Basic Electrical Engineering 2026 — MAKAUT · ES-EE101 · Mid Sem PYQ with solutions

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Maulana Abul Kalam Azad University of Technology

Solutions

29 answers across 3 groups

Try each question first, then open it to check your answer.

Group AVery Short Answer Type Question · answer any 10 · 1 mark each

  1. I

    What is the formula for output voltage for Buck converter?

    Free sample

    Answer: Vo=DVinV_o = D V_{in}

    Explanation

    In a step-down (buck) converter, the average output voltage VoV_o is the product of the duty cycle DD (where 0<D<10 < D < 1) and the input DC voltage VinV_{in}.

  2. II

    What is the full form of MCCB?

  3. III

    Draw the Norton's equivalent circuit

  4. IV

    What is the Power factor of electric incandescent bulb?

  5. V

    What is the condition for maximum efficiency of transformer?

  6. VI

    Explain the law based on which a DC generator works.

  7. VII

    A single-phase full bridge inverter has a dc voltage source Vs = 230 V. Find the rms value of the fundamental component of output voltage.

  8. VIII

    How the capacity of a battery is expressed?

  9. IX

    What is meant by short and open circuits?

  10. X

    The r.m.s. value of a sinusoidal A.C. current is equal to its value at an angle of _______ degrees.

  11. XI

    Why SC test is generally performed on HV side of a transformer?

  12. XII

    What is mechanical rectifier related to DC machine?

Group BShort Answer Type Question · answer any 3 · 5 marks each

  1. 2

    What is meant by power converter?

  2. 3

    Explain what is meant by series resonance of a series RLC ac circuit. How do you define of such circuit?

  3. 4

    Calculate the resistance of 100 m length of a wire having a uniform cross-sectional area of 0.1 mm2 if the wire is made of manganin having a resistivity of 50 × 10-8 Ω-m.

  4. 5

    Show that the power consumed in a pure inductance is zero.

  5. 6

    A. d.c. Shunt generator supplies a load of 50KW at 500 V. Calculate the emf generated if the armature and shunt field resistances are 0.25 ohm and 125 ohm respectively.

Group CLong Answer Type Question · answer any 3 · 15 marks each

  1. 7(a)

    What is MCCB and how does it differ from MCB?

    4 marks
  2. 7(b)

    What is earthing? Why earthing is provided?

    4 marks
  3. 7(c)

    An alkaline cell is discharged at a steady current of 4 A for 12 hours, the average terminal voltage being 1.2 V. To restore to its original state of charge, a steady current of 3 A for 20 hours is required, the average terminal voltage being 1.44 V. Calculate watt-hour efficiency.

    7 marks
  4. 8(a)

    Draw the phasor diagram of a transformer on load and in lagging power factor

    7 marks
  5. 8(b)

    The maximum efficiency of a 100 kVA, single phase transformer is 95% and occurs at 90% of full load at 0.85 pf. If the leakage impedance of the transformer if 5%, find the voltage regulation at rated load 0.8 pf lagging.

    8 marks
  6. 9(a)

    Define and explain the following: (i) time period (ii) amplitude (iii) phase difference.

    6 marks
  7. 9(b)

    A 50-μF capacitor is connected across a 230-V, 50-Hz supply. Calculate

    • (a)
      the reactance offered by the capacitor
    • (b)
      the maximum current and
    • (c)
      the r.m.s. value of the current drawn by the capacitor.
    Show answer to question 9(b)9 marks
  8. 10(a)

    Derive the EMF equation of a transformer.

    4 marks
  9. 10(b)

    A 8 kVA, 440/2000 V, 50 Hz single phase transformer gave the following test results: No load test: 400 V, 0.8 A, 80 W Short circuit test: 50 V, 3 A, 20W Calculate

    • (i)
      the magnetizing current and the component corresponding to Iron losses at normal voltage and frequency,
    • (ii)
      the efficiency on full load at unity power factor,
    • (iii)
      the secondary terminal voltage on full load at unity power factor.
    Show answer to question 10(b)8 marks
  10. 10(c)

    Draw the equivalent circuit of a transformer refer to the primary side.

    3 marks
  11. 11(a)

    A discharged battery is put on charge at 5 A for 3.5 hours at a mean charging voltage of 13.5 V. It is then discharged in 6 hours at constant terminal voltage of 12 V through a resistance of R ohms. Calculate the value of R for an A-H efficiency of 85%. Also calculate the watt-hour efficiency.

    8 marks
  12. 11(b)

    A battery is charged keeping the voltage constant. The current initially was 10.5 A and finally 2.5 A in a period of 8 hours. The battery was discharged at a constant current of 6 A for 7 hours. Calculate ampere-hour efficiency of this battery.

    7 marks

About this paper

The MAKAUT Basic Electrical Engineering (ES-EE101) 2026 Mid Sem previous year question paper, set in semester 1. Download the verified PDF or read it online, then check your answers against the worked solutions above.

Common paper for 8 branches

Every branch listed gets the same questions. Pick a branch to see its other papers.

Why solve Basic Electrical Engineering PYQs?

Frequently asked questions

5 questions

What is the subject code for Basic Electrical Engineering?

ES-EE101 is the MAKAUT subject code for Basic Electrical Engineering.

Which exam is this Basic Electrical Engineering question paper from?

The MAKAUT 2026 Mid Sem exam, semester 1. A student shared it, and it was checked before publishing.

Which branches is this Basic Electrical Engineering paper for?

It's a common paper for 8 B.Tech branches: Civil Engineering, Computer Science and Engineering, Computer Science and Engineering (Data Science), Electronics and Communication Engineering, Electrical Engineering, Information Technology, Computer Science and Engineering (Artificial Intelligence and Machine Learning) and Mechanical Engineering. Every branch gets the same questions.

Where can I find more ES-EE101 question papers?

On the Basic Electrical Engineering subject page, which collects every year's papers along with notes and the syllabus.

Are there solutions for this paper?

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