Q. If output power of a radio receiver is doubled, its volume is increased by __________ dB.

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Q. Human ear can detect sound intensities of the order of

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Q. In Pulse Code Modulation system

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Q. The colour of an object is decided by

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Q. Commercial Frequency deviation of FM is

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Q. For telegraphy the most commonly used modulation system is

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Q. If S represents the carrier synchronization at the receiver and ρ represents the bandwidth efficiency, then the correct statement for the coherent binary PSK is

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Q. An FM radio receiver which is tuned to a 91.6 MHz broadcast station may receive an image frequency of __________ MHz.

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Q. Circular polarization

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Q. When the length of antenna is a whole wavelength

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Q. Which of the following is an indirect way of generating FM?

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Q. PAM stands for

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Q. The maximum power output of a standard A earth station over the total band allocated to satellite communication is about

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Q. In EM waves, polarization

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Q. In practical commercial FM system, channel bandwidth is

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Q. Skip distance depends on time of day and angle of incidence.

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Q. It is found that a ship to ship communication suffers from fading. This can be avoided by using

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Q. If sampling is done at the rate of 10 kHz. The bandwidth required is

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Q. In case of frequency modulation, modulating voltage remains constant if the modulating frequency is lowered, then

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Q. Under ordinary circumstances, impulse noise can be reduced in

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