Fundamentals of Electronics Engineering Unit 5 – Fundamentals of Communication Engineering: important questions for AKTU
Unit 5 (Fundamentals of Communication Engineering) questions that AKTU repeats most often. This unit carries about 25 marks per paper. Start with the repeated questions, then the most asked topics.
Most repeated Unit 5 questions
- An Audio frequency signal 10Sin(6π×400t) is used to amplitude modulate a carrier of 25sin(4π×10⁵t). Calculate: (i) Modulation Index (ii) Amplitude of each side band (iii) Total power delivered to the load of 2KΩ (iv) Bandwidth (v) Transmission efficiency (10 marks, 2022, Amplitude Modulation) – also asked in 2022, 2023, 2024, 2025, 2026
- 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) – also asked in 2022, 2023, 2024, 2026
- 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) – also asked in 2022, 2023, 2024, 2026
Most important Unit 5 topic
- Amplitude Modulation (Unit 5: Fundamentals of Communication Engineering) – asked 26 times in 2022, 2023, 2024, 2025, 2026
Most asked Unit 5 topics
- Amplitude Modulation – asked 26 times
- Wireless Communication Overview – asked 14 times
- Signal Representation and Analysis
More 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)
Unit 5 syllabus topics
- Signal Representation and Analysis
- Amplitude Modulation
- Wireless Communication Overview
- Satellite and Radar Communication