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Basic Electrical — Major (End Semester) 2021 question paper

MMMUT Electronics and Communication Engineering previous year question paper for Basic Electrical (BEE-101), semester 1, Major (End Semester) 2021. All 23 questions are listed below, each with a written answer on Nexsus.

Paper details

  • Subject: Basic Electrical (BEE-101)
  • Branch: Electronics and Communication Engineering
  • Semester: 1
  • Exam: Major (End Semester) 2021
  • Questions: 23

Questions asked in Basic Electrical Major (End Semester) 2021

  1. QQ.1. Draw the phosor diagram of single phase transformer for lagging load.
  2. QQ.1. A 4 pole, 50 Hz, 3 phase Induction motor operates on 1440 pm. Calculate its percentage slip?
  3. QQ.1. State and explain Kirchoff's laws.
  4. QQ.1. Define open circuit test of single phase transformer.
  5. QQ.1. State Ohm's Law. Mention one limitation.
  6. QQ.1. Define RMS value and average value.
  7. QQ.1. Calculate the form factor and perk-factor of square wave.
  8. QQ.2. Attempt any Two parts of the following.
  9. QQ.2(a). Derive maximum power transfer theorem for resistive load and determine efficiency in case of maximum power transfer. [2 marks]
  10. QQ.2(b). State superposition theorem and calculate I, from the Fig.1 given below using superposition. All values of resistances are in ohm. [2 marks]
  11. QQ.2(c). State Norton's theorem and draw equivalent circuit. Differentiate between Thevenin's theorem and Norton's Theorem. [2 marks]
  12. QQ.3. Attempt any Two parts of the following.
  13. QQ.3(a). The voltage across the load is vt)- 60 sin(ct) and the current through the load in the direction of voltage drop is i(t) = 1.5 sin(cot+60) then find the complex and apparent power. [5 marks]
  14. QQ.3(b). In an R-L-C parallel circuit the current through the resistor, inductor (pure), and capacitor (pure) are 20A, 15A and 40A respectively. What is the Current from the supply? Draw the phasor diagram. [5 marks]
  15. QQ.3(c). Define following terms in case of R-L-C series circuit: Resonance frequency, Band-width, Quality factor. [5 marks]
  16. QQ.4. Attempt any Two parts of the following.
  17. QQ.4(a). Define following terms: Magnetic flux density, MMF, Reluctance. [5 marks]
  18. QQ.4(b). Explain B-H curve. Also define Hysteresis and eddy current loss with their expressions. [5 marks]
  19. QQ.4(c). Explain working principle of Auto transformer. And also explain its advantages over two winding transformer. [5 marks]
  20. QQ.5. Attempt any Two parts of the following.
  21. QQ.5(a). Explain the working principle of DC generator. And also explain its construction with neat diagram. [5 marks]
  22. QQ.5(b). Explain the working principle of single phase induction motor. And explain its classification. [5 marks]
  23. QQ.5(c). Explain classification of the DC motor with their required equations and neat circuit diagrams. [5 marks]