Here is the full description of the color coding for a 100 Ω (ohm), 1/4 Watt resistor in a simple and clear way:
100 Ω Resistor – 1/4 Watt
Standard Description (4 Band Type)
Color Bands:
Brown – Black – Brown – Gold
Tolerance ±5% → actual value can be 95 Ω to 105 Ω
Power Rating Description
1/4 Watt (0.25 W) means:
The resistor can safely dissipate 0.25 watts of heat
Used in low-power electronic circuits
Typical physical size: about 6 mm long
What This Resistor Is Used For
A 100 Ω, 1/4 W resistor is commonly used for:
Current limiting (LED circuits)
it is a precision resistor:
Brown – Black – Black – Black – Brown
= 100 Ω ±1%
Component: Fixed Resistor
Resistance: 100 Ohms (Ω)
Power Rating: 0.25 W (1/4 Watt)
Tolerance: ±5% (Gold)
Type: Carbon film / Metal film
Temperature Coefficient: ±100 to 200