The colour code for a resistance is R=22Ω±5% We may write it as, R=22×100+5%Ω In carbon colour coding resistors have two bands for the resistance value, one multiplier and one tolerance 3 band. In multiplier band, from the left first colour shows first significant number, second colour shows second significanı number and third colour is for multiplier of 10 . By using the colour code chart, we find that 2 stands for red and 0 for black. 5% tolerance means resistor has golden band. So, colour coding for resistor from left should be red-red-black-gold