1. A single phase half controlled bridge rectifier operated from a120V 60Hz ac supply. The load current with an average value of I is continuous and negligible ripple content. If the delay angle of thyristors is 60, calculate, i) The harmonic factor of the input current ii) The displacement factor iii) The input power factor PF = Is1/Is2*cosψ What is ψ? i think that ψ=arctan(wL/R), if so what are L and R?