InterviewSolution
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InterviewSolution
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efine - coefficient of linear expansion, coefficientof superficial expansion and coefficient of cubicalexpansion of solids. State their units. |
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Answer» 1.TheCoefficient of linear expansionof the given solid is denoted as a. then for aunitis per degree Celsius) in the CGS and in the SI system it is per kelvin K-1.The coefficient of linear expansion is the change in length of a specimen one unit long when its temperature is changed by one degree. 2. The amount by whichunitarea of a material increases when the temperature is raised by one degree is called thecoefficient of superficial(i.e. area)expansionand is represented by β (Greek beta).The coefficient of superficial expansion is defined as the increase in area per unit original area at 00c per unit rise intemperature. 3.Increase in volume of a body on heating is referred to as. "VOLUMETRICEXPANSION" or "CUBICAL EXPANSION". Consider a metallic body of volume = V1 . Let it's temperature is raised by T. then experimentally "Increase in volume ( V) is directly proportional to its initial volume (V1) and rise in temperature ( T). |
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