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A rectifier’s primary function is to convert alternating current (AC) into direct current (DC). This process is crucial in various applications where DC is required, such as in powering electronic devices, charging batteries, and providing a stable voltage supply for sensitive circuits.

In an AC supply, the current changes direction periodically, while DC maintains a constant direction. Rectifiers achieve this conversion by allowing current to flow only in one direction, effectively filtering out the negative part of the AC waveform. This is typically done using diodes, which are semiconductor devices that conduct current in one direction while blocking it in the opposite direction.

The role of a rectifier is fundamental in power electronics, as it allows the utilization of AC power sources for DC-driven devices, ensuring that the electronic components receive the appropriate type of current for optimal operation.

Understanding this function is essential for electricians and engineers who work with various electrical systems, ensuring proper components are utilized for desired applications.