Concept:A bridge rectifier operates by conducting through diagonally opposite pairs of diodes in each half-cycle.
Formula:Qualitative concept / No formula required.
Solution:- During the positive half-cycle, diodes \( D_1 \) and \( D_3 \) are forward biased and conduct in series with the load resistor.
- During the negative half-cycle, diodes \( D_2 \) and \( D_4 \) conduct in series with the load resistor.
- Thus, exactly 2 diodes conduct simultaneously at any given time.
Why other options are incorrect:- Option A: Single-diode conduction occurs only in half-wave rectifiers.
- Option B: All 4 diodes cannot conduct at the same time without short-circuiting the transformer secondary.
- Option C: Three diodes never conduct simultaneously in a balanced bridge.
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