Practical Uses – ThermostatMediumQuestion 31679
Question
A thermostat uses a bimetallic strip because two metals have:
- ASame coefficient of linear expansion
- BDifferent coefficients of linear expansionCorrect
- CSame resistivity
- DDifferent densities only
Correct answer
Different coefficients of linear expansion
Explanation
On heating, one metal expands more than the other, causing the strip to bend and break/make a contact, controlling temperature automatically.