Q. A trigonometric function is synonyms to

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Q. The autocorrelation function of the white noise is

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Q. In a FM signal, the modulation index increases, then the power

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Q. Higher order TDM levels are obtained by

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Q. Assertion (A): In AM, use of SSB reduces the power and bandwidth requirement

Reason (R): A balanced modulator produces AM with carrier suppressed

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Q. Limiter is not essential in the following detector

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Q. A receiver has poor selectivity. It will also have poor

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Q. The depth of modulation is doubled in FM system then, the power transmitted

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Q. Ground wave can be used for communication upto

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Q. A Marconi antenna

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Q. When large amount of power is required, a push pull amplifier is designed for operation as

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Q. Why does a FM radio station perform better than and AM station radiating the same actual power?

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Q. In cable TV local programmes can be telecast at any frequency.

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Q. In amplitude modulation, the magnitude of side bands is

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Q. If fs be the signal frequency and fi be the intermediate frequency then image frequency is given by

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Q. In VHS format the width of tape is

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Q. The minimum viewing angle of resolution of human eye is (D is iris opening and λ is wavelength of light)

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Q. In FM,

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Q. The power density spectrum of noise voltage of resistor R can be expressed as

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Q. If k denotes Boltzmann's constant, the rms value of thermal noise voltage is proportional to

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