About this previous year paper
This document contains the complete and original B.Tech (Semester II) Theory Examination Question Paper for Basic Electrical Engineering (Subject Code: KEE201T) for the 2021–22 academic session. The paper has been carefully designed to evaluate a student’s understanding of essential electrical engineering principles, including AC/DC circuits, electrical machines, transformers, network theorems, power calculations, battery characteristics, and wiring systems.
The examination is structured into three major sections, each assessing the student’s conceptual knowledge, numerical ability, analytical thinking, and practical understanding of electrical engineering applications.
SECTION A – Short Conceptual Questions (2 marks each)
This section includes ten brief questions covering foundational concepts of electrical engineering. Topics include:
V–I characteristics of ideal voltage and current sources
Importance of linearity in circuits
Use of sinusoidal waveforms to represent AC
Why average power is zero in purely inductive circuits
Nature of load that gives negative voltage regulation in transformers
Phasor diagram of an ideal transformer on no load
Expression of generated EMF in a DC generator
Why a synchronous motor is doubly excited
Common problems during electrical installations
Battery characteristics, including definitions
These questions test quick recall and clarity of basic theoretical knowledge.
SECTION B – Analytical, Numerical & Descriptive Questions (10 marks each)
Students must attempt any three out of five questions. This section emphasizes derivations, numerical problem-solving, practical applications, and comparative study. Key topics include:
Equivalent resistance using star–delta or delta–star conversion
Resonant frequency, quality factor (Q), voltage and current calculations in RLC tank circuits
Efficiency and copper losses in single-phase transformers
Factors affecting speed of DC motors and comparison of lap vs. wave winding
Characteristics and backup time calculation of batteries
This section develops the student’s analytical ability and engineering problem-solving skills.
SECTION C – Long Descriptive & Technical Questions (10 marks each)
Each subsection requires the student to attempt one question, covering advanced reasoning, machine theory, and real-world electrical system applications.
Topics include:
Application of Norton’s theorem and Nodal analysis for current calculation
Mathematical derivation of dynamic impedance (ZD) of parallel RLC circuits with phasor diagram
Power factor, total current, and power absorbed by parallel AC circuits
Purpose and development of the approximate equivalent circuit of transformers
Detailed transformer calculations: equivalent resistance, reactance, impedance, copper loss, supply current
Derivation of torque equation of DC motor and calculations of brush voltage & back EMF
Comparison of induction motor vs. transformer
Energy consumption and electricity bill calculations using daily load usage
Construction, ratings, and applications of wires and cables used in electrical installations
These questions deeply evaluate understanding of machine theory, AC/DC performance, circuit analysis, and electrical equipment design.
Sample Questions from the Paper (1–2 included)
“Draw the V-I characteristics for an ideal voltage source and ideal current source.”
— A conceptual question demonstrating understanding of basic source behavior.
“Derive mathematically dynamic impedance (ZD) of a parallel RLC circuit under resonance and draw its phasor diagram.”
— A long analytical question assessing AC circuit theory.
These examples represent the type and depth of questions throughout the examination.
Overall Coverage of This Question Paper
This Basic Electrical Engineering paper comprehensively covers:
Electrical sources & V–I characteristics
AC fundamentals & power concepts
RLC circuits (series & parallel)
Transformer performance, efficiency, losses & equivalent circuits
DC machines (DC generators, motors, torque, speed control)
Induction motors & synchronous motors
Network theorems (Norton, Nodal, Star–Delta)
Batteries: characteristics, backup & practical usage
Wires and cables in electrical installations
Energy consumption, units & electricity billing
It aligns completely with the official university syllabus, providing both theoretical and practical coverage.