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Series Resonance or Voltage Resonance

Description: 1148.png
Series RLC Resonant Circuit
The basic series-resonant circuit is shown in the Figure. We want to observe how the steady state amplitude and the phase angle of the current vary with the frequency of the sinusoidal voltage source. As the frequency of the source changes, the maximum amplitude of the source voltage (Vm) is held constant.

Quality Factor or Circuit Magnification Factor(Q)

It is defined as ,

Voltage Across Elements
Voltage across Resistance
Since V = RI and at resonance VR = Vm, Therefore, Description: 3256.png

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