41. For telegraphy the most commonly used modulation system is A. FSK B. Two tone modulation C. PCM D. Single tone modulation Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option A No explanation is given for this question Let's Discuss on Board
42. The main function of a balanced modulator is to A. Produce balanced modulation of a carrier wave B. Produce 100% modulation C. Suppress carrier signal in order to create a single-sideband or double sideband D. Limit noise picked by a receiver Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option B No explanation is given for this question Let's Discuss on Board
43. In case of frequency modulation, modulating voltage remains constant if the modulating frequency is lowered, then A. Amplitude of distant sidebands decreases B. Amplitude of distant sidebands increases C. Amplitude of distant sidebands remains constant D. Amplitude of distant sidebands first increases, then decreases Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option B No explanation is given for this question Let's Discuss on Board
44. Full duplex operation permits transmission in both directions at the same time. A. True B. False Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option A No explanation is given for this question Let's Discuss on Board
45. The colour of an object is decided by A. The reflected colour B. The wavelength transmitted through it C. Reflected colour for opaque object and wavelength transmitted through it for transparent objects D. None of the above Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option C No explanation is given for this question Let's Discuss on Board
