An alternating emf of frequency 50 Hz is applied to a circuit with a resistor of 20 Ω, an inductor of 100 mH and a capacitor of 30 ηF connected in series.
(i) What is the angle by which the current leads or lags the applied emf ?
(ii) Represent the voltage and the current in a vector diagram showing the phase angle.
Let B be the magnetic field intensity.
e = Motional emf developed the two ends
Induced emf, e = BLV
So,
So, force on conductor XY experiences
Force, F = ILB
So,
Work done, W = F.S = ;
where S is distance travelled in one second which is equal to V.