For a series RLC circuit supplied by an alternating emf of angular frequency ω
PHYSICS · Multi-part · CBSE · Physics · Alternating Current · Alternating Current
Problem
For a series RLC circuit supplied by an alternating emf of angular frequency ω, the current I is generally out of phase with the supply voltage V.
(i) Construct the phasor diagram for current and the three voltage drops.
(ii) Starting from the diagram, prove that the phase angle φ between V and I is given by tanϕ=RXL−XC.
(iii) From the proven relation, state clearly whether the current leads or lags the voltage when XC>XL and when XL>XC.