Resistor Kit types are carbon film, ceramic, metal element, metal film, metal foil, metal oxide, thick film, and wirewound with resistance ranging from 0.0 ohms to 10M ohms and power ranging from 0.03W, 1/32W to 250W. A resistor is a two-terminal passive electronic component designed to oppose an electric current by producing a voltage drop between its terminals in proportion to the current.