Question
Download Solution PDFWhich of the following materials has nearly zero coefficient of expansion?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFExplanation:
Co-efficient of expansion:
- The coefficient of expansion of a material is numerically equal to the ratio of increase in length, area or volume to its original length, area or volume when the material is heated by 1 °C.
Unit - °C-1 or K-1
|
Material |
Co-efficient of thermal expansion (10-6 m/m°C-1) |
|
Invar |
1.5 (≈ 0) |
|
Stainless steel |
10-17 |
|
Silver |
19-20 |
|
Selenium |
37 |
Important Points
- Invar – It is an alloy of Nickel (36%) and Iron (64%).
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