Electric lamps

The electric lamp converts the electric energy into…….

• kinetic
• light
• sound
• magnetic

The electric lamps represent aconstant source of light that is ……

• clear
• bright
• free from smoke and odor
• all the previous answers

All the following are from the components of the light bulb except…..

• the filament
• the glass bulb
• two points of connection
• the base of the light bulb

The filament of the light bulb is made of….

• tungesten
• copper
• iron
• aluminum

The filament of the light bulb is made of tungsten because it has ….

• low density
• low melting point
• high melting point
• no conductivity

…..allow the electric current to transfer from the lamp base to the filament

• the tungsten filament
• tha argon gas
• copper and lead wires in the light bulb
• the base of light bulb

All the following are from the components of the fluorescent lamp except…

• tungsten filaments
• points of connection
• two thick copper wires
• glass tube

Which of the following gases is found in the fluorescent lamp but not in the light bulb?

• Neon
• Argon
• Mercury vapour
• water vapour

The inner surface of the tube of the fluorescent lamp is covered with …

• mercury
• a phosphoric material
• copper
• tungsten

The glass tube of the fluorescent lamp contains….

• neon gas
• argon gas
• argon gas and a little of mercury vapour
• hydrogen gas