The unit of coefficient of linear expansion or volume expansion is__________?
Correct answer: B. K-1
- A. K
- B. K-1
- C. K -2
- D. none
Explanation
The coefficient of linear expansion is α = change in length/(original length x change in temperature), so its unit is 1/K, written K^-1. The same reasoning gives K^-1 for the coefficient of volume expansion. The likely mistake is choosing K, but the temperature unit appears in the denominator.
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