Pdf of all viva qn and ans for all experiments

A Half wave rectifier is a device which converts ac voltage to pulsating dc voltage using one PN junction diode.The ac voltage (230 V, 50 HZ) is connected to the primary of the transformer. The transformer steps down the ac voltage. Thus, with suitable turns ratio we get desired ac secondary voltage. The rectifier circuit converts this ac voltage in to a pulsating dc voltage. Half wave rectifier conducts during positive half cycle and gives output in the form of positive sinusoidal pulses. Hence the output is called pulsating dc. A pulsating dc voltage containing large varying component called ripple in it. The capacitor filter is used after rectifier circuit, which reduces the ripple content in the pulsating dc. Thus filter converts pulsating dc in to pure dc.