Related InterviewSolutions

• Which among the following can be detected by an envelope detector?(a) Low frequency AM waves(b) Very low frequency AM waves(c) Envelope detectors cannot detect AM waves(d) High frequency AM wavesI have been asked this question in an online interview.Origin of the question is Communication Systems in section Communication Systems of Physics – Class 12
• Which of the following is not part of the detector system?(a) Rectifier(b) Envelope detector(c) Amplifier(d) AM waveThe question was posed to me in an interview.The origin of the question is Communication Systems in division Communication Systems of Physics – Class 12
• Which of the following is not a medium of transmission?(a) Microwave system(b) Wire(c) Free space(d) Fiber optic cableThe question was posed to me in an international level competition.The query is from Communication Systems topic in portion Communication Systems of Physics – Class 12
• What is the frequency range for a speech signal?(a) 20 Hz to 20 kHz(b) 20 kHz to 20 MHz(c) 300 Hz to 3100 Hz(d) 30 Hz to 310 HzI had been asked this question by my college professor while I was bunking the class.The doubt is from Communication Systems in portion Communication Systems of Physics – Class 12
• Identify the one that is not required in the process of production of amplitude modulated wave?(a) Square law device(b) Rectifier(c) Bandpass filter(d) Combination of message and carrier signalI have been asked this question during an internship interview.My question comes from Communication Systems topic in portion Communication Systems of Physics – Class 12
• How can the noise be reduced in AM signal?(a) Increasing amplitude(b) Increasing wavelength(c) Increasing bandwidth(d) Increasing frequency deviationI got this question in a job interview.My question is taken from Communication Systems topic in portion Communication Systems of Physics – Class 12
• What happens in a frequency modulated wave?(a) Frequency varies with time(b) Amplitude varies with time(c) Both frequency and amplitude varies with time(d) Both frequency and amplitude are constantI have been asked this question in a national level competition.Query is from Communication Systems in portion Communication Systems of Physics – Class 12
• Which of the following is false?(a) Bandpass filters filter out the unwanted frequencies(b) The transmitting antenna transmits the signal over large distances(c) Attenuation should be reduced for a signal(d) The modulated signal is quite strongI got this question during an interview.The doubt is from Communication Systems topic in section Communication Systems of Physics – Class 12
• A bandpass filter rejects direct current.(a) True(b) FalseI had been asked this question in an online interview.I would like to ask this question from Communication Systems in division Communication Systems of Physics – Class 12
• PAM stands for pulse attenuation modulation.(a) True(b) FalseThis question was addressed to me by my college director while I was bunking the class.This interesting question is from Communication Systems topic in chapter Communication Systems of Physics – Class 12