RESISTOR COLOUR CODE LAB EXPERIMENT

Basic electronics lab experiment for finding resistor color code

OBJECTIVE :

The objective of this exercise is to become familiar with the measurement of the resistance values using a digital multimeter (DMM) . a second objective is to learn color code .

APPARATUS:

Required apparatus for this experiment

-Resistor

-Digital multimeter.

Theory overview :

The resistor is the most fundamental of all electrical devices, which resist to flow of electric current. The more it offers resistance in a circuit , the greater will be the opposition in current flow .Then , digital multimeter is a device that measures resistance in unpowered circuit . Resistor colour code typically consist of bands mostly four .The first and second band indicates the precision value while the third indicate power applied and fourth indicates tolerance .

PROCEDURE :

Following are steps included in procedure

1. First of all , calculate the value of a given resistor by using technique of resistor color code .
2. next , note down the values of first two color bands .
3. Then observe third band ,observe power by ten .
4. Indicate value of tolerance by uisng fourth band .
5. After that calculate resistance of given resistor .
6. Finally now calculate resistance by attaching resistor by multimeter and match values appeared on multimeter .

DIAGRAM :

CALCULATIONS ;

=10 X 100 (+,- 5% )

=1000 (+,- 5 % )

= 1000X5/100

=50

=1000(+,-) 50

=950- 1050 ohms ( value calculated by resistor )

value calculated my multimeter = 0.978 ohm

=0.978X1000 ohm

= 978ohm

=22 X 10³ (+,-) 5%

= 22000 X5/1000

= 1100 ohm ( value calculated by resistor )

by multimeter 211k kilo ohm

= 10 X 10 ¹ (+,-) 5 %

=105- 95 ohm by resistor

while by multimeter 99 kilo ohm

RESULT :

The resistance value appeared on DMM matches the value calculated by resistor color code technique .