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Which outcome occurs when a bimetallic strip in a thermostat undergoes a temperature transition?

A)Change in electrical resistance
B)Deflection due to thermal expansion
C)Initiation of chemical reaction
D)Emission of electromagnetic radiation

💡 Explanation

When a bimetallic strip undergoes a temperature transition, differential thermal expansion occurs because the two metals expand at different rates, causing the strip to bend. Therefore, observable deflection results, rather than resistance change, reaction initiation, or emission which require different material properties.

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