Resistor Colour Code - Colour Chart, FAQs

Edited By Team Careers360 | Updated on Nov 12, 2024 10:19 PM IST

In this article we are going to learn about resistor color codes ,resistance band , resistance value ,resistance band color code ,resistor color coding formula and examine the color code chart.

Resistor colour code :

In the electrical experiments resistances starting from about 0.1 ohm to 1000 ohm are widely used .These types of resistances are generally made of copper or any other conducting metal or alloys .Usually in electronics goods resistances are less than 1000 ohm. Nowadays , high resistances graphite and gas carbon are used widely .These resistors are known as carbon resistor. The allotropes of carbon are thousand times greater than metals .Carbon is very effective as an element of high resistance .The carbon resistors are cheaper than metal resistors.

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Resistor colour code :
Resistance Colour code chart :
Reading of a resistor color code :

Resistor Colour Code - Colour Chart, FAQs

Color code of carbon resistor

A cylindrical shell of bad conductor is used to made carbon resistor .The value of resistance can be determined by calculating the color codes drawn on the resistance .Two conducting metal wires are taken out from either side of the shell along its axis through which the resistor is connected to the external circuit .The fourth color is drawn apart from the three consecutive colors .From the above diagram we can see that the yellow color is apart from the two red and brown color .From the colors of the resistor we can calculate the resistance of the resistor .

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Resistance Colour code chart :

Resistance colour code chart or resistor color code calculator are used to calculate the resistance and tolerance values of resistors.

There are 10 signal digits from 0 to 9 which corresponds to 10 colors.

Resistance Colour code chart

As shown in the table, different colours represent different values in the resistor colour code. The gold colour code is the multiplier to the resistance value. Black colour code is 0, brown colour code is 1, red colour code is 2, orange colour code is 3, yellow colour code is 4, green colour code is 5 and so on. It is the resistor color code calculator

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Reading of a resistor color code :

According to the given diagram of the resistor

Red blue violet gold

For red and blue we will put the values of the digit , for violet we will write multiplier and for gold we will write tolerance.

Red colour code is 2

For blue digit is 6

For violet digit is 7 so the multiplier is 10⁷

For gold the tolerance is ±5%

So the resistance of the given resistor Red blue violet gold will be (26×10⁷) ±5% Ω

How to remember the sequence of the color code :

To remember the color code sequence of color code given above by the sentence given below,

B B ROY of Great Britain has a Very Good Wife wearing Gold and Silver necklace.

Tolerance:

Tolerance is the product of the value of the resistor and the tolerance band value .

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Frequently Asked Questions (FAQs)

1. Who invented resistor color code?

Radio Manufacturers Association (RMA) invented resistor colour code.

2. When the resistor colour code was invented?

In the 1920s the resistor colour code was invented.

3. Why resistors are colour coded?

Resistors are small. In such a small space, it is hard to write the values of the resistors so resistors are colour-coded.

4. What is the 100-ohm resistor colour code?

Brown, Black and brown and gold (as tolerance factor) will be the resistor code of 100 Ω.

5. Why carbon resistors are most commonly used than metal resistors?

Carbon resistors are used most commonly than metal resistors because they are cheaper than metal resistors. Also, they are smaller in size so carbon resistor colour codes can be easily analyzed.

6. Write about wire colour code India.

As reported by wire colour code India, the red colour signifies live power, the black colour indicates neutral and the green colour shows the earthing.