GATE 2025 Power Electronics Foundation Quiz 55

A battery is charged by a single-phase half wave diode rectifier. The supply voltage is 100 V(rms), 50 Hz and the battery emf is constant at 50 V. If the diode has voltage drop of 2 V during its conduction, then PIV rating of the diode should be

A 120V, 50Hz ac voltage is applied to the primary of 5:1 step up transformer whose secondary is centre tapped allowing a load of 1KΩ to be connected for a full wave rectification using two diodes. The lowest value of ripple frequency in Hz ?

If the converter shown below is triggered at , then rectification efficiency is

In a single-phase mid-point SCR converter load current is constant at 10A, when the firing angle is 20°. Turns ratio (secondary to primary)is 2.5 for input transformer and voltage supply is 240V, 50 Hz. The input power factor is