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InsemMar 20242019 patternFE

Basic Electrical Engineering (BEE) SPPU Insem Question Paper Mar 2024

All 4 questions from this SPPU insem paper, as printed. Read them here or open the PDF.

Open the PDFMost repeated BEE questions
Subject code
103004
Pattern
2019 pattern
Exam
Insem
Session
Mar 2024
Max. marks
30
Time
1 Hour
Semester
I/II
Paper code
[6267]-4

Printed for: F.E (All Branches)(Insem)

Instructions to the candidates

  1. Attempt Q.1 or Q.2, Q.3 or Q.4.
  2. Neat diagrams must be drawn wherever necessary.
  3. Figures to the right indicates full mark
  4. Assume suitable data, if necessary.
  5. Use of non-programmable electronic calculator is allowed

Questions

  1. Q1

    1. a)

      Obtain the expression for the mutually induced emf in a coil when the neighboring coil is excited by a current. Draw the circuit diagram and mention all the natations clearly.

      [7]
    2. b)

      A magnetic circuit consists of an iron ring of mean circumference 80 cm with cross sectional area 12cm 2 . A current of 2 A in the magnetizing coil of 200 turns produces a total flux of 1.2mWb in the iron. Calculate: i) flux density in the iron ii) absolute and relative permeability of iron iii) reluctance of the circuit

      [8]

  2. Q2

    1. a)

      Derive the expression for the energy. stored in the magnetic field of a coil and hence, the energy stored per unit volume of the circuit.

      Also asked:Oct 2025 ·Oct 2023

      [7]
    2. b)

      Two coils having 50 and 500 turns respectively are wound side by side on a closed iron circuit of cross section 50cm 2 and mean length 120 cm. i) Estimate the mutual inductance between the coils if the permeability of iron is 1000. ii) Find the self-inductance of each coil. iii) If the current in one coil increases steadily from zero to 5 A in 0.01 second, find the emf induced in the other coil. 2

      [8]

  3. Q3

    1. a)

      What is phase? Explain the concepts of phase lag between two alternating quantities by i) Mathematical equations ii) Drawing waveforms and phasor diagrams.

      [7]
    2. b)

      Three sinusoidally alternating currents varying at 50Hz have rms values 5 A, 7.5 A and 10 A with phase angles of 30º, – 60º and 45º respectively. i) Find their average values ii) Write equations for their instantaneous values iii) Find the instantaneous values of 10 A current at 100 mSec.

      [8]

  4. Q4

    1. a)

      Obtain the rms value of a sinusoidal alternating current in terms of its peak value and hence find the peak factor.

      [7]
    2. b)

      A potential difference of 10 kV is applied to the terminals of a 300 pF capacitor with two rectangular plates each having an area of 100cm 2 and separated by a dielectric 1 mm thick. Calculate: i) Total charge ii) Electric flux density iii) Relative permittivity of the dielectric … … …

      [8]