Question

What is bimetallic thermometer? Which material is used in this type of thermometer?

Answer 1

The bimetallic thermometer uses the bimetallic strip which converts the temperature into the mechanical displacement. The working of the bimetallic strip depends on the thermal expansion property of the metal. The thermal expansion is the tendency of metal in which the volume of metal changes with the variation in temperature.
The bimetallic strip is constructed by bonding together the two thin strips of different metals. The metals are joined together at one end with the help of the welding. The bonding is kept in such a way that there is no relative motion between the two metals. The physical dimension of the metals varies with the variation in temperature.

Since the bimetallic strip of the thermometer is constructed with different metals. Thereby, the length of metals changes at different rates. When the temperature increases, the strip bends towards the metal which has a low-temperature coefficient. And when the temperature decreases, the strip bends towards the metal which has a high-temperature coefficient.

Hope it helps!!

Answer 2

Answer:

What is Bimetallic Thermometer? Definition: A thermometer which uses two different metal strips for converting the displacement of temperature into mechanical. The metals used in the thermometer are steel, copper & brass. These strips are connected and they will enlarge at different rates once they heated.