Question 4
(a) Define the term resonance in a series RLC circuit.
(b) Sketch and label the frequency response curve of a resonance circuit.
(c) A series RLC resonant circuit has an inductance of 10 mH and capacitance of 10 µF Calculate the resonant frequency.
The expected responses were:
(a )Definition of the term resonance
Resonance is that phenomenon which in the RLC circuit leads to a purely resistive
impedance (when XL = XC).
(b) Sketch of frequency response curve of a resonance circuit
OR
(c)
It was reported that while majority of the candidates that attempted this question did not show understanding of the frequency response curve, many of them responded fairly well to the other tasks in the question.