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EndsemMay 20242019 patternFE

Basic Electrical Engineering (BEE) SPPU Endsem Question Paper May 2024

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
May 2024
Max. marks
70
Time
2½ Hours
Semester
I
Paper code
[6260]-5

Printed for: F.E. (All Branches)

Instructions to the candidates

  1. Answer Q.1 or Q.2, Q.3 or Q.4, Q.5 or Q.6, Q.7 or 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 a series RLC circuit.

      Also asked:Nov 2025 ·Nov 2023

      [4]
    2. b)

      Prove that a pure inductor excited by sinusoidal voltage source never consumes any power. Draw the circuit diagram and write all necessary equations in steps.

      [6]
    3. c)

      A voltage given by v = 200 sin wt is applied across 50 Ω pure resistor. Obtain the expressions for instantaneous current and instantaneous power for this circuit. Also calculate rms value of current and power consumed.

      [8]

  2. Q2

    1. a)

      Define admittance of a circuit and hence draw the admittance triangle for a capacitive circuit.

      [4]
    2. b)

      Obtain the expressions for instantaneous power and average power in a series R-L circuit excited by purely sinusoidal voltage.

      [6]
    3. c)

      An R-C series circuit dissipates 100 W at 0.75 leading power factor when connected across single phase. 230 V. 50 Hz sinusoidal AC supply. Calculate: i) current drawn ii) impedance in polar and rectangular form iii) resistance of the circuit and iv) value of capacitance 2

      [8]

  3. Q3

    1. a)

      Define the following terms in the context of polyphase AC circuits: i) Symmetric AC supply ii) Phase sequence iii) Balanced Load

      [3]
    2. b)

      Derive the emf equations of a single phase transformer.

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

      [6]
    3. c)

      A delta connected balanced load consists of three coils; each of resistance 6 Ω and inductive reactance 8 Ω supplied by 400V, 3-phase AC. Determine i) impedance per phase ii) phase current and line current iii) power factor of the circuit iv) total power absorbed

      [8]

  4. Q4

    1. a)

      State any three advantages offered by an autotransformer.

      [3]
    2. b)

      A direct loading test is performed on a 1 KVA, 230V/115 V, 50 Hz single phase transformer. Draw the connection diagram showing all necessary measuring instruments with appropriate ranges and determine the rated primary and secondary current.

      [6]
    3. c)

      Obtain the relationship between line current and phase current, line voltage and phase voltage for 3-phase star connected balanced inductive load with the help of neat circuit diagram and phasor diagram. Assume phase sequence as RYB.

      Also asked:May 2025 ·May 2023

      [8]

  5. Q5

    1. a)

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

      [4]
    2. b)

      Obtain the formulae for converting a delta connection of resistors into its equivalent star connection.

      [6]
    3. c)

      Write the Kirchhoffs Voltage Law equations for the circuit shown in Fig. below and hence find the current through branch AB. All resistance values are in Ω . 3

      [8]

  6. Q6

    1. a)

      State and explain Kirchhoff’s Laws for DC circuits.

      Also asked:Nov 2023

      [4]
    2. b)

      Find the equivalent resistance obtained across B and C terminals for the circuit shown in Fig. below. All resistance values are in Ω .

      [6]
    3. c)

      State Superposition Theorem. Explain the steps to apply Superposition Theorem for finding the current through branch A B of the circuit shown in fig. below.

      [8]

  7. Q7

    1. a)

      Specify the following in case of a Lithium Ion Battery: i) Cathode material ii) Anode material iii) Electrolyte material

      [3]
    2. b)

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

      [6]
    3. c)

      Define insulation resistance and hence derive an expression for insulation resistance of a single core cable.

      Also asked:May 2025 ·Nov 2023 ·May 2023

      [8]

  8. Q8

    1. a)

      Define resistance temperature coefficient (RTC) and write its unit.

      Also asked:Nov 2023

      [3]
    2. b)

      An electric pump lifts 72 m 3 of water per hour to a height of 15 m. If the overall efficiency of the system is 70 %, find the input power. If the pump is used for 4 hours in a day, find the daily cost of energy at Rs. 10 per unit.

      Also asked:Nov 2025

      [6]
    3. c)

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

      [8]