What type of current is generated by alternators?

Alternators are devices that convert mechanical energy into electrical energy using electromagnetic induction. They produce alternating current (AC), which means the flow of electric charge periodically reverses direction. This occurs because the magnetic field within an alternator rotates, causing the generated voltage to alternate in polarity, resulting in current that flows back and forth.

In practical applications, alternating current is preferred in power generation and electrical systems because it can be transmitted over long distances with reduced energy loss compared to direct current (DC). The use of transformers to step up or step down voltage makes AC suitable for high-voltage transmission.

Understanding the operation of alternators is crucial, as it illustrates the principles of electromagnetic induction and the nature of alternating current in electric circuits.