Discussion
What is the peak inverse voltage in a bridge rectifier?
Answer: C
Each diode in a bridge stands off only the secondary's peak, because the two non-conducting diodes share the reverse voltage rather than one taking it all. That halving of the requirement, together with the absence of a centre tap, is why the bridge is the standard choice despite needing four diodes instead of two. Counting devices is a poor guide to cost when the ratings differ by a factor of two. The shared properties explain why these schemes form a family, and the differences explain why more than one exists.
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