The electrical circuit

An electrical is a closed path where electric current flows. In order to have a current , we need an energy , like a battery. This element provides a voltage or . Depending on the electrical of the different circuit components, the current intensity can be high or low. The Ohm's allows us to calculate the if we know the current intensity and the resistence: V = I x R.

The devices that transform electrical energy into another kind of energy are called . There are four categories: , that produce motion; , that emit light; or bells, producing sound and , that produce heat.

To allow the current to flow we can push a .