Q. 7

# Two identical rec

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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