Answer :


Linear expansion coefficient of copper is greater than the steel (αcopper > αsteel). So, on heating copper gets more expansion than steel. So the bimetallic strip will bend with the copper on the convex side.


Linear expansion mathematically expressed as



Where,


∆L = change in length


L= original length


α = Linear coefficient of thermal expansion


∆T = change in temperature


Linear expansion coefficient for steel and copper are mentioned in the below table.



Conclusion line missing??

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