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Questions and Answers
What is the equation for the change in length (DL) of a solid rod due to a change in temperature (DT)?
What is the equation for the change in length (DL) of a solid rod due to a change in temperature (DT)?
- $DL = L \div \alpha \div DT$
- $DL = L + \alpha + DT$
- $DL = L - \alpha - DT$
- $DL = L \cdot \alpha \cdot DT$ (correct)
What does the displacement (x) of rod A depend on?
What does the displacement (x) of rod A depend on?
- $x = (\alpha_A \times \alpha_B) \cdot DT$
- $x = (\alpha_A - \alpha_B) \cdot DT$ (correct)
- $x = (\alpha_A + \alpha_B) \cdot DT$
- $x = (\alpha_A / \alpha_B) \cdot DT$
What is the relationship between the coefficients of linear expansion and the displacement in a bimetallic thermometer?
What is the relationship between the coefficients of linear expansion and the displacement in a bimetallic thermometer?
- $r = d\theta \cdot \alpha_B$ (correct)
- $r = d\theta + \alpha_B$
- $r = d\theta - \alpha_B$
- $r = d\theta / \alpha_B$
What happens to the displacement (r) in a bimetallic thermometer when thinner strips are used?
What happens to the displacement (r) in a bimetallic thermometer when thinner strips are used?
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What is Invar known for in relation to its coefficient of linear expansion?
What is Invar known for in relation to its coefficient of linear expansion?
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