An AM signal is represented by x(t) = (30 + 2Sin(700πt)) Cos(2πt x 10^2t)V. What is the value of modulation index?(a) 0.7(b) 0.066(c) 0.341(d) 0.916This question was addressed to me in class test.Question is from Power Relations in AM Waves in section Amplitude Modulation of Analog Communications

An AM signal is represented by x(t) = (30 + 2Sin(700πt)) Cos(2πt x 1

1.	An AM signal is represented by x(t) = (30 + 2Sin(700πt)) Cos(2πt x 10^2t)V. What is the value of modulation index?(a) 0.7(b) 0.066(c) 0.341(d) 0.916This question was addressed to me in class test.Question is from Power Relations in AM Waves in section Amplitude Modulation of Analog Communications
Answer» Right OPTION is (b) 0.066 Explanation: Given equation can be WRITTEN as 30(1 + 0.066 SIN(700πt)). Comparing it with general AM equation, s(t) = Ac(1 + mAm cos(WMT)) cos(wct), Where, Ac = Amplitude of CARRIER Signal, Am = Amplitude of Message Signal m=Modulation Index So modulation index(m) = 0.066.

Discussion

No Comment Found

Related InterviewSolutions

What is Amplitude Modulation?(a) Change in amplitude of carrier according to modulating signal amplitude(b) Change in frequency of carrier according to modulating signal amplitude(c) Change in amplitude of carrier according to modulating signal frequency(d) Change in amplitude of modulating signal according to carrier signal amplitudeI had been asked this question in class test.My question is based upon Frequency Domain Description topic in portion Amplitude Modulation of Analog Communications
In amplitude modulation frequency and phase of carrier ________(a) varies simultaneously(b) varies alternately(c) initially varies but become same after sometime(d) remains constantThe question was posed to me during an online exam.I'd like to ask this question from Frequency Domain Description in portion Amplitude Modulation of Analog Communications
Envelope of AM wave has the same shape as the message of baseband signal.(a) True(b) FalseThe question was posed to me during an interview for a job.My question comes from Frequency Domain Description in portion Amplitude Modulation of Analog Communications
When aliasing takes place?(a) Sampling signals less than Nyquist Rate(b) Sampling signals more than Nyquist Rate(c) Sampling signals equal to Nyquist Rate(d) Sampling signals at a rate which is twice of Nyquist RateI have been asked this question during an online exam.My question is taken from Frequency Domain Description topic in chapter Amplitude Modulation of Analog Communications
Why the Synchronous detection of AM signals is considered as a disadvantage?(a) Needs additional system for synchronization of carrier(b) Receiver is available at cheap prices(c) Needs less number of system as estimated for generation of carrier(d) Receiver is not complexI had been asked this question in quiz.Query is from Frequency Domain Description in section Amplitude Modulation of Analog Communications
Which devices did we use for AM Demodulation?(a) Envelope detector and Square law demodulator(b) PLL detector and Foster-Seeley discriminator(c) Ratio detector and Slope detector(d) Only quadrature detectorThis question was posed to me during an interview.This intriguing question originated from Frequency Domain Description in chapter Amplitude Modulation of Analog Communications
Square Law modulators ________(a) used for amplitude modulation(b) have non linear current-voltage characteristics(c) have non linear current-voltage characteristics as well as used for Amplitude Modulation(d) used for frequency modulationThe question was asked in class test.My question is taken from Frequency Domain Description in chapter Amplitude Modulation of Analog Communications
What do you understand by low level AM?(a) Output power is low(b) Modulation is done at high power of carrier and modulating signal(c) Collector Modulation Method is low level AM(d) Output power is highThis question was addressed to me in an online quiz.I'd like to ask this question from Frequency Domain Description in division Amplitude Modulation of Analog Communications
What do you understand by high level AM?(a) Output power is low(b) Modulation is done at high power of carrier and modulating signal(c) No need to boost the carrier and modulating signal(d) Modulation is done at low power of carrier and modulating signalI got this question in an interview for job.I would like to ask this question from Frequency Domain Description in division Amplitude Modulation of Analog Communications
For Amplitude Modulation, Emitter modulator ________(a) Operates in class C mode(b) Has a low efficiency(c) Output power is high(d) Operates in class B modeI had been asked this question in an online interview.This interesting question is from Single Tone Modulation topic in section Amplitude Modulation of Analog Communications

An AM signal is represented by x(t) = (30 + 2Sin(700πt)) Cos(2πt x 10^2t)V. What is the value of modulation index?(a) 0.7(b) 0.066(c) 0.341(d) 0.916This question was addressed to me in class test.Question is from Power Relations in AM Waves in section Amplitude Modulation of Analog Communications

Discussion

No Comment Found

Related InterviewSolutions

Reply to Comment