Basic Electrical Engineering (BEE) SPPU Endsem Question Paper Jan 2026

Questions

1. Q1

   1. a)

      Find the current flowing through 10 ohm resistance using Kirchhoff's loop current method.

      [6]
   2. b)

      Explain with suitable diagram i) Linear network ii) Nonlinear network iii) Lumped network iv) Distributed network.

      [8]
   OR

2. Q2

   1. a)

      Find the equivalent resistance between terminals X and Y. All resistances are in ohm.

      Also asked:May 2025

      [6]
   2. b)

      State and explain Superposition theorem with the help of suitable example. [8] SPPU QUESTION PAPER www.mysppu.in Page 1 MySPPU · Basic Electrical Engineering Page 1 of 3 [6581]-2407-CR 2

3. Q3

   1. a)

      A coil of 1480 turns is wound uniformly on an iron ring of mean circumference 500 cm and cross-sectional area of 8 cm2 A current of 3A is passed through the coil. The iron ring has the relative permeability of 1200, Calculate i) Magneto motive force ii) Magnetic field strength iii) Magnetic flux density iv) Reluctance of the iron ring

      [6]
   2. b)

      Define self-inductance and derive the expression for Energy stored in magnetic field.

      [8]
   OR

4. Q4

   1. a)

      Obtain an expression for coefficient of coupling between two magnetically coupled coils.

      Also asked:Oct 2025 ·Oct 2024 ·Oct 2023

      [6]
   2. b)

      Derive the expression for mutually induced EMF in terms of mutual inductance. Also state any three factors affecting value of mutual inductance.

      [8]

5. Q5

   1. a)

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

      [6]
   2. b)

      Define the RMS value and derive an expression for RMS value in terms of maximum value for sinusoidally varying current.

      [8]
   OR

6. Q6

   1. a)

      A pure inductor having inductance of 200mH 230 V, 50 Hz single phase AC supply. Determine i) Inductive reactance ii) RMS and maximum value of current iii) Equation for instantaneous value of current

      [6]
   2. b)

      Derive the expression for instantaneous and average power in case of purely resistive circuit. Also draw the waveforms for voltage, current and instantaneous power. [6] SPPU QUESTION PAPER www.mysppu.in Page 2 MySPPU · Basic Electrical Engineering Page 2 of 3 [6581]-2407-CR 3

7. Q7

   1. a)

      Resistance of 20 ohm and Capacitance of 50uF are connected in series across 230 V, 50 Hz single phase AC supply. Calculate i) Capacitive reactance ii) Impedance iii) Current iv) Active power

      Also asked:Nov 2025 ·May 2023

      [6]
   2. b)

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

      [8]
   OR

8. Q8

   1. a)

      A three-phase delta-connected load, with impedance of (25 + 𝑗40) is fed from a three-phase 440 V, 50 Hz supply, Calculate: i) Phase current ii) Line current iii) Power factor iv) Total active power

      [6]
   2. b)

      Define the following terms with three phase AC circuit i) Phase Sequence ii) Symmetrical system iii) Balanced load iv) Unbalanced load

      Also asked:Nov 2023

      [8]

9. Q9

   1. a)

      A 10 kVA 220/440V, 50Hz. single phase transformed, primary and secondary resistance of 0.4292 and 0.849 respectively. The eddy current loss in core is 310W and hysteresis loss in the core is equal to 380W. Calculate i) Total iron losses ii) Total copper losses on full load iii) Efficiency at 80% of the full load at 0.8 p.f leading

      [6]
   2. b)

      List the different types of electrical Motors. Explain working principle of three phase induction motor.

      [8]
   OR

10. Q10

    1. a)

       Derive the EMF equation of single-phase transformer.

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

       [6]
    2. b)

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

       [8]