Q. A direct radiating cone type loudspeaker attenuates :

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Q. The advantage of pulse modulation is

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Q. Sparking affects amplitude modulation.

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Q. For low impedance SAW filter the most suitable material for substrate of SAW filter is

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Q. An angle modulated signal is expressed by fa(t) = cos (2 x 10⁸ πt) + 75 sin (2 x 10³ πt). The peak frequency deviation of the carrier is

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Q. The amplitude of a modulated RF aerial current is 6 A on the peaks of modulation and 4 A on the troughs of modulation. The value of carrier amplitude is

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Q. In practical commercial AM system channel bandwidth is

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Q. The currents fed to the two dipoles of turnstile antenna are

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Q. Armstrong modulator generates

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Q. The diagonal clipping in Amplitude Demodulation using (envelope detector) can be avoided if Rc time constant of the envelope detector satisfies the following condition here ω is message bandwidth and ωc is carrier frequency both in rad sec,

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Q. To select one out of N equally probable events, the number of bits required is

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Q. What is the frequency of audio modulation?

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Q. The RF section of a radio transmit generally consists of

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Q. In cell communication

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Q. A ground wave travels along surface of ground.

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Q. In narrowband FM, the modulation index is

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Q. A single-sideband (SSB) signal contains 3 kW. The power content of the carrier is __________ kW.

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Q. Waves of frequencies higher than 30 MHz penetrate the atmosphere.

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Q. The storage capacity of audio CD is 540 Mb per side.

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Q. In case of a low level AM transmitter, the amplifier modulated stage must be

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