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NEET Practice Questions (MCQs) with Answers & Solutions

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Coaxial cable offers a band width approximately -------MHz

A. 1 B. 20 C. 250 D. 1000

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Modulation is used to................

A. reduce the band width used B. seperate the transmission of different areas C. ensure that information may be transmitted to long distance D. allow the use of practical antennas

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An antenna can transmit ------- radiation with more efficiency.

A. low frequency B. high frequency C. long wave length D. None of these

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For an amplitude modulated wave, the maximum amplitude is found to be 9V while the minimum amplitude is found to be 3V. The modulation index is

A. 100% B. 75% C. 50% D. 25%

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AM is used for broadcasting because

A. it is more noise innumerable than other modulation system B. it requires less transmitting power compared with other system C. it's are avoids receiver complexity.... D. No other modulation system can provide the necessary band width faithful transmission

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Frequencies in the UHF range normally propagation by means of

A. ground waves B. sky waves C. surface waves D. space waves

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The area to be covered for T.V telecast is doubled. Then the height to transmitting antenna will have to be

A. doubled B. halved C. quadrupled D. kept unchanged

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Which of the following is related to telecommunication

A. X-rays B. r-rays C. sound wave D. microwaves

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Suppose the amplitade of modulated wave equal to the signal amplitude. Then modulatation is

A. 10% B. 25% C. 50% D. 100%

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Space waves are generally propagated in

A. UHF B. VHF C. HF D. None of these

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