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WorksheetsACOM AM 1
Total questions: 10
Worksheet time: 5mins
In Single tone amplitude modulation message signal contains ________
consists of only one frequency component
contains a large number of frequency components
contains no frequency components
contains infinite number of frequency components
AM spectrum consists of ________
Carrier frequency
Upper sideband
Lower sideband
Carrier frequency with both upper and lower sideband
Amplitude Modulated wave is ________
Sum of carrier and modulating wave
Product of carrier and modulating wave
Difference of carrier and modulating wave
Sum of carrier and its product with modulating wave
AM waves is represented by which equation?
[1 + m(t)].c(t)
[1 – m(t)].c(t)
[1 + m(t)].2c(t)
[1 + 2m(t)].c(t)
Modulation is also called detection.
True
False
What is Amplitude Modulation?
Change in amplitude of carrier according to modulating signal amplitude
Change in frequency of carrier according to modulating signal amplitude
Change in amplitude of carrier according to modulating signal frequency
Change in amplitude of modulating signal according to carrier signal amplitude
In amplitude modulation frequency and phase of carrier ________
varies simultaneously
varies alternately
initially varies but become same after sometime
remains constant
Envelope of AM wave has the same shape as the message of baseband signal.
True
False
Overmodulation results in?
Distortion
Weakens signal
Strengthens the signal
provides immunity to noise
For getting modulation index equal to 1, carrier amplitude should ________
exceed signal amplitude
be equal to signal amplitude
be lesser than signal amplitude
be equal to 0
