Colour code of carbon resistors|Electricity

(9) Colour code of carbon resistors

  • Commercially resistors of different type and values are avilable in the market but in electronic circuits carbon resistors are more frequently used
  • In carbon resistors value of resistance is indicated by four coloured bands marked on its surface as shown below in figure

    Colour code of carbon resistors|Electricity

  • The first three bands a,b.c determine the value of the resistance and fourth band d gives the tolerance of the resistance
  • The colour of the first and second band respectively gives the first and second significant figure of the resistance and third band c gives the power of the ten by which two significant digits are multiplied for obtainng the value of the resistance
  • value of different colurs for making bands in carbon resistors are given below in the table

    Colur Figure(first and second band) Multiplier(for third band) tolerance
    Black 0 1 -
    Brown 1 10 -
    Red 2 102 -
    Orange 3 103 -
    Yellow 4 104 -
    Green 5 105 -
    Blue 6 106 -
    Violet 7 107 -
    Gray 8 108 -
    white 9 109 -
    Gold - 10-1 5%
    Silver - 10-2 10%
    no Colour - - 20%

  • For example in a given resistor let first strip be brown ,second strip be red and third be orange and fourth be gold then resitance of the resitor would be
    12X 103 +/- 5%

Note to our visitors :-

Thanks for visiting our website. From feedback of our visitors we came to know that sometimes you are not able to see the answers given under "Answers" tab below questions. This might happen sometimes as we use javascript there. So you can view answers where they are available by reloding the page and letting it reload properly by waiting few more seconds before clicking the button.
We really do hope that this resolve the issue. If you still hare facing problems then feel free to contact us using feedback button or contact us directly by sending is an email at [email protected]
We are aware that our users want answers to all the questions in the website. Since ours is more or less a one man army we are working towards providing answers to questions available at our website.