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Question

How does the peak inverse voltage requirement of a full-wave bridge rectifier compare to that of a center-tapped full-wave rectifier for a given transformer secondary voltage?

This question was previously asked in
RRB Technician 2026 Grade 3 Question Paper (7-Oct-2026) (Shift 3)
The correct answer is

The bridge rectifier requires a lower PIV rating per diode

Let Vm be the peak voltage delivered to the load in each case.

Center-tapped rectifier: when one diode conducts, the reverse-biased diode sees the full secondary voltage (both halves), so \(\text{PIV} = 2V_m\).

Bridge rectifier: two diodes conduct in series while the other two are reverse-biased in parallel across the secondary, so each sees only \(\text{PIV} = V_m\).

So for the same output, each bridge diode needs only half the PIV rating — a key advantage of the bridge circuit, besides needing no center tap. Every rectifier diode still needs some PIV rating, and the two circuits do not need the same rating.

Hence, the answer is The bridge rectifier requires a lower PIV rating per diode.

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Similar Questions

  1. For a rectifier circuit, the form factor (Kf) is reduced while all other operating conditions remain unchanged. What is the effect on the ripple factor?

  2. If the forward voltage drop of each conducting diode is Vf, which expression gives the peak output voltage of a full-wave bridge rectifier in terms of the input peak voltage of the transformer secondary Vp(in)?

  3. A center-tapped full-wave rectifier has a transformer secondary voltage of 200 VRMS per half winding. Which of the following minimum diode Peak Inverse Voltage (PIV) ratings should be selected for reliable operation?


Important Questions from Diodes and Its Applications

  1. Which of the following statements is FALSE about LED lamps?

  2. A Zener diode is used in _______ for voltage regulation.

  3. Which of the following diodes can be used as Voltage Regulator if used in reverse bias?

  4. What is it called when a diode exceeds the reverse voltage and then it fails and passes more current in the reverse direction?

  5. Determine the resonant frequency of an IMPATT diode having the following specifications:

    Carrier drift velocity: 2 × 107 cm/s

    Drift-region length: 5 μm

    Maximum operating voltage: 100 V

    Maximum operating current: 250 mA

    Efficiency: 20%

    Breakdown voltage: 90 V

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