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For a center-tapped full-wave rectifier with each half-secondary having peak voltage Vm, the approximate PIV rating required for each diode is?

AVm/2
BVm
C2Vm
D4Vm

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Correct Answer: C. 2Vm

Explanation: When one diode conducts, the other can see approximately twice the peak voltage of one half-secondary, so PIV≈2Vm.

Reference: Standard electronics: center-tapped rectifier PIV

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