module 3: Parts of Incandescent Bulb ( quiz )

It is a conducting wire or thread with a high melting point, forming part of an electric bulb or vacuum tube and heated or made incandescent by an electric current.

• lead in wires

• filament

• fuse

• bulb

This is a mixture of nitrogen found inside the bulb , and in most lamps , 40 Watts or higher...

• gas

• oxygen

• lithium

• fuse

This is made of copper , these wires carry the current to the filament.

• fuse

• filament

• lead in wires

• base

This is usually made of soft glass . hard glass maybe used in some lamps to withstand higher temperature and to protect them against sudden changes in the weather .

• base

• bulb

• mica disk

• fuse

This is used in higher-wattage general service lamps and in other types when the circulation of hot gases into the neck of bulb needs to be reduced .

• mica disk

• bulb

• fuse

• support wire

It is metal wire holding the filament.

• lead in wires

• support wire

• base

• stem

This is a typical screw base, one lead- in wire is soldered to the center contact ,and the other, to the upper rim of the base shell ,which is made of brass.

• lead in wires

• base

• wire support

• filament

This device protects the lamp and circuit by blowing if the filament arcs.

• fuse

• mica disk

• support wire

• lead in wires