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(a) Explain the term ‘sharpness of resonance’ in ac circuit.

(b) In a series LCR circuit, V_L=V_C≠V_R. What is the value of power factor for this circuit ?

OR

An ac source of emf V=V₀sinωt is connected to a capacitor of capacitance C. Deduce the expression for the current (I) flowing in it. Plot the graph of 

(i) V vs. ωt, and 

(ii)I vs. ωt.