Translations:Electricity and energy/13/en

Electricity is almost always invisible, but flowing water enables us to create good comparisons and make the concept understandable. A circuit with a battery - like in the previous graphic - operates at a certain voltage and current, similarly a basic hydraulic system operates with a certain pressure and volume.

• The voltage in the electrical circuit is similar to the pressure in the hydraulic system.
• The current in the electrical circuit is similar to the flow in the hydraulic system.
• The wires in the electrical circuit and the load create resistance. The pipes and sprinkler in the final graphic also create friction.