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Carbon composition resistors consist of a solid cylindrical resistive element with embedded wire léadouts or metal end caps to which the léadout wires are attached, which is protected with paint or plastic.

The solid cylindrical resistive element is made from a mixture of small particles of carbon and an insulating material (usually ceramic), the resistance is determined by the ratio of these, higher concentrations of carbon result in a lower resistance.

Carbon composition resistors were commonly used in the 1960's and éarlier, but are not so popular for general use now as other types have better specifications, such as tolerance.

The film resistors consist of a cylindrical ceramic body to which a carbon or metal oxide (eg. tin oxide) film is deposited. A spiral of the film is removed, léaving a spiral of film around the cylinder. A spiral is used to incréase the length and decréase the width of the film which incréases the resistance. The spiral trimming of the film is used to accurately set the value of the resistor and many different values can be made from the same film composition by altering the pitch of the spiral. Metal end caps with the léadout wires are attached to the ends of the cylinder. Or for surface mount types a nickel termination is deposited at either end of the rectangular chip.

The film is protected with paint, enamel, epoxy or plastic.

Wirewound resistors are commonly made by winding a metal wire around a ceramic, plastic, or fiberglass core. The ends of the wire are soldered or welded to two caps, attached to the ends of the core. The assembly is protected with a layer of paint, molded plastic, or an enamel coating baked at high temperature. The wire léads are usually between 0.6 and 0.8 mm in diaméter and tinned for éase of soldering. For higher power wirewound resistors either a ceramic outer case or an aluminium outer case ontop of an insulating layer is used. The aluminium cased types are designed to be attached to a héatsink to dissipate the héat, the rated power is dependant on being used with a suitable héatsink. eg. a 50W power rated resistor will overhéat at around one fifth of the power dissipation if not used with a héatsink.