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What happen if diodes in full wave rectifier are reversed ?

If the diodes in a full-wave rectifier are reversed, meaning they are connected in the opposite direction compared to their intended orientation, the rectification process will not occur correctly. The consequences of reversing diodes in a full-wave rectifier include:

  1. Incomplete Rectification: Diodes in a full-wave rectifier are designed to allow current flow in one direction only, ensuring that both halves of the AC waveform are rectified. If the diodes are reversed, they will block the intended current flow, resulting in incomplete rectification. The output will still contain AC components, and the pulsating DC waveform will not be properly formed.
  2. Decreased Efficiency: Reversing the diodes disrupts the intended rectification process, leading to decreased efficiency in converting AC to DC. The rectified output will not provide a smooth and continuous DC voltage as expected, impacting the performance of the rectifier.
  3. Potential Damage: Continuous reverse biasing of diodes can lead to increased reverse voltage across the diodes. If the diodes are not designed to handle reverse voltage, this can lead to breakdown and potential damage to the diodes.
  4. Increased Ripple: The reversed diodes will allow current to flow in the wrong direction during part of the AC cycle, contributing to increased ripple in the rectified output. This results in a less stable DC voltage, which may not be suitable for many electronic applications.

In summary, reversing the diodes in a full-wave rectifier disrupts the rectification process, leading to incomplete rectification, decreased efficiency, potential damage to the diodes, and an increased ripple in the output. It’s essential to ensure the correct orientation of diodes in a rectifier circuit for proper and efficient conversion of AC to DC.

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