Types of circuit

Series circuit

        Two or more elements form a series circuit when the output of one element provides the input for the next element.

    In the following diagram, the same current flows through all the elements, and the voltage is the sum of the tensions at the end of each element.

        

To calculate the total resistance of a circuit, we add the resistance values of each load:

R=R1+R2+R3...

Parallel circuit

 In a parallel circuit, tha various components share the same input and output. The equivalent resistance of this type of circuit would be:

1/R= 1/R1+1/R2+1/R3+...

If you put more batteries the intensity is the same

Combination circuit

  A combination circuit has some elements connected in series an other in parallel.

In this type of circuit, the current remains constant  between elements that are connected in series.