The carbon resistance has
normally four coloured rings or strips say A, B, C and D as shown in following
figure.
 |
| Colour Code |
Colour band A and B indicate the
first two significant figures of resistance in ohm, while the C band gives the
decimal multiplier i.e. the number of zeros that follows the two significant
figures A and B. Last band (D band) indicates the tolerance in percent about
the indicated value or in other ward it represents the percentage accuracy of
the indicated value.
The following table gives the colour code for
carbon resistance.
Initials of Colours
|
Colours
|
Figure
(A & B)
|
Multiplier (D)
|
B
|
Black
|
0
|
100
|
B
|
Brown
|
1
|
101
|
R
|
Red
|
2
|
102
|
O
|
Orange
|
3
|
103
|
Y
|
Yellow
|
4
|
104
|
G
|
Green
|
5
|
105
|
B
|
Blue
|
6
|
106
|
V
|
Violet
|
7
|
107
|
G
|
Gray
|
8
|
108
|
W
|
White
|
9
|
109
|
Colour
|
Tolerance
|
Gold
|
5%
|
Silver
|
10%
|
No-Colour
|
20%
|
Tips for Remembering
Colour Code: B.B.
ROY Gets Back Very Good
Wife.
Thus value of the above resistance is 62 x 105 +5% Ohm
