About this previous year paper
This is a fully structured AKTU B.Tech First Year – Basic Electrical Engineering (BEE) question paper designed as per the official 100-mark university exam pattern. The paper is divided into Section A, Section B, and Section C, covering all major concepts of electrical circuits, AC/DC systems, transformers, DC machines, induction motors, power factor, resonance, network theorems, and household wiring systems.
This question paper is extremely useful for students preparing for semester exams, internal tests, assignments, viva exams, and for strengthening their understanding of core electrical engineering topics through numericals, phasor diagrams, derivations, and objective theory.
SECTION A – Short Questions (10 × 2 = 20 Marks)
This section covers the most important fundamentals of electrical engineering:
Active vs passive elements
Bilateral vs unilateral elements
Ideal voltage & current sources
Q-factor of series RLC circuit
Phasor representation of AC currents
Transformer behavior on DC supply
Changing direction of rotation of DC motor
Starting methods of single-phase induction motor
Why earth pin is bigger & thicker
Advantages of auto-transformer
Household energy consumption calculation
This section helps students quickly revise definitions, concepts, and reasoning-type questions.
SECTION B – Descriptive Questions (Attempt Any 3 × 10 = 30 Marks)
This section contains numericals, derivations, circuit analysis, and practical electrical engineering concepts:
Network Theorems
Find current through resistor using Superposition Theorem
Resonance in AC Circuits
Derive resonance frequency of series RLC
Calculate:
Capacitance at resonance
Voltage across capacitor
Q factor
Transformer Efficiency
100 kVA, 1100/440 V transformer efficiency calculation
Full-load & part-load efficiency at given power factors
DC Generator
Lap-connected 4-pole generator
Armature current & generated EMF with brush contact drop
Battery Characteristics
Charging/discharging behavior
Backup time for 100AH battery supplying 100W load
These questions cover all key electrical machines and circuit topics.
SECTION C – Long Questions (5 × 10 = 50 Marks)
Students must attempt ONE part from each question.
Q3 – Network Theorems
Norton's Theorem + current through resistor
OR
Mesh/Node analysis to find current in circuit
Q4 – AC Circuits & 3-Phase Systems
Derive parallel resonance & Q-factor
OR
Delta-connected 3-phase load
Line current
Power & power factor
Phasor diagram
Q5 – Transformers
Principle & operation of single-phase transformer
EMF equation derivation
OR
Voltage regulation definition, significance, ideal value
Q6 – DC Machines & Induction Motors
Derive EMF equation of DC generator + numerical
OR
Frequencies of stator & rotor current, slip calculations, rotor speed
Q7 – Electrical Devices & Wiring
Short notes on:
MCB
MCCB
Fuse
Types of wiring
Useful for electrical safety, domestic installations, and power distribution basics.