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PHYSICS

Physics
The material used in electric heater is

Tungsten
Brass
Nichrome
Steel

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Physics
After long periods of use, a grey spot develops on the inside of a bulb. This is because

Dust inside the bulb condenses on the top
Glass undergoes a change due to the heat
The tungsten filament evaporates and collects there
The heat of the bulb scorches the glass at the top

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Physics
The coil wire in the electric room heater or electric cooking heater is called ________

Cells
Filament
Element
Circuit

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Physics
The composition of electrician solder is

Lead-37%, Steel-63%
Iron-37%, tin-63%
Steel-37%, copper-63%
Lead-37%, tin-63%

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Physics
An electric iron of 750 W is used for S hours per day. Then the energy consumed in one day by the iron is:

60 units
0.6 units
600 units
6 units

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