Electrical and Electronic Materials (EX-504 (C)) - Important Questions

Discuss the classification of engineering materials in detail.

Distinguish between metals and alloys.

Explain the properties, classification and commonly used types of conducting materials.

Describe the crystal structure of materials.

What is dielectric loss and dissipation factor? Discuss the factors affecting dielectric loss.

Explain various factors affecting dielectric strength.

Describe briefly the classes/types of insulating materials.

Draw and explain the energy band diagrams for conductors, semiconductors and insulators.

What is the Hall effect? Derive the expression for the Hall coefficient for an n-type semiconductor and state its applications/importance, with diagrams.

Compare intrinsic and extrinsic semiconductors.

Define semiconductor laser and discuss its characteristics and applications.

Explain hard and soft magnetic materials on the basis of magnetic susceptibility.

Classify and compare diamagnetic, paramagnetic and ferromagnetic materials with their properties.

What is superconductivity? Explain superconductivity and its applications.

Explain SF6 gas, its advantages and applications including use in GIS.

What are ultralight materials and metallic foams? Explain.