Question 11 : The beam-width becomes narrower on
1. Increasing frequency
2. Increasing antenna size
3. Increasing frequency & antenna size
4. None of the mentioned
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Question 12 : In continuous ARQ will pullback uses _____ system.
1. Half duplex
2. Full duplex
3. Simplex
4. None of the mentioned
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Question 13 : Mechanism contributing to a reduction in efficiency is called as
1. Amplitude tapering
2. Blockage
3. Edge diffraction
4. All of the mentioned
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Question 14 : Path loss Ls is dependent on
1. Signal power
2. Effective area
3. Wavelength
4. Antenna size
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Question 15 : Antenna gain ______ as effective area increases.
1. Increases
2. Decreases
3. Remains same
4. None of the mentioned
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Question 16 : Example of block code is
1. Hamming code
2. Reed-solomon code
3. Repetition code
4. All of the mentioned
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Question 17 : Space loss occurs due to a decrease in
1. Electric field strength
2. Efficiency
3. Phase
4. Signal power
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Question 18 : Check-sum scheme has
1. Check bits
2. Parity bits
3. Longitudinal redundancy bits
4. All of the mentioned
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Question 19 : The space window region ranges from
1. 1GHz to 10 GHz
2. 10GHz to 100GHZ
3. 5GHz to 50GHz
4. 1MHz to 10MHz
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Question 20 : Effective radiated power of an isotropic radiator can be given as a product of
1. Radiated power and received power
2. Effective area and physical area
3. Transmitted power and transmitting gain
4. Receiving power and receiving gain
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