A series circuit is driven by a source of peak emf
PHYSICS · Subjective · CBSE · Physics · Alternating Current · Alternating Current
Problem
A series RLC circuit is driven by a source of peak emf Em. The resistance of the circuit is 25Ω.
(i) Derive an expression for the amplitude of current as a function of the driving angular frequency.
(ii) Using the result of part (i), show that the current amplitude attains its maximum value at the resonant frequency and obtain that maximum value in terms of Em and the resistance.
(iii) If Em=150V, calculate the average power dissipated in the circuit at resonance.