Discussion
Bridge rectifier is an alternative to :
Answer: A
The bridge rectifier is an alternative to the full wave rectifier.
Both the bridge rectifier and the centre-tapped full wave rectifier conduct on both half cycles. The bridge uses four diodes but needs no centre-tapped transformer, and each diode has to withstand only the peak voltage rather than twice the peak, so it is widely used in place of the centre-tapped circuit.
A half wave rectifier uses only one half cycle, so the bridge is an improvement on it rather than an alternative. A voltage regulator and a π-section filter come after the rectifier in a power supply and do a different job.
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