Gujarati
Hindi
10-1.Thermometry, Thermal Expansion and Calorimetry
normal

If a bimetallic strip is heated it will

A

Bend towards the metal with lower thermal expansion coefficient.

B

Bend towards the metal with higher thermal expansion coefficient.

C

Not bend at all

D

Twist itself into a helix

Solution

When a material is heated, it expands in length by an amount equal to $\alpha \Delta T$, where $\alpha$ is the coefficient of linear thermal expansion and $\Delta T$ is the change in temperature.

The metal which expands the most will therefore be the one which has the largest coefficient of linear thermal expansion. a bimetallic strip is heated it will bend towards the metal with lower thermal expansion coefficient.

Standard 11
Physics

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