Question 31 : Telephones send information through wires in form of ________
1. radio signals
2. electrical signal
3. electromagnetic waves
4. microwaves
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Question 32 : Medium which sends information from source to receiver is called ________
1. Transmitter
2. Transducer
3. Loudspeaker
4. Channel
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Question 33 : Amplitude Modulation suffers from ________
1. Side-band Suppression
2. IntraPulse Modulation
3. Cross Modulation
4. Carrier Suppression
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Question 34 : If Output can be represented as linear combination of input then ________
1. The system is linear
2. The system is causal
3. The system is non causal
4. The system is time invariant
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Question 35 : Data transmitted for a given amount of time is called ________
1. Noise
2. Power
3. Frequency
4. Bandwidth
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Question 36 : What is Demodulation?
1. Process of varying one or more properties of a periodic waveform
2. Recovering information from modulated signal
3. Process of mixing a signal with a sinusoid to produce a new signal
4. Involvement of noise
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Question 37 : What do you understand by the term analog communication?
1. A method in which one of the properties of a carrier signal varies in proportion to an instantaneous value of modulation signal
2. A way for data and computer communication
3. A numerical coded communication
4. A suitable method for long distance communication
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Question 38 : The minimum height of antenna required for transmission in terms of ? is ________
1. ^3?⁄₂
2. ^?⁄₄
3. 2?
4. ?
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Question 39 : Why a sinusoidal signal is considered analog?
1. It moves in both positive and negative direction
2. It is positive for one half cycle
3. It is negative for one half cycle
4. It has infinite number of amplitudes in the range of values of the independent variable
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