Concept:Bridge rectifiers work with standard two-terminal secondary transformers and subject non-conducting diodes to only \( \text{PIV} = V_m \), compared to \( 2V_m \) in center-tapped designs.
Formula:$$\text{PIV}_{\text{bridge}} = V_m = \frac{1}{2} \text{PIV}_{\text{center-tapped}}$$
Solution:- Center-tapped transformers are bulkier, more expensive, and require a precise center tap connection.
- In a bridge rectifier, four diodes work with standard transformers and each diode only needs to withstand \( V_m \) in reverse bias, lowering component costs.
Why other options are incorrect:- Option A: Passive rectifiers cannot produce a DC voltage higher than the input peak voltage.
- Option C: All unfiltered rectifiers produce pulsating DC output with ripple that requires filtering.
- Option D: A bridge rectifier uses four diodes, not one.
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