School of Physics Lecture Demonstration Manual

Hb-5 The Bimetallic Strip (Compound Bar)

Published: Monday 13 March 2006 - Updated: Monday 28 March 2011

Aim

To demonstrate differential expansion and curvature induced by unequal expansion.

Apparatus

Diagrams

Click on pictures to enlarge.

Bimetallic Bar Diagram

Description

The bimetallic strip suffers appreciable curvature within a few seconds of being placed in the flame of the bunsen burner. A dismantles fire alarm that relies on a bimetallic strip as its sensor is also available if required.

Safety notes

Fire/Burn Safety 

Maintenance 

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