Bimetallic switch: Change in temperature lights cold/hot lamps.

4A30.11 • C+70+40

diagram for demo

Bimetallic switch: Change in temperature lights 'cold' or 'hot' lamps. A bimetallic strip is a two-way switch in this demo. At room temperature, the strip touches the contact that lights the blue light. When a hair dryer heats the strip, the strip bends and touches the contact that lights the red light. TEMPERATURE AND EXPANSION.

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