What do the clolour bands on a resistor mean?

Answer 1

color coding makes easy to find the resistance of a given resistor..

coding contains colors like

0--Black

1--Brown

2--Red

3--Orange

4--Yellow

5--Green

6--Blue

7--Violet

8--Grey

8--White

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---How to calculate?--

Ans: now if color code is Red-red-green-gold then

resistance= 22x10^5 Ohm and tolerance is +-5%

It is sometimes not obvious whether a color coded component is a resistor, capacitor, or inductor, and this may be deduced by knowledge of its circuit function, physical shape or by measurement. Resistor values are always coded in ohms (symbol Ω), capacitors in picofarads (pF), and inductors in microhenries (µH).

One decade of the E12 series (there are twelve preferred values per decade of values) shown with their electronic color codes on resistors.

A 100 kΩ, 5% through-hole resistor.

A 0Ω resistor, marked with a single black band.

To distinguish left from right there is a gap between the C and D bands. * band A is first significant figure of component value (left side) * band B is the second significant figure * band C is the decimal multiplier * band D if present, indicates tolerance of value in percent (no color means 20%)

For example, a resistor with bands of yellow, violet, red, and gold will have first digit 4 (yellow in table below), second digit 7 (violet), followed by 2 (red) zeros: 4,700 ohms. Gold signifies that the tolerance is ±5%, so the real resistance could lie anywhere between 4,465 and 4,935 ohms.

Resistors manufactured for military use may also include a fifth band which indicates component failure rate (reliability); refer to MIL-HDBK-199 for further details.

Tight tolerance resistors may have three bands for significant figures rather than two, and/or an additional band indicating temperature coefficient, in units of ppm/K.

All coded components will have at least two value bands and a multiplier; other bands are optional (italicised below).

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Answer 2

The colored bands on resistors are a code to calculate the value of the resistor.

The purpose is to simplify the reading of values.

Have a look at related question for an explanation of this.

Answer 3

The colors on a resister indicate the amount of electrical resistance measured in OHMS the device affords.

Answer 4

A; Provide value and tolerance information at a glance

Answer 5

Coloured bands on resistors indicate their value and tolerance rate.