# What would happen if you heated up a bimetallic strip made of copper and silver ?

## Question:

What would happen if you heated up a bimetallic strip made of copper and silver?

## Thermal Expansion:

When a material heated upto a temperature, then the expansion in the length of the material due to the temperature is known as the thermal expansion of the material, and when the material is cooled upto a temperature, then the compression in the length of the material due to the decrease in the temperature is known as the thermal compression.

The coefficient of thermal expansion for the copper is {eq}17\times10^{-6}/^{\circ}\rm{C} {/eq}, and the coefficient of the thermal expansion for the silver is {eq}18\times10^{-6}/^{\circ}\rm{C} {/eq} means the elongation in the length of the copper will be less than the elongation in the length of the silver. If the bimetallic strip's half-section is made up of the silver and the other half is made up of the copper, then the strip will bend towards the copper as silver will expand more than the copper.

Thus the bending in the strip will be occurred towards the copper when heated up to temperature.