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EndsemNov 20232019 patternFE

Basic Electrical Engineering (BEE) SPPU Endsem Question Paper Nov 2023

All 8 questions from this SPPU endsem paper, as printed. Read them here or open the PDF.

Open the PDFMost repeated BEE questions
Subject code
103004
Pattern
2019 pattern
Exam
Endsem
Session
Nov 2023
Max. marks
70
Time
2½ Hours
Semester
I/II
Paper code
[6178]-5

Printed for: F.E. (All Branches)

Instructions to the candidates

  1. AttemptQ.1 or Q.2, Q.3 or Q.4, Q.5 or Q.6, Q.7or Q.8
  2. Neat diagrams must be drawn wherever necessary.
  3. Figures to the right indicate full marks.
  4. Assume suitable data, if necessary.
  5. Use of non-programmable electronic pocket calculator is permitted.

Questions

  1. Q1

    1. a)

      Derive the expression for resonant frequency in an RLC series circuit.

      Also asked:Nov 2025 ·May 2024

      [4]
    2. b)

      This part has equations that don’t show as text. Open the PDF to read it.

      [6]
    3. c)

      A coil of resistance 24  has a reactance of 32  when connected across a single phase voltage given by v = 566 sin314 t . Find: i) Frequency ii) Rms value of current iii) Power factor iv) Equation of the resultant current

      [8]

  2. Q2

    1. a)

      State the power factor in case of following circuits: i) A purely resistive circuit ii) A purely inductive circuit iii) A purely capacitive circuit iv) An RLC series circuit under resonance

      [4]
    2. b)

      This part has equations that don’t show as text. Open the PDF to read it.

      [6]
    3. c)

      This part has equations that don’t show as text. Open the PDF to read it.

      [8]

  3. Q3

    1. a)

      Define the following in the context of three phase AC systems: i) Symmetrical AC supply ii) Phase Sequence iii) Balanced Load

      Also asked:Jan 2026

      [3]
    2. b)

      Derive the emf equation of a single phase transformer. Hence obtain the transformation ratio.

      Also asked:Jan 2026 ·Nov 2025 ·May 2025 ·May 2024 ·May 2023

      [6]
    3. c)

      Three impedances each of (3- j4)  are connected in delta across a 3-phase. 230 V supply. Calculate: i) Phase and line currents ii) Power factor of the load iii) Power delivered to the load

      [8]

  4. Q4

    1. a)

      Compare an autotransformer with a conventional two-winding transformer by mentioning any three differences.

      [3]
    2. b)

      Prove that the three phase delta connected balanced load consumes thrice the power consumed by that of the star connected load.

      [6]
    3. c)

      The primary winding of a single phase transformer is connected to a 230 V, 50 Hz supply. The secondary winding has 1500 turns. If the maximum value of the core flux is 0.00215 Wb, determine i) secondary induced emf ii) number of turns in the primary iii) cross sectional area of the core if the maximum value of flux density is 0.1 T iv) whether it is a step up or a step down transformer?

      [8]

  5. Q5

    1. a)

      State and briefly explain Kirchhoff’s Laws for DC circuits.

      Also asked:May 2024

      [4]
    2. b)

      Obtain the relations for converting delta connected resistances into equivalent star connection.

      [6]
    3. c)

      Find the current through 1  resistance of the circuit shown in Fig. 1 below using Thevenin’s Theorem. 3

      [8]

  6. Q6

    1. a)

      Define the following terms: i) Active Network and Passive Network ii) Lumped Network and Distributed Network

      [4]
    2. b)

      Find the current through branch AB of the circuit shown in Fig.2 below by applying Kirchhoff’s Laws.

      [6]
    3. c)

      State Superposition Theorem. Find the current through branch AB of the circuit shown in Fig.2 above by applying Superposition Theorem.

      [8]

  7. Q7

    1. a)

      Define the temperature coefficient of resistance of a material and state its unit.

      Also asked:May 2024

      [3]
    2. b)

      Explain the construction and working of a Lead Acid Battery with the help of suitable diagram and chemical equations.

      Also asked:Nov 2025 ·May 2025

      [6]
    3. c)

      An electric kettle is required to heat 5 liters of water from 15°C to 96°C in 30 minutes. Find the input power of the kettle assuming the efficiency of 80 %. If the kettle operates on 230 V mains, find the resistance of the heating element. Assume the specific heat capacity of water to be 4200.J/kg. K and 1 liter of water as equivalent to a mass of 1kg.

      [8]

  8. Q8

    1. a)

      Write your choice of either a lead acid battery or a lithium ion battery for the following applications: i) Mobile phone ii) Electric bike iii) Conventional petroleum vehicle

      [3]
    2. b)

      An electric motor runs at 500 rpm while producing torque of 20 Nm. The motor operates at efficiency of 85%. Find motor input power and current drawn when the motor is fed from 230V DC supply.

      [6]
    3. c)

      Define insulation resistance and derive the expression for insulation resistance of a single core cable. 

      Also asked:May 2025 ·May 2024 ·May 2023

      [8]