While tuning in a certain broad cast station with a receiver, we are actuallyA. Varying the local oscillator frequencyB. Varying the frequency of the radio signal to be picked upC. Tuning the antennaD. None of these

While tuning in a certain broad cast station with a receiver, we are a

1.	While tuning in a certain broad cast station with a receiver, we are actuallyA. Varying the local oscillator frequencyB. Varying the frequency of the radio signal to be picked upC. Tuning the antennaD. None of these
Answer» Correct Answer - A

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The need for doing modulation isA. to increase the intensity of auido signalB. to decrease the intensity of audio signalC. to transmit audio signal to large distancesD. to increase the frequency of the audio signal
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Which of the following frequencies will be suitable for beyond the horizon communication using sky waves ?A. 10 kHzB. 10 MHzC. 1 GHzD. 1000 GHz
Among the follwing frequencies one will be suitable for beyond-the horizon communication using sky waves isA. `10 kHz`B. `10 MHz`C. `1 GHz`D. `1000 GHz`
In frequency modulationA. Frequency of `CW` remains constant but amplitude changes in accoradance with modulating wave frequencyB. Frequency of `CW` changes in accordance with the modulating wave frequency but the amplitude also changes.C. Frequency of `CW` changes in accordance with the modulating wave frequency but the amplitude remains constant.D. Frequency of `CW` changes in accordance with the amplitude of modulating wave amplitude
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While tuning in a certain broad cast station with a receiver, we are actuallyA. Varying the local oscillator frequencyB. Varying the frequency of the radio signal to be picked upC. Tuning the antennaD. None of these

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