| 1. | Communication is a process of ? | |
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Transfer of information
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Transfer of circuit
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Transfer of channel
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Transfer of energy
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Report Question| 2. | Modulation is a primarily accomplished to ? | |
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Produce sidebands
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Transmit audio-frequency signals over long distances
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Mix two waves of different frequencies
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Improve transmission efficiency
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| 3. | Which of the following statement is false, Modulation is used to ? | |
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Reduce the bandwidth used
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Separate differing transmissions
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Ensure that intelligence may be transmitted over long distances
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Allow the use of practicable antennas
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| 4. | In Amplitude modulation ? | |
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Carrier signal amplitude with the amplitude of modulating signal
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Carrier signal amplitude varies with the frequency of modulating signal
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Carrier signal frequency varies with the frequency of modulating signal
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Carrier signal frequency varies with the amplitude of modulating signal
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| 5. | In AM: ? | |
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Amplitude of carrier signal, varies with amplitude of modulating signal
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Frequency of carrier signal varies with frequency of modulating signal
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Amplitude of carrier signal varies with frequency of modulating signal
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Frequency of carrier signal varies with amplitude of modulating signal
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| 6. | In Am, Modulation index is given by the ? | |
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Ratio of peak value of modulating signal to that of the carrier signal
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Ratio of peak value of carrier signal to that of the modulating signal
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Ratio of frequency of carrier signal to the peak value of modulating
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none
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| 7. | Value of modulation index for maximum power in AM ? | |
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Should be 0
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Should be 0.5
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Should be 1
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Should be 0.7
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| 8. | In AM, Modulation index is given by the ? | |
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Ratio of peak value of carrier signal to that of the modulating signal
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Ratio of peak value of modulating signal to that of the carrier signal
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Ratio of frequency of carrier signal to the peak value of modulating signal
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Ratio of frequency of modulating signal to the peak value of carrier signal
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| 9. | In an AM wave, and the percentage of Modulation is ? | |
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20.00
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33.33
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50.00
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75.00
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| 10. | In AM when the modulation index is 0.5, the maximum power pt, (where Pc is carrier power) is equal to ? | |
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Pc
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2.5Pc
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2 Pc
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1.125 Pc
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