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# What is a parallel circuit?

We explain what a parallel circuit is and the formulas it uses. In addition, some examples and what is a series circuit.

1. ### What is a parallel circuit?

When we talk about a  parallel circuit  or a parallel connection, we mean a connection of electrical devices (such as coils, generators, resistors, capacitors, etc.) placed in such a way that both the input terminals or terminals of each one, Like their output terminals, they match each other.

The parallel circuit is the model used in the electrical network of all homes , so that all loads have the same voltage . If we understand it using the metaphor of a water pipe, we would have two liquid tanks that are filled simultaneously from a common inlet, and emptied in the same way by a shared drain.

This type of circuit allows repair of any connection or device without affecting others, and also maintains the same exact voltage between all devices , although the more devices are more current, the electrical source must generate. In addition, the resistance obtained in this way is less than the sum of the resistors of the complete circuit: the more receivers, the less resistance.

The great advantage of parallel circuits is that: the independence of each station in the network, whose possible failure would not alter at all the potential difference at the ends of the circuit. This is its main difference in use with series circuits.

1. ### Formulas of a parallel circuit

The total values ​​of a parallel circuit are obtained by simple addition. The formulas for this are the following:

• Intensity : It = I1 + I2 + I3… + In
• Resistors : 1 / RT = 1 / R1 + 1 / R2 + 1 / R3… + 1 / Rn
• Capacitors : Ct = C1 + C2 + C3 … + Cn