Obtain the resonant frequency and Q – factor of a series LCR circuit with L = 3H, C = 27μF, R = 7.4Ω. It is desired to improve the sharpness of resonance of circuit by reducing its full width at half maximum by a factor of 2. Suggest a suitable way.
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Answer:
w = 1/√LC
w = 1/9 ×10^-3
f = w/2π
Q = w/Bw
Q = 1/R√L/C
Q = 45
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