Chapter 2 - Resistance
Resistance is the opposition of Current. Put simply, resistance - restricts current flow. The primary device used to oppose current is called a Resistor. There are two main types of resistors - fixed and variable. As the names imply - a fixed resistor has a fixed value of resistance and a variable resistor - has a value of resistance that can change. Resistors are contructed from various materials. They come in many sizes and shapes - depending on the materials used, the power rating and whether it's fixed or variable. Typical schematic symbols and physical images are shown below.
Carbon Resistor Color Code
Click the button to see an example of finding the resistance value based on the color code.
