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Questions and Answers
The change (ΔL) of the original length of a solid due to a change (ΔT) of temperature is given by which equation?
The change (ΔL) of the original length of a solid due to a change (ΔT) of temperature is given by which equation?
- $ riangle L = L - \alpha - \triangle T$
- $ riangle L = L \div \alpha \div \triangle T$
- $ riangle L = L \cdot \alpha \cdot \triangle T$ (correct)
- $ riangle L = L + \alpha + \triangle T$
The displacement of rod A is given by which equation?
The displacement of rod A is given by which equation?
- $x = (\alpha_A - \alpha_B) \cdot \triangle T$ (correct)
- $x = (\alpha_A + \alpha_B) \cdot \triangle T$
- $x = (\alpha_B - \alpha_A) \cdot \triangle T$
- $x = (\alpha_A / \alpha_B) \cdot \triangle T$
For a bimetallic thermometer, if Invar is used for strip A, what can be said about αA?
For a bimetallic thermometer, if Invar is used for strip A, what can be said about αA?
- αA is equal to αB
- αA is virtually zero (correct)
- αA is negative
- αA is extremely high
What does r represent in the equation $r = d\theta/\alpha_B$ for a bimetallic thermometer?
What does r represent in the equation $r = d\theta/\alpha_B$ for a bimetallic thermometer?
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What is Invar, also known as FeNi36, notable for?
What is Invar, also known as FeNi36, notable for?
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