Here's why:
* Electrons are negatively charged particles. They naturally move from areas of high electron concentration (negative charge) to areas of low electron concentration (positive charge).
* EMF is the energy per unit charge that drives this movement. It's not a literal force like gravity, but rather a potential difference that creates an electric field within the conductor.
* This electric field exerts a force on the electrons, causing them to drift in a specific direction. This flow of electrons constitutes an electric current.
Examples of EMF:
* Voltage: The potential difference across a battery or power supply is a form of EMF.
* Electromagnetic induction: When a conductor moves through a magnetic field, an EMF is induced, which can drive a current.
So, while we often talk about "voltage" pushing electrons through a conductor, it's important to understand that voltage is a manifestation of EMF, which is the fundamental force driving electron flow.
