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ENEE 403Bachelor in Electrical Engineering · Semester 71 Paper Available

Power Electronics

Past examination question papers and complete curriculum syllabus for Power Electronics (ENEE 403), Bachelor in Electrical Engineering Semester 7 under Institute of Engineering (IOE), Tribhuvan University.

Sem 7 Subjects (4)View Full Semester Overview →
ENEE 401High Voltage EngineeringENEE 402Transmission and DistributionENEE 403Power ElectronicsENEE 404Utilization of Electrical Energy
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Past Question Papers (PDF)

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Note: This question paper file (5th sem) was archived from an IOE exam session for the common Power Electronics curriculum.

5th-sem_Power Electronics.pdf

IOE Past Examination Paper

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Document information: This past examination paper is identified as an IOE/TU academic document and was cataloged from a public Google Drive archive. This independent website did not create the examination paper and is not affiliated with TU or IOE.

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Most Frequently Asked Questions

Top recurring IOE board exam questions for Power Electronics with verified mark schemes, formula notation, and recurrence frequency.

Showing 40 of 40 top repeated questions
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Year-wise & Session-wise Exam Papers

Complete questions from each exam session (Regular & Back exams from 2082 to 2069) for Power Electronics. Click any session paper to expand.

Showing 92 questions across 16 exam session papers
Institute of Engineering • 2082 Chaitra Board Examination
Q1[8 Marks]Power Electronic Devices
(a) Explain the working of thyristor with the help of V-I curve and explain the meaning of latching current and holding current. (b) The reverse recovery time of a diode is and the rate of fall of the diode current decay is . For a softness factor of storage charge and peak reverse current.
Q2[8 Marks]Three Phase AC to DC Converters
a) Explain the operation of three phase single way controlled rectifier with highly inductive load. Derive the expression of average and RMS value of output voltage. Draw the waveforms of output voltage for and calculate average value of output voltage. b) Explain the operation of a single phase AC voltage controller. Derive the expression for RMS value of the output voltage as the function of firing angle.
Q3[8 Marks]Inverters📐 Diagram in Paper
(a) Explain the operation of a three phase inverter in conduction mode. Illustrate with a suitable circuit diagram and the related waveforms of phase and line voltage of output voltage. (b) Explain the operation of single-phase AC voltage controller with R-L load.
Q4[8 Marks]AC Voltage Controller📐 Diagram in Paper
(a) Explain the operation of single-phase step down cycloconverter with necessary circuit diagram and waveform. (b) A single-phase square wave inverter has a resistive load of . The DC input voltage is with mid-point grounded. Find (i) rms value of output voltage (ii) Peak value of fundamental component of output voltage (iii) output power.
Q5[8 Marks]AC Voltage Regulators and Cycloconverters
Derive the expression for average value of the output voltage.

Curriculum Syllabus & Course Topics

Sourced from TU curriculum portal
Full Syllabus (PDF)
Chapter-wise Units & Micro-Syllabus Topics (7 Units)

  1. 1. Power Semiconductor Devices and Characteristics

    6

  2. 2. Thyristors and Gating/Commutation Techniques

    6

  3. 3. Phase-Controlled Rectifiers (AC to DC Converters)

    9

  4. 4. DC-DC Converters (Buck, Boost, Buck-Boost Choppers)

    8

  5. 5. Inverters (Single-Phase and Three-Phase PWM Inverters)

    8

  6. 6. AC Voltage Regulators and Cycloconverters

    5

  7. 7. Applications in Motor Drives and Power Supplies

    6

Examination Scheme & Marks Distribution

Evaluation Structure

  • Final Board Theory Exam: 60 Marks (Pass mark: 24)
  • Internal Assessment: 40 Marks (Pass mark: 16)
  • Practical / Lab Exam: 25 or 50 Marks (Continuous lab evaluation + viva, where applicable)

* This is the general current IOE 60/40 scheme; verify course-specific details in the syllabus above.

Exam Preparation Guidelines

  • Review the available past examination paper to understand question styling, typical derivation topics, and marks allocation.
  • Practice drawing labeled circuit schematics, deriving transfer functions, and showing systematic mathematical steps.
  • Structure answers with labeled diagrams, concise bullet points, and highlight final answers in numerical solutions.
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Curriculum Syllabus & Marking Scheme