A 0.4-kΩ resistor and 401-mH inductor are connected in series to a Vᵣₘₛ = 120 V AC power source oscillating at a frequency of f = 60 Hz. The voltage as a function of time is given by
V = V₀cos(ωt)
Where V₀ is the amplitude, ω is the angular frequency.
a) What is the amplitude of the source voltage, in volts?