What will happen if the diodes in a full wave rectifier are reversed?

Reversing the diodes in a full wave rectifier will result in a failure of the circuit. A full wave rectifier depends on the diodes being correctly oriented to allow current to flow in one direction during both halves of the AC waveform. When the diodes are reversed, they will block the current flow instead of allowing it to pass through, leading to no output voltage or a malfunction of the rectifier circuit. This is fundamental to rectifier operation, as proper orientation ensures that the AC signal is converted to a DC signal effectively. Without the correct orientation, the essential function of the rectifier cannot be achieved, which is why this choice is the most accurate description of the consequences of reversing the diodes.