A bimetallic strip is made of aluminium and steel $(α_{Al} > α_{steel})$ . On heating, the strip will

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will bend with aluminium on concave side

will bend with steel on concave side

remains straight

get twisted

answer is D.

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Detailed Solution

As $α_{Al} > α_{steel}$ , aluminium will expand more. So, it should have larger radius of curvature. Hence, aluminium will be on convex side and steel on concave side.

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