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