https://foxoyo.com/mcq/127424/assertion-a-a-half-wave-controlled-rectifier-has-poorer-efficiency-and-higher-ripple-factor-than-a-full-wave-controlled-rectifier-reason-r-the-use-of-a-freewheeling-diode-in-half-wave-controlled-rectifier-circuit-improves-the-waveform-of-load-current-and-circuit-power-factor