Types of current.

DIRECT CURRENT.

Is a direct current when the electros always flow in the same direction with the same current. The value doesnt change over time.

ALTERNATING CURRENT.

In alternating current the value changes 50 times per second and the electrons can go in differents directions. An example is a electrical socket.

➦First, the current is in 0 V and increases to 325 V.
➦Then, the current decreases from 325 V to 0 V.
➦After, the current still decreasing from 0 V to -325 V.
➦Finally, the current increases to 0 V.

This process is repeated 50 times every second. Each variation is an electric signal and is an alternating signal when it alternates between positive and negative values.

THE EFFICIENCY OF ALTERNATING CURRENT.

The average power of alternating current is the power that a direct current should have in order to produce the same electrical effect.

TRASFORMERS.

Alternating current can be increased or decreased by a transformer. Transformers are two windins made of copper wire. The value that we have produce in one of them depend on the number of times that the copper wire has been wrapped around each winding: V1/V2= n1/n2