An electric motor uses electromagnetism to convert electrical energy into mechanical energy (rotational motion). Here's how it works:

1. Electromagnets: The motor contains electromagnets, which are coils of wire that produce a magnetic field when electricity flows through them.

2. Magnetic Interaction: The electromagnets interact with a permanent magnet (or another electromagnet) to create a force.

3. Rotation: The force from the magnetic interaction causes a shaft with a rotor attached to it to rotate. This rotation is the mechanical energy output of the motor.

Here's a simple analogy:

Imagine a compass needle. It points north because it's attracted to Earth's magnetic field. Now imagine you have a bar magnet. You can move the compass needle by bringing the bar magnet near it. The magnetic force from the bar magnet will cause the compass needle to rotate.

An electric motor works similarly. It uses electromagnets to create a magnetic field that interacts with a permanent magnet or another electromagnet, causing a shaft to rotate. The strength and direction of the magnetic field can be controlled by changing the current flowing through the electromagnets, allowing for precise control over the motor's speed and direction.