Question

Two identical rectangular strips of copper, and the other
of steel are riveted to form a bimetallic strip. What will
happen on heating?​

Answer 1

Answer:

when heated the copper lies on the convex side

Explanation:

A bimetallic strip consists of strips made of two different metals of different coefficients of expansion,riveted together.When heated,it bends such that the strip with more expansion(copper) lies on the convex side.

Uses:-

1. for continuous recording temperature

2. as a thermostat to control the temperature of a body

3. as a fire alarn

Answer 2

Answer:

Since the value of linear expansion α for copper is more than linear expansion α for steel. Hence the bi-metallic strip will bend in such a way that copper strip remain on outer or convex side.

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Which object will cool faster when kept in open air, the  one at 300°C or the one at 100°C Why?​

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