How do you find value of resitor?

Answer 1

In a Resister u can find totally FORE colored rings.The First three rings used to calculate the value of the resister while the fourth ring indicates the tolerance.

Let i say an example how to calculate the value of a resister.

there are 10 colors commonly using in resister.Each color indicates a value.

let me say it.

Black-0

Brown-1

Red-2

Orange-3

Yellow-4

Green-5

Blue-6

Violet-7

Grey-8

White-9

A residter has

1.Yellow

2.Violet

3.Brown

4.Gold

So yellow value is 4,Violet value is 7,Brown value is 1

So 47(Yellow)(Violet)*10^1(Brown) =470 Ohm and gold indicates +/- 5% tolerance. That is min value of that resistor is 446.5 Ohh and max value of that resistor is493.5 Ohm.

Note: Most of the resistor have Four rings only. But aso there are resistors available with 5 rings