Resistors are critical in many circuit designs. The only problem seems to be that the resistors disappear into thin air. By stocking up on a variety of resistors, you'll always have the one you need close at hand!
A resistor is a passive electrical component that implements electrical resistance as a circuit element. In electronic circuits, resistors are used to reduce current flow, adjust signal levels, to divide voltages, bias active elements, and terminate transmission lines, among other uses.