Explain the properties of Fourier transform.
The input voltage in volts to a series R-L circuit is e(t) =180 sin (314t+100) +56 sin (942t + 350) + 18. The values of r and L are 18 and 0.0413H. Determine
(i)Expression of current
(ii) the rms value of voltage and current.
(iii) the power factor of the circuit