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Engineering FE Engineering Common Sem 1 Basic Electrical and Electronics Engineering May 2023 Question Paper - Mumbai University | munotes

Basic Electrical And Electronics Engineering Question Paper, May 2023.pdf
HAS · 272 KB · 1 May 2025

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Older exam Dec 2022 - R16 Semester-end · Basic Electrical and Electronics Engineering → Newer exam Dec 2023 Semester-end · Basic Electrical and Electronics Engineering →

Questions asked in this paper

  1. Q1 Question number 1 is compulsory li. Solve any three of the remaining questions
    • iv. Figures to the right indicate full marks Attempt any Four of the following. 20
    • a) Find the average value of waveform shown in figure-1 below
    • b) Derive the relation between line voltage and phase voltage, line current and phase current for
    • c) Determine the currents I1, and using mesh analysis for circuit shown in figure-2 below
    • d) Explain working principle of transformer with neat diagram
    • e) What is the function of the commutator in a DC generator and DC motor?
  2. Q2 Attempt all of the following 20 marks
    • a) Determine current through 5 Q resistor for circuit shown in figure-3 below using Superposition
    • b) connected to 100V DC supply draws a current of 10A while the same coil when connected to 100V 50 Hz AC supply draws a current of 5A. Calculate parameters of the coil and power factor. Also calculate power consumed by the coil
  3. Q3 Attempt all of the following. 20 marks
    • a) Determine the value of load resistance for maximum power transfer for the circuit shown in figure-4 below. Also find the value of maximum power
    • b) Develop step by step the equivalent circuit of the transformer referred to any one side
  4. Q4 Attempt all of the following. 20 marks
    • a) Two impedances 20 < - 45 Q and 30 < 30 Q are connected in series across certain AC supply and resulting current is 10A. If the supply voltage remains the same, calculate supply current when two impedances are connected in parallel
    • b) Three identical impedances each with resistance of 10 Q and reactance of 20 Q are connected in star across three phase 440V AC supply. Determine phase and line currents active, reactive and apparent power and readings of two Wattmeters connected to measure the power
  5. Q5 Attempt all of the following. 20 marks
    • a) A 1000/200V, 50 Hz, single phase transformer gave the following test results: circuit parameters referred to HV side li. on half load and 0.8 pf lagging
    • iii. Regulation on full load and 0.8 pf leading
    • b) Describe types of power in three phase circuits. Explain two wattmeter method of power measurement in three phase circuit with circuit diagram and phasor diagram for three phase balanced star connected load with lagging pf
  6. Q6 Attempt all of the following. 20 marks
    • a) Classify DC motors. Draw schematic diagrams of each. Explain the significance of back emf
    • b) Compare series and parallel resonance. A series resonant circuit has R=10 Q, L=0.01H and Determine the resonant frequency, quality factor and bandwidth

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