How do you read a resistor color code?

Steps
  1. Position the resistor with the gold or silver color band to the right..
  2. Read the color sequence that must be decoded to determine resistance.
  3. Determine the coded number for the resistive value.
  4. Determine the tolerance of the resistor.
  5. Determine the decoded number for the resistive value.
A.

What are the colors of resistors?

Components and wires are coded with colors to identify their value and function. The colors brown, red, green, blue, and violet are used as tolerance codes on 5-band resistors only. All 5-band resistors use a colored tolerance band.
  • What color is a 10k resistor?

    10k / 10k ohm Resistor Colour Code
    Value10 kΩ
    Type4 Band Colour Code
    Colour CodeBrown, Black, Orange, Gold
    MultiplierOrange, 1000
    ToleranceGold Band ±5%
  • Why is there a difference between the measured value and the nominal value of the resistors?

    The actual (measured) resistance will vary from the nominal value due to subtle mechanical and chemical differences that occur during manufacturing. The manufacturer specifies the maximum deviation from the nominal value as a ±percentage. This range of deviation is called the tolerance of the resistor family.
  • What is a resistor made up of?

    Resistor composition. Resistors can be constructed out of a variety of materials. Most common, modern resistors are made out of either a carbon, metal, or metal-oxide film. In these resistors, a thin film of conductive (though still resistive) material is wrapped in a helix around and covered by an insulating material.
B.

What is a resistor color code?

An electronic color code is used to indicate the values or ratings of electronic components, usually for resistors, but also for capacitors, inductors, diodes and others. A separate code, the 25-pair color code, is used to identify wires in some telecommunications cables.
  • How do you check a resistor with a multimeter?

    Steps
    1. Remove power from the circuit containing the resistor.
    2. Isolate the resistor from the circuit.
    3. Inspect the resistor.
    4. Read the resistor value visually.
    5. Prepare a digital multimeter (DMM) to measure the resistor.
    6. Measure the resistance.
    7. Determine the actual resistance of the resistor.
  • What is the color code for a 4.7 K resistor?

    4k7 / 4.7k ohm Resistor Colour Code
    Value4.7 kΩ / 4700 Ω
    Type4 Band Colour Code
    Colour CodeYellow, Violet, Red, Gold
    MultiplierRed, 100
    ToleranceGold Band ±5%
  • How can we calculate tolerance value of resistors?

    The tolerance band is silver, so we multiply our resistance by 0.1. This means that our resistor's value can be as high as 16.5 Ω or as low as 13.5 Ω. For the third resistor, we'll perform the calculation in an alternative way. Take the nominal value and multiply it by 1 + your tolerance, which is (1+0.1).
C.

How can we calculate tolerance value of resistors?

The tolerance band is silver, so we multiply our resistance by 0.1. This means that our resistor's value can be as high as 16.5 Ω or as low as 13.5 Ω. For the third resistor, we'll perform the calculation in an alternative way. Take the nominal value and multiply it by 1 + your tolerance, which is (1+0.1).
  • What are the colors of resistors?

    Components and wires are coded with colors to identify their value and function. The colors brown, red, green, blue, and violet are used as tolerance codes on 5-band resistors only. All 5-band resistors use a colored tolerance band.
  • How does a resistor work?

    Devices called resistors let us introduce precisely controlled amounts of resistance into electrical circuits. Photo: Four typical resistors sitting side by side in an electronic circuit. A resistor works by converting electrical energy into heat, which is dissipated into the air.
  • What is the use of a carbon resistor?

    Carbon Resistors. The most common type for electronics use is the carbon resistor. They are made in different physical sizes with power dissipation limits commonly from 1 watt down to 1/8 watt. The resistance value and tolerance can be determined from the standard resistor color code.

Updated: 29th September 2018

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