Based on the understanding operations of rectifies answer the questions Diodes can be used for rectifying on ac voltage (restricting the ac voltage to one direction) with the help of a capacitor or a suitable filter, a dc voltage ca be obtained.

In a full wave rectifier using a 100 secondary turns centre tapped transformer and two diodes, the tapping is erroneously done over turn no. 30 as shown. The output voltage waveform will be as :

The correct answer is option (3) :

As tapping in transformer is not in centre, the ratios of number of turms is 70:30 therefore output have different magnitude (in ratio 70:30) in positive and negative cycles.