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Power Electronics important questionsMost repeated in SPPU papers

These 18 questions appeared in more than one SPPU Power Electronics paper we have: 8 papers, from Oct 2023 to Nov 2025. The most-asked come first. Each one links to the papers it was asked in.

All Power Electronics papers and notes

Repeated questions

Endsem questions (17)

  1. 5×asked

    Draw and explain Single phase semi converter feeding R load with output voltage and current wave forms. Also derive output average and rms voltage equation.

    Nov 2025 ·May 2025 ·Nov 2024 ·May 2024 ·Nov 2023

  2. 5×asked

    Explain working of single-phase full bridge voltage source Inverter connected to RL load with neat circuit diagram. Draw output voltage and current waveforms.

    Nov 2025 ·May 2025 ·Nov 2024 ·May 2024 ·Nov 2023

  3. 4×asked

    Draw and explain working of Three phase semi controlled converter connected to R Load with neat circuit diagram and waveforms for firing angle  = 30° and  =0°

    Nov 2025 ·May 2025 ·Nov 2024 ·May 2024

  4. 4×asked

    Explain working of two stage AC Voltage regulator with RL Load. Draw output voltage waveforms.

    Nov 2025 ·May 2025 ·Nov 2024 ·May 2024

  5. 4×asked

    Explain working of three phase six step voltage source inverter in 180º mode of operation. For star connected load draw output voltage waveforms. Show devices conducting in each step.

    May 2025 ·Nov 2024 ·May 2024 ·Nov 2023

  6. 3×asked

    Describe working of circulating current type single phase dual converter with waveforms. 2

    Nov 2025 ·May 2025 ·Nov 2024

  7. 3×asked

    Draw single phase AC Voltage regulator with R Load and output voltage waveforms.

    Nov 2025 ·May 2025 ·May 2024

  8. 3×asked

    List different harmonic elimination techniques used in inverter. Explain any two methods in detail. 

    May 2025 ·Nov 2024 ·May 2024

  9. 3×asked

    State different voltage control techniques used in single phase inverter. Elaborate any one method in detail.

    May 2025 ·Nov 2024 ·May 2024

  10. 2×asked

    Compare multi-pulse and multilevel inverters.

    Nov 2025 ·May 2024

  11. 2×asked

    What is necessity of using Multilevel Inverters? Draw circuit diagram of H bridge multilevel Inverter. .

    Nov 2025 ·May 2024

  12. 2×asked

    Describe working of single phase semi converter with RL load. Draw waveforms of load voltage, load current.

    May 2025 ·May 2024

  13. 2×asked

    Explain Sinusoidal Pulse width modulation with necessary waveforms.

    May 2025 ·Nov 2023

  14. 2×asked

    A single phase fully controlled bridge converter is connected to R Load of 10  The input voltage to the bridge is 230 V. Calculate. i) Average and RMS load voltage ii) Average and RMS load current Firing angle is 60 degrees. 2

    Nov 2024 ·May 2024

  15. 2×asked

    Explain operation AC voltage regulator with an output waveform for RL load. Derive the expression for average and RMS output voltage. Daw the waveform for  = 60°

    Nov 2024 ·Nov 2023

  16. 2×asked

    Explain sinusoidal PWM technique for inverters. How voltage and freq. control is achieved?

    Nov 2024 ·May 2024

  17. 2×asked

    Explain working of three phase full controlled converter with RL Load. Draw output voltage and current waveforms for  =30°. Derive the expression for average and RMS output voltage.

    Nov 2024 ·Nov 2023

Insem questions (1)

  1. 2×asked

    Explain four mode operation of TRIAC.

    Aug 2025 ·Oct 2024

Questions count as repeated when their wording matches closely across papers. Numericals that depend on a figure are left out, since the figure changes from paper to paper.