A capacitor, resistor and inductor are connected in series with an AC source.
(i) What should be the frequency of the source such that current drawn in the circuit is maximum?
What is this frequency called ?
(ii) If the peak value of e.m.f. of the source is find the maximum current.
(iii) Draw a graph showing variation of amplitude of circuit current with changing frequency of applied
voltage in a series LRC circuit for two different values of resistance and
(iv) Define the term 'Sharpness of Resonance'. Under what condition, does a circuit become more
selective ? (5 marks)
(i) (1 marks)
(ii) (1 marks)
(iv) is measure of sharpness of resonance, where is the resonant frequency and is
the resonant frequency and is the bandwidth. (1 marks)
Circuit is more selective if it has greater value of sharpness/The circuit should have smaller