BASIC ELECTRICAL ENGINEERING

📄 Paper Description: Basic Electrical Engineering (REE 101)

This document is the Theory Examination Paper for the Basic Electrical Engineering (B.Tech, Semester I) course, identified by Sub Code: REE 101 and Paper Id: 2001, conducted during the 2017-18 academic session.

The examination is designed to assess fundamental concepts and problem-solving skills across core areas of electrical engineering.

Key Topics Covered

The paper is divided into three sections (A, B, and C) and comprehensively tests knowledge in the following areas:

Fundamentals of Circuits & Elements: Definitions of basic electrical quantities, active/passive elements, bilateral/unilateral elements, and ideal/practical sources (Section A, C). Includes analysis using Star-Delta/Delta-Star transformation and Mesh analysis (Section C, B).

AC Circuits & Resonance: Concepts of power factor, impedance, and the behavior of purely resistive, inductive, and capacitive circuits. Derivation and explanation of series and parallel resonance, including Bandwidth and Quality Factor (Section A, B, C).

Three-Phase Circuits: Calculation of power in balanced loads and the derivation of the two-wattmeter method for measuring three-phase power (Section A, B).

Transformers: Principle of operation, reasons for non-use on DC supply, efficiency calculation (including maximum efficiency), and the analogy between electric and magnetic circuits (Section A, B, C).

DC and AC Machines (Motors & Generators): Construction, principle of operation, characteristics, and applications of a DC motor. Includes the EMF equation for a DC generator and concepts of slip and torque-slip characteristics for a 3-phase induction motor (Section A, B, C).

Examination Structure

The paper is of 3 hours duration for a Total Marks of 70, requiring students to answer questions from all three sections:

SECTION A (14 Marks): Contains 7 compulsory, short-answer questions (2 marks each) focusing on definitions and brief explanations.

SECTION B (21 Marks): Requires attempting any three out of five long-answer questions (7 marks each), heavily focused on derivations, complex circuit analysis (e.g., efficiency calculations, mesh analysis), and detailed explanations.

SECTION C (35 Marks): Comprises questions divided into sub-sections, requiring attempts from a set of choices. These questions are typically high-value (7 marks or split into 3.5-mark parts) and cover advanced concepts, derivations, and numerical problems in single-phase, three-phase, magnetic circuits, and machine theory.