RTU Kota B.Tech 1st Year Basic Electrical Engineering Sem-II Question Paper 2025

RTU Basic Electrical Engineering Sem-II 2025 Paper Review

Preparing for the Rajasthan Technical University B.Tech Basic Electrical Engineering exam requires a strong command of mathematical calculations and circuit theories. The Sem-II 2025 paper tests your theoretical knowledge and your ability to solve complex electrical networks. Reviewing this paper shows you exactly how examiners structure the questions and allocate marks among the syllabus modules. This preparation allows you to approach your semester exam confidently.

Understanding the Exam Pattern

The RTU theory examination is a three hour paper worth 70 marks. The paper consists of three distinct sections.

• Part A: This section contains ten compulsory questions worth two marks each. You must write short definitions or solve very basic numerical formulas under 30 words.
• Part B: You will find seven questions here. You must answer five of them. Each question is worth four marks. Your answers require short circuit derivations or 100 word theoretical explanations.
• Part C: This section offers five major questions. You need to answer three. Each question carries ten marks. These require detailed phasor diagrams, long mathematical proofs, or multi step numerical solutions.

Core Topics Evaluated in the Paper

The Sem-II 2025 question paper covers several critical modules. Focus your study time on these specific areas to maximize your score.

DC Circuits and Network Theorems

This module forms the base of the entire paper. You must know how to apply Kirchhoff Voltage Law and Kirchhoff Current Law to solve mesh and nodal analysis problems. Examiners frequently ask you to find the current flowing through a specific resistor using network theorems. Practice numerical problems based on Superposition, Thevenin, Norton, and Maximum Power Transfer theorems. You need to draw the equivalent circuits perfectly to secure full marks in these questions.

Single Phase and Three Phase AC Circuits

You will face questions asking for the derivation of RMS values, average values, form factor, and peak factor for a standard sinusoidal alternating wave. Study the behavior of purely resistive, inductive, and capacitive circuits. Practice drawing the phasor diagrams for series RLC circuits. You must calculate the resonant frequency, bandwidth, and Q factor. For three phase systems, memorize the relationship between line and phase voltages in both star and delta connections. Expect a numerical problem asking you to calculate active, reactive, and apparent power.

Single Phase Transformers

This is a high scoring theoretical and numerical section. You must explain the construction and working principle of a core type and shell type transformer. Practice deriving the EMF equation of a transformer. Examiners consistently ask you to describe the open circuit and short circuit tests. You must know how to use the test data to calculate the equivalent circuit parameters, efficiency, and voltage regulation at various power factors.

Electrical Machines

This section evaluates your basic understanding of rotating machines. You need to explain the working principle of a DC generator and a DC motor. Study the significance of back EMF in a DC motor and derive its torque equation. The paper also tests your knowledge of AC machines. You must describe the generation of a rotating magnetic field in a three phase induction motor and define the concept of slip.

Electrical Installations and Safety

Examiners test your knowledge of domestic wiring and safety components. You must explain the functions and working mechanisms of protective devices like Switch Fuse Units, Miniature Circuit Breakers, and Earth Leakage Circuit Breakers. Study the different types of wires and cables used in residential buildings. You need to write a clear explanation of plate earthing and pipe earthing, along with their labeled diagrams.

Answer Writing Strategy for High Marks

RTU evaluators look for accurate formulas, correct units, and neat circuit diagrams in your answer booklet. Use a blue pen for your main text and a black pen for drawing circuits and writing final answers.

In Part A, answer directly. If the question asks for the formula of the form factor, write the exact ratio of the RMS value to the average value. Keep your answers factual and precise.

In Part B, provide a brief explanation accompanied by the relevant circuit diagram. When asked about the difference between a core type and a shell type transformer, use a comparison table. List four specific structural differences to make your answer easy to scan.

In Part C, detail is essential. When solving a ten mark Thevenin theorem problem, draw the circuit at every single step. Show the removal of the load resistor, the calculation of the open circuit voltage, and the calculation of the equivalent resistance. Box your final calculated values and include the correct units like Amperes or Volts. If a question asks for a phasor diagram, draw it large and label all voltage and current vectors clearly.

Time Management During the Exam

Allocate 20 minutes to Part A. Spend 40 minutes on Part B. Reserve the remaining 120 minutes for the three long answer questions in Part C. Solving complex nodal equations or calculating transformer efficiency takes significant time. This structure gives you 40 minutes per major question, allowing you to recheck your calculator inputs and verify your mathematical signs. Use the final 10 minutes to review your answers, ensure all units are written, and verify that all circuit diagrams are completely labeled.