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Worksheetsgrade 6 unit 2 lesson 1 part 1
Total questions: 12
Worksheet time: 6mins
................ are from the artificial sources that are used before inventing
electric lamps.
a.candeles
b. Oil lamps
c. Fluorescent lamps
d. (a) and (b)
The electric lamps represent a constant source of light that is.......................
a. clear
b. bright.
c. free from smoke and odor
d.(a), (b) and (c).
The electric lamp converts the electric energy into........................energy
a. kinetic
b. light
C. sound
d. magnetic
All the following are from the components of the light bulb except .....................
a. the filament.
b. the glass bulb
c. two points of connection.
d. the base of the light bulb,
The filament of the light bulb is made of tungsten because it has.............................
a. low density.
b. low melting point.
c. high melting point.
d. no conductivity.
The filament of the light bulb is made of................................
tungsten.
copper.
aluminium
iron.
............................... AllOW the electric current to transfer from the lamp base to the filament.
The tungsten filament
The argon gas
Copper and lead wires in the light lamp
The base of the light bulb
All the following are from the components of the fluorescent lamp
except....................
a.tungsten filaments.
b. points of connection.
C. two thick copper wires.
d. 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 glass tube in the fluorescent lamps contains.............................
neon gas
argon gas
argon gas and a little of mercury vapour
hydrogen gas
The inner surface of the tube of the fluorescent lamps is covered with...............
mercuy
phosphoric material
copper
tungsten
There are two points of connection at each tip of the fluorescent lamp..........................
a. to react with tungsten filament.
b. to connect the lamp to electricity
c. to prevent air from reaching the filament.
d. (a), (b)and (c).
