Page 140 - CITS - Electrician - Trade Practical

ELECTRICIAN - CITS

MODULE 11: Electronics

EXERCISE 60 : Identify different colour coding of resistors

Objectives

At the end of this exercise you shall be able to
• explain the colour code Table and letter code resistance values
• identify the colour bands, and decode the resistance value of given resistance
• calculate the tolerance value by the colour band
• measure the actual value with a multimeter and verify with calculated value.

Requirements

Tools/Equipments/Instruments Materials/Components
• Multimeter/Ohmmeter -1 No. • Various types of resistors (assorted values)
including potentiometers of carbon track and wire-
wound type and SMD -as reqd.

Procedure

TASK 1 : Write the Digit, multiplier and tolerance of each colour mentioned in Table (1)
1 Write the Digit, multiplier and tolerance of each colour mentioned in Table (1)

Table-1
Colour Digit Multiplier Tolerance (%)
Black
Brown
Red
Orange
Yellow
Green
Blue
Violet
Grey
White
Gold
Silver
(none)

No of bands Digit bands Multiplier band Tolerance band Temp. co efft band

4 1,2 3 4

5 1,2,3 4 5

6 1,2,3 4 5 6
(An informative Table for coding with varying digit bands is shown above)

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