Concept:There are two primary ways to achieve full-wave rectification: Center-tapped (\( 2 \) diodes) and Bridge (\( 4 \) diodes). Without specifying "center-tapped", the industry standard topology is the bridge rectifier.
Solution:- A Full Wave Bridge Rectifier does not require an expensive center-tapped transformer.
- It utilizes an arrangement of exactly \( 4 \) diodes configured in a bridge loop.
- During the positive half cycle, two diodes conduct. During the negative half cycle, the other two conduct.
- for this specific NUMS question, \( 4 \) is the expected answer.
Why other options are incorrect:- \( 1 \): Makes a half-wave rectifier.
- \( 2 \): Valid only if a "center-tapped transformer" is explicitly mentioned.
- \( 3 \): Not a functional rectifier configuration.
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