Concept:A center-tapped transformer splits the secondary AC voltage into two equal out-of-phase halves, allowing two diodes to alternate conduction across the load.
Formula:Qualitative concept / No formula required.
Solution:- Diode \( D_1 \) conducts during the positive half-cycle while Diode \( D_2 \) is reverse biased.
- Diode \( D_2 \) conducts during the negative half-cycle while Diode \( D_1 \) is reverse biased.
- Thus, exactly 2 diodes provide full-wave rectification when paired with a center-tapped transformer.
Why other options are incorrect:- Option A: A single diode provides only half-wave rectification.
- Option B: 4 diodes are required for a full-wave bridge rectifier (which does not require a center-tapped transformer).
- Option C: 3-diode configurations are not standard single-phase rectifier designs.
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