# Functions of Resistors in Electronic Circuits Explained

In an electronic circuit, the basic function of a resistor is
to limit the current to a safe value so that the associated
sophisticated parts can function properly. Read the
article to understand what is the function of a resistor,
through illustrated examples and formulas.

Introduction

Resistors come under passive electronic components
and are extensively used in electronic circuits. So
important are these components that it may be virtually
impossible to build an electronic circuit without involving
resistors. Basically the function of a resistor is always to
oppose the flow of current through it and the strength of
this opposition is termed as its resistance. German
physicist, Sir G.S. Ohms was able to discover a definite
relationship between voltage, current and resistance.
According to him a potential difference or a voltage (V)
across a resistor (R) is proportional to the instantaneous
current (I) flowing through it and is given as:
V = R.I
Here R is the constant of proportionality and is known as
the resistance of the resistor.

Function of Resistors in Electronics

In electronic circuits, resistors play an important role to limit the current and provide only the required biasing to the vital active parts like the transistors and the ICs. We will try to find out the functions of resistor in electronics. Some of which are used in transistor biasing, led current limits