Q. The unit of the coefficient of linear expansion is __________.

रैखिक विस्तार के गुणांक की इकाई __________ है।

A
°C
डिग्री सेल्सियस
B
°C⁻¹
C
m/°C
मी/डिग्री सेल्सियस
D
J/°C
जे/डिग्री सेल्सियस

Explanation

The coefficient of linear expansion (α) measures how much a material expands per unit length per degree change in temperature. Its formula is:
α=ΔLLΔT\alpha = \frac{\Delta L}{L \Delta T}
Where:

  • ΔL = change in length

  • L = original length

  • ΔT = temperature change
    Hence, the unit is 1/°C or °C⁻¹.

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