Elements of Communication System
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PHXII15:COMMUNICATION SYSTEMS

356737 The attenuation of a signal is compensated by

1 Rectifier
2 Oscillator
3 Modulator
4 Amplifier
PHXII15:COMMUNICATION SYSTEMS

356738 In which of the following remote sensing technique is not used?

1 Forest density
2 Pollution
3 Wetland mapping
4 Medical treatment
PHXII15:COMMUNICATION SYSTEMS

356739 A basic communication system consists of
A. Transmitter
B. Information source
C. Receiver
D. Channel
E. User of Information
Choose the correct sequence in which these are arranged in a basic communication system

1 \(ABCDE\)
2 \(BADCE\)
3 \(BDACE\)
4 \(BEADC\)
NCERT Exemplar
PHXII15:COMMUNICATION SYSTEMS

356740 What should be the maximum acceptance angle at the aircore interface of an optical fibre if \(n_{1}\) and \(n_{2}\) are the redfractive indices of the core and the cladding, respectively?

1 \(\sin ^{-1}\left(n_{2} / n_{1}\right)\)
2 \(\sin ^{-1} \sqrt{n_{1}^{2}-n_{2}^{2}}\)
3 \(\left[\tan ^{-1} \dfrac{n_{2}}{n_{1}}\right]\)
4 \(\left[\tan ^{-1} \dfrac{n_{1}}{n_{2}}\right]\)
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PHXII15:COMMUNICATION SYSTEMS

356737 The attenuation of a signal is compensated by

1 Rectifier
2 Oscillator
3 Modulator
4 Amplifier
PHXII15:COMMUNICATION SYSTEMS

356738 In which of the following remote sensing technique is not used?

1 Forest density
2 Pollution
3 Wetland mapping
4 Medical treatment
PHXII15:COMMUNICATION SYSTEMS

356739 A basic communication system consists of
A. Transmitter
B. Information source
C. Receiver
D. Channel
E. User of Information
Choose the correct sequence in which these are arranged in a basic communication system

1 \(ABCDE\)
2 \(BADCE\)
3 \(BDACE\)
4 \(BEADC\)
NCERT Exemplar
PHXII15:COMMUNICATION SYSTEMS

356740 What should be the maximum acceptance angle at the aircore interface of an optical fibre if \(n_{1}\) and \(n_{2}\) are the redfractive indices of the core and the cladding, respectively?

1 \(\sin ^{-1}\left(n_{2} / n_{1}\right)\)
2 \(\sin ^{-1} \sqrt{n_{1}^{2}-n_{2}^{2}}\)
3 \(\left[\tan ^{-1} \dfrac{n_{2}}{n_{1}}\right]\)
4 \(\left[\tan ^{-1} \dfrac{n_{1}}{n_{2}}\right]\)
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PHXII15:COMMUNICATION SYSTEMS

356737 The attenuation of a signal is compensated by

1 Rectifier
2 Oscillator
3 Modulator
4 Amplifier
PHXII15:COMMUNICATION SYSTEMS

356738 In which of the following remote sensing technique is not used?

1 Forest density
2 Pollution
3 Wetland mapping
4 Medical treatment
PHXII15:COMMUNICATION SYSTEMS

356739 A basic communication system consists of
A. Transmitter
B. Information source
C. Receiver
D. Channel
E. User of Information
Choose the correct sequence in which these are arranged in a basic communication system

1 \(ABCDE\)
2 \(BADCE\)
3 \(BDACE\)
4 \(BEADC\)
NCERT Exemplar
PHXII15:COMMUNICATION SYSTEMS

356740 What should be the maximum acceptance angle at the aircore interface of an optical fibre if \(n_{1}\) and \(n_{2}\) are the redfractive indices of the core and the cladding, respectively?

1 \(\sin ^{-1}\left(n_{2} / n_{1}\right)\)
2 \(\sin ^{-1} \sqrt{n_{1}^{2}-n_{2}^{2}}\)
3 \(\left[\tan ^{-1} \dfrac{n_{2}}{n_{1}}\right]\)
4 \(\left[\tan ^{-1} \dfrac{n_{1}}{n_{2}}\right]\)
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PHXII15:COMMUNICATION SYSTEMS

356737 The attenuation of a signal is compensated by

1 Rectifier
2 Oscillator
3 Modulator
4 Amplifier
PHXII15:COMMUNICATION SYSTEMS

356738 In which of the following remote sensing technique is not used?

1 Forest density
2 Pollution
3 Wetland mapping
4 Medical treatment
PHXII15:COMMUNICATION SYSTEMS

356739 A basic communication system consists of
A. Transmitter
B. Information source
C. Receiver
D. Channel
E. User of Information
Choose the correct sequence in which these are arranged in a basic communication system

1 \(ABCDE\)
2 \(BADCE\)
3 \(BDACE\)
4 \(BEADC\)
NCERT Exemplar
PHXII15:COMMUNICATION SYSTEMS

356740 What should be the maximum acceptance angle at the aircore interface of an optical fibre if \(n_{1}\) and \(n_{2}\) are the redfractive indices of the core and the cladding, respectively?

1 \(\sin ^{-1}\left(n_{2} / n_{1}\right)\)
2 \(\sin ^{-1} \sqrt{n_{1}^{2}-n_{2}^{2}}\)
3 \(\left[\tan ^{-1} \dfrac{n_{2}}{n_{1}}\right]\)
4 \(\left[\tan ^{-1} \dfrac{n_{1}}{n_{2}}\right]\)