Discussion
Identify the circuit shown below:
Answer: C
The circuit shown is an uncontrolled bridge rectifier. It has four diodes in a bridge, two conducting in each half cycle of the supply, so the load gets a direct voltage from both half cycles of the alternating supply.
A half wave rectifier has one diode, and a centre-tapped full wave rectifier needs two diodes and a transformer with a tapped secondary. A controlled bridge would use thyristors in place of diodes. The picture has only diodes, so the third option is correct.
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