In resistor color coding, which statement is true?

In resistor color coding, which statement is true?

• A. Color bands indicate value, tolerance, and sometimes quality.
• B. Color bands indicate value and tolerance.
• C. Color bands indicate voltage.
• D. Color bands indicate temperature.

Answer: (A)

Color bands on resistors encode the numeric value and the precision of that value. The bands give you the significant digits and a multiplier to determine the resistance, while a separate band (usually the last one) shows the tolerance—how close the actual resistance is to the stated value. On many resistors you’ll see four bands: two digits, a multiplier, and a tolerance. Some higher-precision types add an extra band that indicates a temperature coefficient (how the resistance changes with temperature) or other reliability information. So this statement is true because the bands mainly convey value and tolerance, with the possibility of an additional spec in certain cases. Voltage isn’t represented by the color bands, and temperature is not shown directly unless that extra coefficient band is present.

Color bands on resistors encode the numeric value and the precision of that value. The bands give you the significant digits and a multiplier to determine the resistance, while a separate band (usually the last one) shows the tolerance—how close the actual resistance is to the stated value. On many resistors you’ll see four bands: two digits, a multiplier, and a tolerance. Some higher-precision types add an extra band that indicates a temperature coefficient (how the resistance changes with temperature) or other reliability information. So this statement is true because the bands mainly convey value and tolerance, with the possibility of an additional spec in certain cases. Voltage isn’t represented by the color bands, and temperature is not shown directly unless that extra coefficient band is present.