Colour code of resistors, Physics

Colour code of resistors:

The current method of colour code marking of resistors is the Band System.

1643_color code.png

Close to one end of the resistor are four coloured bands (there may appear to be only three, in this case the forth band is 'no colour' - see diagram below).  They are known as bands 1 - 4.  Bands 1 and 2 give the first two numbers of the resistor value, band 3 gives the multiplication factor, i.e. the number of zeros, the fourth band gives the tolerance, which indicates how close the actual value may be to the stated value.

Colour

First band

(or body)

First figure

Second band

(or tip)

Second figure

Third band

(or spot)

Multiply by

Fourth band

Tolerance

Black

0

0

1

-

Brown

1

1

10

+1%

Red

2

2

100

+ 2%

Orange

3

3

1000

-

Yellow

4

4

10,000

-

Green

5

5

100,000

+ 0.5%

Blue

6

6

1,000,000

+ 0.25%

Violet

7

7

10,000,000

+ 0.1%

Grey

8

8

-

-

White

9

9

-

-

Gold

-

-

0.1

+  5%

Silver

-

-

0.01

+ 10%

No colour

-

-

-

+ 20%

Certain resistors remain very close to their stated value, despite temperature changes.  These are called 'high stability' resistors and this is shown by a fifth band coloured 'pink'.

 

 

 

Posted Date: 9/13/2012 3:07:04 AM | Location : United States







Related Discussions:- Colour code of resistors, Assignment Help, Ask Question on Colour code of resistors, Get Answer, Expert's Help, Colour code of resistors Discussions

Write discussion on Colour code of resistors
Your posts are moderated
Related Questions
when a billard ball hits another billarid ball then other ball is maving but striking ball also move some distance why

The vapour pressure of a substance at  20.0 o C is 38.1  kPa and its enthalpy of vaporisation is 49.6  kJ mol -1 . Estimate the temperature at which its vapour pressure is 80.0 k

NEWTON'S FIRST LAW OF MOTION: This law states that "A body at rest will remain at rest and a body moving with uniform velocity will carry on doing so, until acted on by some un

Does upthrust change in different liquids (examples please)


Specified the expression below valid for points in the x-y plane what is the y-component of the electric field valid for points on the y-axis?

Give one advantage of a scanning electron microscope over a transmission electron microscope? The SEM has become more popular than the TEM as it can make images of high resolut

A boat can travel at a speed of 3 m s -1 on still water. A boatman needs to cross a river whilst covering the shortest possible distance. In what direction should he row with resp

Resolution of Forces: This topic is important, but is really the opposite to Addition of forces. Recalling that two forces can be added to give a single force known

Illustrate the current-voltage (I-V) characteristic curves if a junction diode in reverse and forward bias.