The diode is a semiconductor device that allows the current to flow in one direction only. It has two electrodes called anode or plate and cathode, it uses the rectifying properties of the union between type P and N materials of a semiconductor. This symbols can be represented inside a circle.
The electrical currents are movements of electric charges (electrons) through a conductor. The electrical current can be current driving or AC/DC convention. His unit is the ampere and is measured by the ammeter. Every electrical current produces an electric field.
Las antenas son dispositivos ( hilo, varilla, parábola... ) destinados a interceptar las ondas de radio o emitirlas transformando los campos electromagnéticos en señales eléctricas o viceversa.
