Resistors are also called resistors, they are responsible for limiting the current flowing in the circuit. It is a linear element. Resistors can be divided due to their construction, we can distinguish carbon, metal and foil. We also divide resistors into SMD, THT and adjustable resistors - called a potentiometer. The color barcode on the resistor determines its resistance. The measure of resistance is an ohm, the higher it is, the lower the current flow. Resistance is the amount between the voltage and the strength of the electric current.