Parallel and series connections

Here, I will explain how the resistors could be connected and how much is the total resistance of a circuit.

There are two types of connections:

 - In series:

       You could calculate how much is the  total resistance of a circuit with the resistors connected in series    with this formula:

 - In parallel:

       You could calculate how much is the  total resistance of a circuit with the resistors connected in parallel       with this formula: