Question

In a LCR circuit, an inductance of 10 mH, a resistance of 3 Ω, and a capacitor of 1 µF are connected in series through an ac source 15 cosωt V. At the frequency less than 10% of resonant frequency, find out the peak value of current.

Answer 1

Inductance (L) = 10 mH = 10 × 10^-3 H
Resistance (R) = 3 Ω
Capacitance (C) = 1 µF = 10^-6 F
Source of potential (V) = 15 cos ωt V and compare by the relation
V = V_m cosωt
V_m = 15V