If a resistor's fourth color band is silver, the resistance value is within what percentage of the marked value?

When interpreting the color bands on a resistor, each color corresponds to specific digits, and the tolerance value is indicated by the last color band. If the fourth color band is silver, it signifies a tolerance of ±10%. This means the actual resistance can vary by 10% above or below the resistance value indicated on the resistor.

In practice, this tolerance indicates the maximum allowable deviation from the stated resistance value. Therefore, if the resistance is marked as, say, 100 ohms, the actual resistance could range between 90 ohms and 110 ohms.

Understanding these color codes and their meanings is essential for accurately assessing resistor values in electronic circuits, and knowing that a silver band denotes a 10% tolerance helps ensure that components are utilized correctly within their specified limits. This context reinforces the importance of the correct identification of the color coding when working with electronic components.