Question 11 : Which of the following is an example of continuous wave analog modulation?
1. PCM
2. DPCM
3. AM
4. ADM
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Question 12 : In automatic gain control of the AM receiver ________
1. gain of the receiver is adjusted
2. gain adjustment depends upon the strength of received signal
3. is an open-loop system
4. gain is received only by stronger signals
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Question 13 : Bandwidth of RF amplifier for a color TV receiver is ________
1. equal to channel width
2. more than channel width
3. less than channel width
4. twice of channel width
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Question 14 : Generation of SSB-SC signal is done by ________
1. Phase discrimination method and Frequency discrimination method
2. Phase discrimination method and Square law modulator
3. Square law modulator and Frequency discrimination method
4. Balanced modulator and Square law modulator
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Question 15 : Mass of any moving system is represented by ________
1. combination of resistance and capacitance
2. a capacitor
3. combination of inductor and capacitor
4. an inductance
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Question 16 : What is the maximum transmission efficiency of an AM signal?
1. 33.33%
2. 60.25%
3. 38.75%
4. 50.25%
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Question 17 : According to Fourier analysis, square wave can be represented as ________
1. fundamental sine wave and even harmonics
2. fundamental sine wave and odd harmonics
3. fundamental sine wave and harmonics
4. fundamental and sub harmonic sine wave
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Question 18 : One of the advantage of using analog communication over digital communication is that in analog communication less transmission bandwidth is required?
1. True
2. False
3.
4.
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Question 19 : Calculate the power in a DSB-SC signal, if the modulation is 60% and power of carrier wave is 600W?
1. 120W
2. 108W
3. 111W
4. 102W
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Question 20 : TRF receivers are used for ________
1. Detection of modulating signal
2. Removal of unwanted signal
3. Mixing modulating signal with unwanted signal
4. Both detection of modulating signal and removal of unwanted signal
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