Code: beeAeronautical Engineering2nd Semester10 Examination Papers

Basic Electrical Engineering

Official Bihar Engineering University examination question papers, marks distribution, and questions transcript. Available exam sessions: 2026, 2025, 2024, 2023, 2022, 2021.

Exam Year:

Get Instant AI Answers on this Paper

Open BEU Connect Android app to solve any numerical or derive formulas step by step.

Ask AI in App
Official Exam Paper TranscriptB.Tech 2nd Semester Examination, 2026
Bihar Engineering University, Patna
B.Tech 2nd Semester Examination, 2026

Basic Electrical Engineering

Time: 03 HoursCode: 100212Full Marks: 70

Instructions:

  1. The marks are indicated in the right-hand margin.
  2. There are NINE questions in this paper.
  3. Attempt FIVE questions in all.
  4. Question No. 1 is compulsory.
Q.1 Choose the correct option/answer the following (Any seven questions only):[14]

  1. The RMS value of alternating current is the value of DC current that produces

    1. Same magnetic field only
    2. Same peak value
    3. Same heating effect
    4. Same frequency

  2. In a DC motor, the function of commutator is to

    1. Reduce losses
    2. Convert AC armature current into unidirectional torque-producing current
    3. Increase field flux
    4. Act as load

  3. The power factor of a purely resistive circuit is

    1. 0
    2. 5 lagging
    3. 1
    4. 8 leading

  4. A commonly used solder in electrical work is an alloy of

    1. Copper and zinc
    2. Tin and lead
    3. Iron and carbon
    4. Aluminium and nickel

  5. In a three phase star connection, the line voltage is

    1. Equal to phase voltage
    2. Less than phase voltage
    3. √3 times phase voltage
    4. 3 times phase voltage

  6. A star-connected network has arms 3 Ω, 3 Ω and 3 Ω. The equivalent delta resistance of each side is

    1. 3 Ω
    2. 6 Ω
    3. 9 Ω
    4. 12 Ω

  7. A 12 V DC source feeds two series resistors of 2 Ω and 4 Ω. The voltage across the 4 Ω resistor is

    1. 4 V
    2. 6 V
    3. 8 V
    4. 12 V

  8. Eddy current loss can be reduced by

    1. Using solid thick core
    2. Laminating the core
    3. Increasing current
    4. Reducing number of turns to zero

  9. A balanced three-phase load takes line voltage 400 V and line current 10 A at 0.8 pf. Total power is

    1. 3200 W
    2. 4000 W
    3. 5542 W
    4. 6928 W

  10. Magnetomotive force is analogous to

    1. Electric current
    2. Resistance
    3. Voltage
    4. Conductance
Q.2 Solve both questions :[14]

  1. An unknown impedance of Z Ω is connected in series with (5 + j8) Ω. If the current in the circuit is I = 2.5∠−15\circ A, find the value of Z.

    Question Diagram

  2. Draw a neat sketch of a D.C. generator. State the functions of each part and derive the e.m.f. equation.

Q.3 Solve both questions :[14]

  1. What are eddy currents? Explain the cause of eddy current loss and the methods used to reduce it in transformers.

  2. Explain the soldering process in detail.

Q.4 Solve both questions :[14]

  1. Apply Thevenin's theorem to calculate the current through the 5 Ω resistor.

    Question Diagram

  2. Derive the expression for energy stored in a magnetic field.

Q.5 Solve both questions :[14]

  1. Explain the operating principle of a three-phase induction motor. How is a rotating magnetic field produced?

  2. Find the equivalent resistance between terminals A-B in the resistance network

    Question Diagram
Q.6 Solve both questions :[14]

  1. A three-phase load consists of three similar inductive coils, each of resistance 50 Ω and inductance 0.3 H. The supply is 415 V, 50 Hz. Calculate: (a) the line current; (b) the power factor; and (c) the total power when the load is star-connected.

  2. Draw and explain the wiring layout of a small residential installation consisting of lamps, a fan, a socket outlet, a switchboard, a main switch, an energy meter, and a distribution board.

Q.7 Solve both questions :[14]

  1. Derive the torque equation of a D.C. motor.

  2. Obtain a single current source for the network shown below

    Question Diagram
Q.8 Solve both questions :[14]

  1. An 8-pole lap-connected armature has 40 slots with 12 conductors per slot and generates a voltage of 500 V. Determine the speed at which it is running if the flux per pole is 50 mWb.

  2. Explain the principle of operation and construction of a single-phase transformer.

Q.9 Write short notes on any two of the following:[14]

  1. Maximum Power Transfer Theorem

  2. Classify DC machines

  3. State and prove Norton's theorem

  4. Average and RMS value of a sinusoidal voltage

Related Official Syllabus

Engineering Physics

100201

Official BEU curriculum units & topics for this examination subject.

Unit 1.0: Frame of Reference and Oscillations

Non-Inertial frame of reference • Rotating coordinate system • Centripetal and Coriolis acceleration and its application in weather system • Harmonic Oscillator • Damped Harmonic motion: overdamped, critically Damped and lightly damped oscillators • Force Oscillators and Resonance

Unit 2.0: Optics and LASER

Huygens's Principle • Superposition of Waves and interference of Light by wave front-splitting and amplitude-splitting • Young's double slit experiment • Michelson interferometer • Fraunhofer diffraction from single slit and circular aperture • Diffraction Grating and their resolving power • Einstein's theory of matter-radiations interaction • Einstein's Coefficients (A and B) • Amplification by population inversion • Different types of lasers: Gas Laser, Helium-Neon Laser, Solid State Laser (Ruby, Neodymium), Semiconductor Laser

Unit 3.0: Quantum Mechanics

Compton Effect • Photoelectric Effect • Wave Particle duality • de Broglie's hypothesis • Heisenberg's Uncertainty Principle • Wave function and wave packets • Phase and group velocities • Schrodinger's Wave Equation • Normalization • Expectation values • Eigenvalues and Eigenfunction • Application of Schrodinger Wave Equation for particle in one dimensional box: its wavefunction and eigenvalue of energy and momentum

Unit 4.0: Vector Calculus and Electrostatics

Gradient, Divergence and Curl • Line, Surface and Volume integrals • Gauss's Divergence theorem and Stokes' theorem in Cartesian Coordinate • Gauss's Law and its applications • Divergence and Curl of Electrostatic fields • Electrostatic Potential • Boundary Conditions • Poisson's and Laplace's equations • Dielectrics • Polarization • Bound Charges • Electric displacement • Boundary Conditions in dielectrics

Unit 5.0: Magnetostatics and Electrodynamics

Lorentz force • Biot-Savart and Ampere's circuital laws and their applications • Divergence and Curl of Magneto static fields • Magnetic vector potential • Force and torque on a magnetic dipole • Magnetic Materials • Magnetization • Bound currents • Boundary conditions • Ohm's law • Motional EMF • Faraday's Law • Lenz's law • Self and mutual inductance • Energy stored in magnetic field • Maxwell's equations in vacuum and nonconducting medium • Continuity Equation • Poynting Theorem • Wave Equations: plain electromagnetic wave in vacuum and their transverse nature and Polarization

View Complete 2nd Semester Syllabus

Prepare Better with BEU Connect

  • Download papers for 100% offline study
  • Ask AI for step-by-step problem breakdown
  • Attempt official GATE CBT mock tests
  • Calculate SGPA and track attendance
Download Android App