Question 61 : For what modulation index, we can expect maximum undistorted power output of a transmitter?
1. 50%
2. 100%
3. 25%
4. 0
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Question 62 : Notch filter is a band pass filter.
1. True
2. False
3.
4.
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Question 63 : A function f(x) is odd, when?
1. f(x) = -f(x)
2. f(x) = f(-x)
3. f(x) = -f(x)f(-x)
4. f(x) = f(x)f(-x)
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Question 64 : Modulation is used to separate differing transmission.
1. True
2. False
3.
4.
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Question 65 : The output stage of television transmitters is most likely to be a __________
1. Grid modulated class C amplifier
2. Grid modulated class A amplifier
3. Plate modulated class C amplifier
4. Plate modulated class A amplifier
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Question 66 : For providing two or more voice circuits on the same carrier, we can use _________
1. SSB
2. ISB systems
3. DSB-SC
4. VSB
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Question 67 : Agreement between communication devices are called ________
1. Transmission medium
2. Channel
3. Protocol
4. Modem
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Question 68 : What will be the value of modulation if we want maximum undistorted transmitted power?
1. 0
2. 1
3. 0.2
4. 0.5
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Question 69 : For a Gaussian process, auto correction also implies _________
1. Statistical dependance
2. Statistical independence
3. Statistical distribution
4. Ergodic process
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Question 70 : What is the role of channel in communication system?
1. acts as a medium to send message signals to its medium
2. converts one form of signal to other
3. allows mixing of signals
4. helps to extract original signal from incoming signal
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