Fundamentals of Electronics Engineering Unit 5 – Fundamentals of Communication Engineering: AKTU previous year questions
40 AKTU questions from Unit 5 (Fundamentals of Communication Engineering) asked in 2022–2026, tagged by marks, year and topic. In short: about 25 marks of every paper come from this unit; the most asked topic is Amplitude Modulation (26 times); 36 questions came back in a later year. The latest ones are listed below; on the page you can filter them by 2-mark or long questions, topic and repeats.
Unit 5 previous year questions
- Define modulation index for AM wave. State the concept of over, under modulation. (2 marks, 2026, Amplitude Modulation)
- A 320W carrier is simultaneously modulated by two audio waves with percentage modulation of 45 and 60 respectively. What is the sideband power radiated? (2 marks, 2026, Amplitude Modulation)
- (i) Define Modulation and also Listed the need of modulation in communication. (ii) When an AM broadcast transmitter is 60% modulated then its antenna current is 10A.what will be the antenna current when the modulation depth is Increased by 70%. (7 marks, 2026, Amplitude Modulation)
- Derive an expression for Amplitude Modulated wave. An audio frequency signal 20sin (2π ×500t) is used to amplitude modulated a carrier of 40sin (2π ×105t). Calculate (i) Modulation index (ii) Amplitude and frequency of each side band (iii) Bandwidth. (7 marks, 2026, Amplitude Modulation)
- What is Wireless Communication? Explain the basic principles of Satellite Communication system with the help of block diagram. Also state the advantages and disadvantages of Wireless Communication. (7 marks, 2026, Wireless Communication Overview)
- In digital wireless systems, how does frequency reuse improve spectral efficiency? (2 marks, 2025, Wireless Communication Overview)
- A 600 watt carrier power is modulated to depth of 80%, calculate the total power in the modulated wave. (2 marks, 2025, Amplitude Modulation)
- Draw the block diagram of a communication system and explain the function of each block. (7 marks, 2025, Amplitude Modulation)
- An AM wave is represented by the expression: V = 5 (1 + 0.6 cos 6280 t) sin 211 × 10⁴ t volts (i) What are the minimum and maximum amplitudes of the AM wave? (ii) What frequency components are contained in the modulated wave and what is the amplitude of each component? (7 marks, 2025, Amplitude Modulation)
- What is need of modulation? Define AM (Amplitude modulation) with wave forms and derive expiration for modulation index of AM. (7 marks, 2025, Amplitude Modulation)
- A sinusoidal carrier voltage of frequency 1 MHz and amplitude 100 volts is amplitude modulated by the sinusoidal voltage of frequency 5 kHz producing 50% modulation. Calculate the frequency and amplitude of lower and upper sideband terms. (7 marks, 2025, Amplitude Modulation)
- Explain basic elements of Satellite communication system with help of suitable diagrams. (7 marks, 2025, Wireless Communication Overview)
Most asked Unit 5 topics
- Amplitude Modulation – asked 26 times
- Wireless Communication Overview – asked 14 times
- Signal Representation and Analysis
Unit 5 question pattern
- 2-mark questions: 13 asked in 2022–2026
- 7-mark questions: 21 asked in 2022–2026
- 10-mark questions: 6 asked in 2022–2026
- About 25 marks from Unit 5 in every paper
- 36 questions were asked again in a later year
Unit 5 questions year by year
- 2026: 5 Unit 5 questions asked (25 marks across that year's papers)
- 2025: 8 Unit 5 questions asked (46 marks across that year's papers)
- 2024: 8 Unit 5 questions asked (46 marks across that year's papers)
- 2023: 8 Unit 5 questions asked (46 marks across that year's papers)
- 2022: 11 Unit 5 questions asked (70 marks across that year's papers)