Question 21 : Which effect is observed when FM reception deteriorates abruptly due to noise?
1. Threshold effect
2. Capture effect
3. Noise effect
4. Limit effect
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Question 22 : How an AM radio station increase its signal-to-noise ratio?
1. by increasing its modulation index
2. by decreasing its modulation index
3. by maintaining a constant modulation index
4. by increasing the frequency
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Question 23 : How can we derive FM from PM?
1. by integrating the modulating signal before applying to the PM oscillator
2. by integrating signal out of the PM oscillator
3. by differentiating the modulating signal before applying to the PM oscillator
4. by differentiating signal out of the PM oscillator
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Question 24 : What is the modulation index for getting maximum power in amplitude modulated system?
1. 1
2. ¹⁄₂
3. 0.3
4. 0.8
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Question 25 : What will be the effect on power in amplitude modulated system if we increase the modulation index?
1. increases
2. becomes twice
3. remains same
4. decreases
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Question 26 : If we compared to the USB, the power in the LSB is ________
1. one-fourth of USB
2. twice of USB
3. same as USB
4. half of USB
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Question 27 : Only audio can be sent using Amplitude Modulation.
1. True
2. False
3.
4.
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Question 28 : What is the full form of PEP in communication?
1. Peak Efficiency Power
2. Peak Envelope Power
3. Peak Efficiency Product
4. Peak Envelope Power
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