Two metals making up the strip have different rates of expansion, so as heat is applied and the metals expand, one metal will expand faster than the other, causing that side to grow longer faster than the other side. Since the faster growing metal strip is bonded to the slower expanding, now shorter piece of metal, some movement must occur and the only means of movement is to bend.
Bimetallic strips are used in thermostats where two metals, usually steel and copper, are layered together and heated to create a coil that bends with changes in temperature.
Bimetallic strips used in tube light starters typically consist of nickel and iron. These metals are chosen for their differing coefficients of thermal expansion, which allows the strip to bend when heated by the electric current passing through the starter.
A bimetallic thermometer uses a bimetallic strip wrapped into a coil. This strip usually consists of either steel and copper or steel and brass. A bimetallic thermometer is a type of thermometer made with a couple metal strips. They have differing thermal expansions that are brazen together. Any distortion in this apparatus caused by variations in the temperature is used to measure the temperature.
Bimetallic strips are useful in thermostats because they bend when heated, allowing them to trigger switches or valves to control temperature. The differential thermal expansion of the two metals in the strip enables precise temperature sensing and regulation within a thermostat.
The copper has a higher thermal expansion coefficient than the iron. The copper wants to get longer relative to the iron so the bar bends away from the iron strip. For example if iron is on top and copper on the bottom the bar bows downward. This seems opposite to your question conclusion
Bimetallic strips are used in thermostats where two metals, usually steel and copper, are layered together and heated to create a coil that bends with changes in temperature.
Bimetallic strips used in tube light starters typically consist of nickel and iron. These metals are chosen for their differing coefficients of thermal expansion, which allows the strip to bend when heated by the electric current passing through the starter.
A bimetallic thermometer uses a bimetallic strip wrapped into a coil. This strip usually consists of either steel and copper or steel and brass. A bimetallic thermometer is a type of thermometer made with a couple metal strips. They have differing thermal expansions that are brazen together. Any distortion in this apparatus caused by variations in the temperature is used to measure the temperature.
Bimetallic strips are useful in thermostats because they bend when heated, allowing them to trigger switches or valves to control temperature. The differential thermal expansion of the two metals in the strip enables precise temperature sensing and regulation within a thermostat.
The copper has a higher thermal expansion coefficient than the iron. The copper wants to get longer relative to the iron so the bar bends away from the iron strip. For example if iron is on top and copper on the bottom the bar bows downward. This seems opposite to your question conclusion
A bimetallic thermometer uses a bimetallic strip wrapped into a coil. This strip usually consists of either steel and copper or steel and brass. A bimetallic thermometer is a type of thermometer made with a couple metal strips. They have differing thermal expansions that are brazen together. Any distortion in this apparatus caused by variations in the temperature is used to measure the temperature.
Bimetallic strips composed of two different metals with different rates of thermal expansion are used in devices like thermostats and thermometers. When these strips are heated or cooled, they bend due to the different expansions of the metals, which can be used to control switches or indicate temperature changes.
A bimetallic strip is made of two different metals bonded together, which have different coefficients of thermal expansion. This causes the strip to bend when heated or cooled. Bimetallic strips are often used in thermostats, temperature switches, and circuit breakers to control temperature-sensitive mechanisms.
a bimetallic strip
A deformation thermometer measures temperature by monitoring the deformation (expansion or contraction) of a material in response to changes in temperature. When the material is heated, it expands, and this expansion is measured to determine the temperature. Common materials used in deformation thermometers include metals like copper and bimetallic strips.
The two metals chosen for the bimetallic strip have different modulii of thermal expansion, The bimetallic strip bends as the temperature changes and so the strip can be used to activate relays or other electronic switches and so work as a thermostat.
This phenomenon is known as bimetallic strip. When the two metals expand at different rates, due to their different coefficients of thermal expansion, the strip bends as one side elongates more than the other when heated.