Practice over 1000+ GATE-level questions from this topic!
Designed to match the latest GATE pattern with topic-wise precision, difficulty tagging, and detailed solutions.
The chopper circuit shown in figure (i) feeds power to a 5 A DC constant current source. The switching frequency of the chopper is 
. All the components can be assumed to be ideal. The gate signals of switches 
and 
are shown in figure (ii). Average voltage across the 5 A current source is
Fig. (i)
Fig. (ii)
10 V
6 V
12 V
20 V
Since the load is a constant current source only devices S1 & D2 can conduct based on current direction.
When S1 is ON
V0=20 V
When S1 is off D2 turns ON
V0=0
Based on switching signal waveform
S1 conducts from 0 to 3μs V0 = 20
D2 conducts from 3μs to 10μs V0 = 0
∴ average output voltage 
V0 (avg) = 6 volt