennas of a radio accepts sighnals from many broadcasting stations. The signals picked up in the antennas act as a source in the tuning circuit of the radio. So the circuit can be DRIVEN at many trequencies. But to hear one paricular radio station, we tune the radio. In tuning, we vary the capacitance of a capacitor such that resonant frequency of the circuit becomes nearly equal to the frequency of radio signal received. When this happens, the amplitude of the crrect with the frequency of the signal of the particular radio instation in the circuit is maximum.