Name: Thermal Conductivity of Materials
Uploaded: 2019-07-19
Duration: 7 min 25 s
Description: You know, different materials have different Thermal conductivity. Let's understand the phenomenon of Thermal Conduction and how materials are useful on the...

Question

What is meant by ‘linear expansion coefficient of copper’ is

17 \times 10^{- 6} / ° C

? Why does the value remain the same even in kelvin scale?

Accepted Answer

When a body is heated or cooled, the length of the body changes due to a change in its temperature. This change or expansion is said to be linear expansion. The ratio of increase in length of the body per degree rise in temperature to its unit length is called the coefficient of linear expansion. The linear expansion coefficient of copper is $17 \times 10^{- 6} / ° C$ . It means that when a long piece of copper wire, say 'x' length, is heated by a certain temperature, it will expand by $0.00017 x$ for every Celsius (or Kelvin) increase in temperature.

The value of the linear expansion coefficient of copper remains the same even in the Kelvin scale. This is because an increase of $1 ° C$ is the same as an increase of $1 K$ , the difference between the scales is, basically, just the start point.

What is meant by ‘linear expansion coefficient of copper’ is $17 \times 10^{- 6} / ° C$ ? Why does the value remain the same even in kelvin scale?

Important Questions on Thermal Phenomena

Learn and Prepare for any exam you want !

What is meant by ‘linear expansion coefficient of copper’ is 17×10-6/°C? Why does the value remain the same even in kelvin scale?

Important Questions on Thermal Phenomena

Learn and Prepare for any exam you want !

What is meant by ‘linear expansion coefficient of copper’ is $17 \times 10^{- 6} / ° C$ ? Why does the value remain the same even in kelvin scale?