color coded resistor ppt

1. What do you notice about the
picture?

2. Why people use different color of
hard hats on construction sites?

3. Resistor
Color
Coding

4. Cognitive Objective: Students will be
able to read and interpret the resistance
values of color-coded resistors accurately.
Psychomotor Objective: Students will
practice decoding resistor values through
hands-on activities involving color-coded
resistors.
Affective Objective: Students will gain
confidence in their ability to read and
interpret the color-coded bands on
resistors.

5. What is a
resistor?
A circuit component
that resist (limits) the
flow of electron in an
electrical circuit

6. Resistor Color Codes
 1st band = 1st significant digit
 2nd band = 2nd significant digit
 3rd band = multiplier
 4th band = tolerance

7. Resistor Color Codes
Black
Bananas
Really
Offend
Your
Girlfriend
But
Violets
Get
Welcomed
Get
Some
Now

8. Group Activity
Each group will be given actual
resistors, and they will identify its
corresponding value.

9. Resistor Color Codes

10. Resistor Color Codes

11. Resistor Color Codes
Therefore:
25 x 1 = 25
25 ohms ± 10%
Therefore:
39 x 10,000 = 390,000
390 kΩ ± 10%

12. Tolerance
390 kΩ +/- 10% 25 Ω +/- 10%
Minimum Value:
351,000 Ω
Maximum Value:
429,000 Ω

13. Why do we use
color coding in
a resistor?
For easier
identification

14. Why does a
resistor have a
tolerance?
 There is no perfect
resistor with an
exact value
 Resistors are
manufactured in
approximated values

15. Assessment

16. Fill the color codes for the following resistors
Value 1st Band 2nd Band 3rd Band 4th Band
39 MΩ ± 5%
680 Ω ± 10%
47 Ω ± 10%
66 Ω ± 5%
8.2 kΩ ± 5%

18. Fill the color codes for the following resistors
Value 1st Band 2nd Band 3rd Band 4th Band
39 MΩ ± 5% Orange White Blue Gold
680 Ω ± 10% Blue Grey Brown Silver
47 Ω ± 10% Yellow Violet Black Silver
66 Ω ± 5% Blue Blue Black Gold
8.2 kΩ ± 5% Grey Red Red Gold