How does the electric iron box work? || FingerTips || Aravind Chidambaram
Channel: FingerTips
Date: 2020-11-20

The electric iron was invented in 1882, by Henry W. Seeley.

The basic principle on which the electric iron works is that when a current is passed through a piece of wire, the wire heats up. This heat is distributed to the sole  plate of the electric iron through conduction.

Thermal expansion is the tendency of matter to change in shape, volume, and area in response to a change in temperature.... The degree of expansion divided by the change in temperature is called the material's coefficient of thermal expansion. It is found to generally vary with temperature.
 
But more interesting part to explore is how does it get automatically switched off after reaching a certain temperature?

This is done with the help of a THERMOSTAT.

A Thermostat exerts control by switching heating or cooling devices on or off.

A bimetallic strip is used to convert a temperature change into mechanical displacement. The strip consists of two strips of different metals which expand at different rates as they are heated, usually steel and copper, or in some cases steel and brass. 


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A video by #Aravind_chidambaram

https://www.youtube.com/channel/UCqE0aE49s8hGHZhKn8qHEtg


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