What Does an AC Generator Produce? Current or Voltage? Well, It's EMF!

This might seem like a simple question, but it's actually quite insightful. The short answer: A generator is a source of EMF. But what exactly is EMF?

EMF stands for Electromotive Force. It's the force that creates a potential difference in a circuit by influencing the movement of electrons (charges) within the generator's coil.

Think of it as the "pressure" that drives the flow of electrons, similar to how pressure in a water tank drives water through a pipe when the tap is opened. A battery is also a source of EMF.

EMF is what induces a voltage in the circuit. When a voltage is induced in the generator's coils, it creates a tendency for electrons to move.

However, current doesn't flow until we connect a load to the circuit, and water doesn't flow until you open the tap.

Key Points

EMF (Electromotive Force): It is the force that causes electrons to move, creating a potential difference (voltage) in a circuit.

Voltage vs. Current: Voltage is the potential difference created by the EMF, while current is the actual flow of electrons that occurs when a circuit is completed (when a load is connected).