Thermal Properties of Material

  • To understand basic electrical property of the engineering materials.

  • Define electrical properties of a material such as electrical conductivity,semi- and super-conductivity, resistivity and their importance in calculation of resistance.

  • To understand the energy-band model for electrical conduction in materials.

  • Specific Heat the ratio of the heat added to (or removed from) an object to the resulting temperature change.

  • Coefficient of thermal expansion measures the fractional change in size per degree change in temperature at a constant pressure.

  • Thermal Conductivity, which is used in Fourier’s law of heat conduction, is the measure of ability of a material to conduct heat.

Solved Example:

50-3-01

What physical property of a material that refers to the temperature at which ferromagnetic materials can no longer be magnetized by outside forces?

Correct Answer: D

Solved Example:

50-3-02

What physical property of a material that refers to the rate of heat flow per unit time in a homogeneous material under steady-state conditions per unit area, per unit temperature gradient in a direction perpendicular to area?

Correct Answer: B

Solved Example:

50-3-03

What physical property of a material refers to the ratio of the amount of heat required to raise the temperature of a unit mass of a substance 1 degree to the heat required to raise the same mass of water to 1 degree.

Correct Answer: A