What do the color codes on resistors indicate?

The color codes on resistors are a standardized way of indicating the resistance values of the resistor. Each color corresponds to a specific numerical value, and the arrangement of these colors conveys both the significant digits of the resistance and the multiplier that determines the final resistance value in ohms.

For instance, the first two colors represent the first two significant digits, the third color indicates the power of ten (the multiplier), and sometimes a fourth color reflects the tolerance of the resistor. This system allows for quick identification of a resistor’s resistance value without needing to measure it with a multimeter, making it an essential aspect of electronics and electrical engineering.

The other potential options do not align with the purpose of the resistor color code. The type of material, maximum voltage rating, and age of the resistor are not indicated by these color bands, which specifically focus on resistance values.