Q. In single tone AM modulation, the transmission efficiency for m = 1 is

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Q. A remote control of TV uses a 10 bit word. The maximum number of total commands it can transmit is

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Q. Telecine equipment in a TV studio consists of

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Q. TV signal strength when expressed in dB m has the reference of

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Q. A sinusoidal voltage amplitude modulates a carrier of peak value 5 kV. Each side band has an amplitude of 500 V. The modulation index is

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Q. Kell factor is about

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Q. AM amplifier having noise figure of 20 dB and available power gain of 15 dB is followed by a mixer circuit having noise figure of 9 dB. The overall noise figure as referred to input in dB is

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Q. Which one of the following is non-resonant antenna?

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Q. The efficiency of using a binary system for selection of 1 out of 13 equally probable events is

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Q. The most suitable method for detecting a modulated signal g(t) = (3 to 6 cos 2πfmt) cos 2πfct is

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Q. A total of 16 equally probable events exist. If it is required to select one out of them, the number of required bits is

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Q. When modulation index of an AM wave is increased from 0.5 to 1, the transmitted power

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Q. Quantizing error occurs in

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Q. In audio cassettes the width of each recording track is

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Q. The most commonly used transistor amplifier circuit is

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Q. When energy is fed into open wire transmission line the energy may get dissipated due to

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Q. Loudness control gives

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Q. A mobile telephone has a range of about

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Q. If transmitted power is 75 kW, the field strength at 30 km distance will be about

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Q. The time required for horizontal blanking is 16% of that for each horizontal line. If horizontal time is 63.5 μs, the horizontal blanking time for each line is about

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