What is a thermostat? Briefly explain its principle
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Thermostat is a device which helps in maintaining a constant temperature.
Principle Involved in Working :Thermal Expansion of Solids
Examples : Thermostat is seen in many electrical appliances like Refrigerator, Heater, AC
It consist of bimetallic strip which consists of two thin strips of different metals welded together .
On heating bimetallic strips bend into arc.
This happens because the different metals expand at different rates and the shape of coil changes .
It happens because brass has a higher coefficient expansion than Invar.[ Invar is a known as Nickel iron alloy ]
Principle Involved in Working :Thermal Expansion of Solids
Examples : Thermostat is seen in many electrical appliances like Refrigerator, Heater, AC
It consist of bimetallic strip which consists of two thin strips of different metals welded together .
On heating bimetallic strips bend into arc.
This happens because the different metals expand at different rates and the shape of coil changes .
It happens because brass has a higher coefficient expansion than Invar.[ Invar is a known as Nickel iron alloy ]
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Answer:
device for constant temperature.
Explanation:
on expansion of different metals at same temperature.
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