Q. If e = 10 sin(10⁸ t + 3 sin 10³ t) then the modulation index is

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Q. Frequency modulation consists in

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Q. Pulse modulation is often used in

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Q. Thermal noise has a power spectral density which is quite uniform upto frequencies in the order of

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Q. A telephone channel requires a bandwidth of about

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Q. For a given carrier wave, maximum undistorted power is transmitted when value of modulation is

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Q. As per Shannon-Hartley theorem, a noise less Gaussian channel has

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Q. DVD uses

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Q. Fourier analysis indicate that a square wave can be represented as

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Q. The characteristic impedance of a twin wire feeder used for TV signals is about

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Q. In a FM receiver, amplitude limiter

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Q. A buffer amplifier is

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Q. Leak type bias is used in plate modulated class C amplifier to

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Q. The direction of rotation of a CD is

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Q. Which of the following is not considered as a useful quantity in comparing noise performance of receivers?

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Q. Oscillator crystal is made of

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Q. An FM signal has modulating frequency fm and maximum frequency deviation of δ. The bandwidth will be nearly equal to

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Q. In a cellular communication system, path loss between transmitter and receiver is due to

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Q. Full duplex operation-permits transmission in both directions at the same time.

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Q. In a TV receiver antenna the length of reflector rod

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