Question

Draw a diagram showing the two terminals of a bulb.

Answer 1

Hint: Incandescent lamp has two terminals, one called a positive terminal and the other one known as negative terminal. These terminals are fixed in such a way that they do not touch each other. They are insulated by the glass base of the electric light bulb.

Complete step by step answer:
An incandescent light bulb, also known as incandescent light globe is an electric light with a wire filament heated until it glows. The bulb encloses the filament to protect the filament from the oxidation. Current is supplied to the filament by the help of terminals or wires embedded in the glass. A bulb socket provides electrical connections and mechanical support to the bulb.
Incandescent light bulbs consist of a sealed or air-tight glass enclosure, called the envelope, or bulb. It has a filament of tungsten wire inside the bulb, through which an electric current is passed. Contact wires and a base having two or more conductors provide necessary electrical connections to the filament of the bulb. Incandescent light bulbs usually contain a glass mount structure, known as a stem, fixed to the base of the bulb that allows the electrical contacts to run through the envelope without air or gas leaks. Small wires embedded in the stem support the filament and its lead wires.
Electrical filaments are used in hot cathodes of fluorescent lamps and vacuum tubes which serve as a source of electric charge. When it is used as a source of electrons, they possess a special coating that increases the electron production. To improve the efficiency of an electric bulb, the filament usually consists of multiple coils having coiled fine wire, known as coiled coil. Light bulbs using coiled coil filaments are called double-coil bulbs.

An electric bulb has two terminals. The base of the electric bulb and the metal tip of the base are the two terminals of the bulb. One is called a positive terminal while the other is called a negative terminal. The filament of the electric bulb is connected to its terminals. These two terminals are fixed at their places in such a way that they do not touch each other. The incandescent bulb glows when electric current passes through it. The electric current passes from one terminal of the electric bulb to the other terminal in a closed electric circuit.

Note:
An electric bulb has two terminals. At the very end of the light bulb, there is a small round tip which is the positive contact surface. The outer threaded part of the base of the bulb is the negative connection contact surface. These two parts are insulated by the glass base of the light bulb.