EX-504 (C) RGPV B.Tech

Electrical and Electronic Materials (EEM)

Previous year papers and the official syllabus are free to read, no account needed.

Previous Year Papers

4 papers, latest Dec 2025

Free

Topics as the official RGPV syllabus lists them.

Unit 1 Crystal Structure and Engineering Materials 9

Crystal structure of materials; crystal systems; unit cells, space lattices and lattice defects
Classes of engineering materials – metals and alloys, ferrous and non‑ferrous alloys
Low‑alloy steels, aluminium alloys, copper alloys, stainless steels and cast iron
Ceramics, organic polymers and composite materials
Classification of solids from an electrical‑engineering point of view
Conducting materials – properties of conductors and characteristics of good conductors
Commonly used conducting materials for overhead lines, underground cables and electrical machines
Types of conductors and conductor configurations
Resistor materials, types of resistors and materials for bus‑bars

Unit 1 notes

Unit 2 Dielectric Materials and Insulators 8

Dielectric materials – dielectric strength, factors affecting dielectric strength, dielectric loss and dissipation factor
Permittivity, polarization and charging/discharging of dielectrics
Conduction mechanisms through dielectrics
Applications of dielectrics in different types of capacitors and the materials used for them
Insulating materials – thermal, chemical, mechanical and electrical properties
Common insulating materials such as ceramic, mica, glass, rubber, resins, wax‑varnishes and classification of insulators
Transformer oils and their testing procedures
Piezoelectricity and ferroelectricity

Unit 2 notes

Unit 3 Energy‑Band Theory and Semiconductor Applications 6

Energy‑band diagram concepts for conductors, semiconductors and insulators
Types of semiconductor materials and their working principles
Temperature‑sensitive semiconductor elements and photoconductive devices
Photovoltaic cells, varistors, Hall‑effect generators, LCDs, light‑dependent resistors and LEDs
Piezo‑electric semiconductor materials, semiconductor lasers and their characteristics
Photo‑conductors, photodiodes, avalanche photodiodes and photo‑transistors

Unit 3 notes

Unit 4 Magnetic Materials 6

Classification of magnetic materials – diamagnetism, paramagnetism, ferromagnetism
Magnetisation curves, hysteresis loops and magnetostriction
Factors influencing permeability and hysteresis
Anti‑ferromagnetism and ferromagnetism, magnetic resonance
$B\!\!-$H curves for different magnetic materials, magnetic losses and impurity effects
Soft and hard magnetic materials, ferrites

Unit 4 notes

Unit 5 Superconductivity and Advanced Functional Materials 5

Unit 5 notes

Counted from 4 past EX-504 (C) papers.

Average marks of the questions from each unit in one paper. You answer only some of them, so the total is more than the paper’s maximum.

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

Asked 4 times: 2025, 2024, 2020
Explain hard and soft magnetic materials (including on the basis of magnetic susceptibility).

Asked 3 times: 2025, 2020
What is superconductivity? Explain superconductivity and its applications.

Asked 3 times: 2025, 2020