N Nexsus

Fundamentals of Electrical Engineering — Major (End Semester) 2023 question paper

MMMUT Computer Science and Engineering previous year question paper for Fundamentals of Electrical Engineering (BEE-101), semester 1, Major (End Semester) 2023. All 24 questions are listed below, each with a written answer on Nexsus.

Paper details

  • Subject: Fundamentals of Electrical Engineering (BEE-101)
  • Branch: Computer Science and Engineering
  • Semester: 1
  • Exam: Major (End Semester) 2023
  • Questions: 24

Questions asked in Fundamentals of Electrical Engineering Major (End Semester) 2023

  1. Q1. Attempt any five parts of the following.
  2. Q1(a). Differentiate the following terms with examples: 1) Network and circuits. 2) Active and passive elements. [2 marks]
  3. Q1(b). Derive an expression of resonant frequency for series RLC circuit. [2 marks]
  4. Q1(c). With proper diagram write the equations for star to delta transformation. [2 marks]
  5. Q1(d). What do you mean source transformation? Explain it with proper figure. [2 marks]
  6. Q1(e). An alternating voltage v = 200 sin 314t is applied to a device which offers an ohmic resistance of 20 Ω. For a half-wave rectifier, calculate the r.m.s. value, and average value of the alternating current. [2 marks]
  7. Q1(f). Explain B-H curve with proper diagram. [2 marks]
  8. Q1(g). With proper diagram explain principle of operation of three phase induction motor. [2 marks]
  9. Q2. Attempt any two parts of the following.
  10. Q2(a). In the circuit shown in Fig. 1. Use nodal analysis to determine Vx (across 3 Ω resistor) & Vy (across 12 Ω resistor). What is power consumed by 6 Ω resistance? [5 marks]
  11. Q2(b). Using mesh analysis, find currents I₁, I₂ & I₃ in the circuit of Fig. 2. Find also the power supplied by each ideal current sources. [5 marks]
  12. Q2(c). Find the Norton equivalent of the circuit (having 9A current source and 9 V voltage 5 source) of Fig. 3 across ab. [5 marks]
  13. Q3. Attempt any two parts of the following.
  14. Q3(a). Derive an expression of resonant frequency for parallel RLC circuit. Also draw its characteristics plot. [5 marks]
  15. Q3(b). A parallel RLC circuit has an adjustable capacitor for changing the resonant frequency from 540 to 1610 KHz. The maximum value of Qo is to be 50. If R=35 Ω, Specify L and Cmax & Cmin. [5 marks]
  16. Q3(c). A three phase, 400 V source (terminal voltage assumed constant independent of load) supplies a load with an equivalent star impedance of (60+j15)Ω/phase through a transmission line of impedance (0.3 +i^(-0))Ω/line (phase). Compute- i. The line current & the load voltage ii. The power, reactive power & VA consumed by the load. [5 marks]
  17. Q4. Attempt any two parts of the following.
  18. Q4(a). A magnetic circuit has a mean core length of 160 cm and uniform cross-section of 5 cm². It has an air-gap of 0.8 mm and is wound with a coil of 1200 turns. Determine the self-inductance of the coil if the core material has a relative permeability of 1600. [5 marks]
  19. Q4(b). The maximum efficiency of a 50 KVA transformer is 97.40% & occurs at 90% of the full load at unity power factor (pf). Calculate the efficiency of the transformer at full load, 0.8 pf. [5 marks]
  20. Q4(c). Explain the principle, operation and working of single-phase transformer with proper diagram. Enlist the advantage and disadvantages of single-phase transformer with respect to autotransformer. [5 marks]
  21. Q5. Attempt any two parts of the following.
  22. Q5(a). The efficiency of a 400 V, 3-phase, 6-pole induction motor draws a line current of 80 A at 0.75 pF at 4% slip is 85%. Calculate the shaft output and shaft torque. [5 marks]
  23. Q5(b). A 4-pole lap-wound d.c. shunt generator has a useful flux per pole of 0.07 Wb. The armature winding consists of 220 turns, each of 0.004 Ω resistance. Calculate the terminal voltage when running at 900 r.p.m. if the armature current is 50 A. [5 marks]
  24. Q5(c). With proper figure explain torque-slip characteristics of three phase induction motor. [5 marks]