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Communication Systems VSA Solutions
- Q15.15(i): Which of the following would produce analog signals and which would produce digital signals? (i) A vibrating tuning fork.
- Q15.15(i): Which of the following would produce analog signals and which would produce digital signals? (i) A vibrating tuning fork.
- Q15.15(ii): Which of the following would produce analog signals and which would produce digital signals? (ii) Musical sound due to a vibrating sitar string.
- Q15.15(ii): Which of the following would produce analog signals and which would produce digital signals? (ii) Musical sound due to a vibrating sitar string.
- Q15.15(iii): Which of the following would produce analog signals and which would produce digital signals? (iii) Light pulse.
- Q15.15(iii): Which of the following would produce analog signals and which would produce digital signals? (iii) Light pulse.
- Q15.15(iv): Which of the following would produce analog signals and which would produce digital signals? (iv) Output of NAND gate.
- Q15.15(iv): Which of the following would produce analog signals and which would produce digital signals? (iv) Output of NAND gate.
- Q15.16: Would sky waves be suitable for transmission of TV signals of 60 MHz frequency?
- Q15.16: Would sky waves be suitable for transmission of TV signals of 60 MHz frequency?
- Q15.17: Two waves $A$ and $B$ of frequencies 2 MHz and 3 MHz, respectively are beamed in the same direction for communication via sky wave. Which one of these is likely to travel longer distance in the ionosphere before suffering total internal reflection?
- Q15.17: Two waves (A) and (B) of frequencies 2 MHz and 3 MHz, respectively are beamed in the same direction for communication via sky wave. Which one of these is likely to travel longer distance in the ionosphere before suffering total internal reflection?
- Q15.18: The maximum amplitude of an A.M. wave is found to be 15 V while its minimum amplitude is found to be 3 V. What is the modulation index?
- Q15.18: The maximum amplitude of an A.M. wave is found to be 15 V while its minimum amplitude is found to be 3 V. What is the modulation index?
- Q15.19: Compute the LC product of a tuned amplifier circuit required to generate a carrier wave of 1 MHz for amplitude modulation.
- Q15.19: Compute the (LC) product of a tuned amplifier circuit required to generate a carrier wave of 1 MHz for amplitude modulation.
- Q15.20: Why is a AM signal likely to be more noisy than a FM signal upon transmission through a channel?
- Q15.20: Why is a AM signal likely to be more noisy than a FM signal upon transmission through a channel?
Other Exercises for CBSE - Class 12 Physics Communication Systems
Chapters in CBSE - Class 12 Physics
- Electric Charges and Fields
- Electrostatic Potential and Capacitance
- Current Electricity
- Moving Charges and Magnetism
- Magnetism and Matter
- Electromagnetic Induction
- Alternating Current
- Electromagnetic Waves
- Ray Optics and Optical Instruments
- Wave Optics
- Dual Nature of Radiation and Matter
- Atoms
- Nuclei
- Semiconductor Electronics
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Bhestan, Surat
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I have over 5 years of experience teaching Class 12 CBSE students in Physics, Chemistry, and Mathematics, following the latest CBSE and NCERT curriculum and examination pattern. My teaching approach focuses on building strong conceptual foundations while developing problem-solving skills required for board examinations and competitive-level questions. I explain every topic in a structured and student-friendly manner, starting from basic concepts and gradually moving towards application-based and higher-order questions. Special emphasis is given to NCERT theory, important derivations, numerical problems, diagrams, formulas, reactions, and previous-year examination patterns. Over the years, I have helped many Class 12 students improve their academic performance, with several students scoring 90% and above in their board examinations. I regularly identify individual learning gaps and provide targeted practice, revision, doubt-solving, and exam-oriented guidance. My goal is not only to help students score high marks but also to make Physics, Chemistry, and Mathematics clear, logical, and easy to understand through consistent practice and personalized guidance.
Shivam sir is an amazing teacher who spends enough time helping us understand topics in a fun and easy way. He also gives us practical examples making chemistry seem easier!
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Koramangala 8th Block, Bangalore
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I believe mathematics becomes easy once it is learned the right way. Currently pursuing a PhD in Mathematics with 7 years of teaching experience for JEE Main & Advanced, CBSE, AS/A Levels, IB HL/SL, and IGCSE, State Boards. I focus on conceptual understanding and problem-solving rather than rote learning. My goal is to help students think mathematically, build confidence, and truly enjoy the subject with patience and clarity.
Great teacher he's great at explaining topics, he is fast at teaching so you should ask all doubts immediately he gives lots of homework but still recommended.
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Katira Maharaja Hata, Arrah
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I have successfully taught hundreds of Class 12 students across multiple boards, including CBSE, ICSE, IGCSE, International Curricula, and State Boards. My expertise spans Mathematics & Physics for students from science, commerce, and arts streams, with a strong focus on clarity and conceptual understanding. Alongside my individual teaching, I manage a coaching institute dedicated to preparing students from Class 10 to 12 and guiding IIT JEE aspirants with personalized strategies for success. Please note: The fees displayed on my profile apply to one-on-one personalized sessions. For details on group or batch classes, please refer to my monthly fee structure or contact me directly.
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I bring with me 17 years of diverse experience in the pharmaceutical industry along with academic expertise, combining strong practical knowledge with a passion for teaching. I am dedicated to simplifying complex concepts and delivering them in an engaging manner, ensuring that students not only gain subject knowledge but also develop the skills, confidence, and potential required to achieve academic excellence and become industry-ready professionals.
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Rich experience of 34 years of teaching mathematics to 11th and 12th science and commerce classes. experience of tuting student aspiring for JEE, CET exams
