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Two identical...

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Two identical rectangular strips, one of copper and the other of steel, are riveted as shown to form a bi-metal strip. On heating, the bi-metal strip will

A

remain straight

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B

get twisted

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C

bend with steel on the concave side

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D

bend with steel on the convex side

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Solution

The correct option is C
bend with steel on the concave side

On heating, the copper strip will suffer greater elongation and hence the bimetal strip will bend with the steel strip on the concave side.

[Bimetal strips are widely used in thermal switching applications such as automatic electric iron].

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