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Resistor:

Resistor restricts the flow of electric current, for example a resistor is placed in series with a light-emitting diode (LED) to limit the current passing through the LED. A resistor is a passive two terminal electronic component that produces a voltage across its terminals that is proportional to the electric current passing through it in accordance with Ohm’s Law:

V=IR

These are made by resistance wire (made of a high resistive alloy, such as nickel chrome), various compounds and films. The power rating is 1/4W.

Resistor values – the resistor colour code:

The value of resistance is determined by color coding –

 

Color

 

Black

 

Brown

 

Red

 

Orange

 

Yellow

 

Green

 

Blue

 

Violet

 

Grey

 

White

Value

0

1

2

3

4

5

6

7

8

9

 

Tolerance- Gold ±5%

Br

Bl

Y

Silver ±10%

 Color Method:

Br- 1, Bl- 0, Y- 4                Value of Resistance is 10KΩ.