Resist is the word that means “to oppose”. Resistance is the property of opposing the flow of electrons, in a conductor or a semiconductor. A Resistor is an electronic component that has the property of resistance.

The unit of resistance is Ohms, which is indicated by Ω omega. The formula for resistance is

R = V/I

Where V is Voltage and I is Current.

A process called **color coding** is used to determine the value of resistance for a resistor, just as shown in the above figure. A resistor is coated with four color bands where each color determines a particular value. values that each color indicates.

The first two colored bands indicate the first and second digit of the value and the third color band represents the multiplier (number of zeroes added). The fourth color band indicates the tolerance value. The five-color band resistors are manufactured with a tolerance of 2% and 1% and also for other high accuracy resistors. In these five band resistors, the first three bands represent digits, the fourth one indicates multiplier and the fifth represents tolerance.

Tolerance is the range of value up to which a resistor can withstand without getting destroyed. This is an important factor. The following figure shows how the value of a resistor is determined by color code.