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Communication Systems MCQ II Solutions
- Q15.10: An audio signal of 15kHz frequency cannot be transmitted over long distances without modulation because
- Q15.10: An audio signal of 15kHz frequency cannot be transmitted over long distances without modulation because
- Q15.11: Audio sine waves of 3 kHz frequency are used to amplitude modulate a carrier signal of 1.5 MHz. Which of the following statements are true?
- Q15.11: Audio sine waves of 3 kHz frequency are used to amplitude modulate a carrier signal of 1.5 MHz. Which of the following statements are true?
- Q15.12: A TV trasmission tower has a height of 240 m. Signals broadcast from this tower will be received by LOS communication at a distance of (assume the radius of earth to be $6.4 \times 10^6$ m)
- Q15.12: A TV trasmission tower has a height of 240 m. Signals broadcast from this tower will be received by LOS communication at a distance of (assume the radius of earth to be (6.4 \times 10^{6}) m)
- Q15.13: The frequency response curve (Fig. 15.2) for the filter circuit used for production of AM wave should be
- Q15.13: The frequency response curve (Fig. 15.2) for the filter circuit used for production of AM wave should be
- Q15.14: In amplitude modulation, the modulation index $m$, is kept less than or equal to 1 because
- Q15.14: In amplitude modulation, the modulation index m, is kept less than or equal to 1 because
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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