Modulation
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PHXII15:COMMUNICATION SYSTEMS

356769 The amplitude modulated current is given by
\(i=125[1+0.6 \sin 2900 t] \sin \left(5.50 \times 10^{5} t\right) .\)
The RMS value of carrier current will be

1 \(\frac{{125}}{{\sqrt 2 }}\;A\)
2 \(\frac{{100}}{{\sqrt 2 }}\;A\)
3 \(\frac{{75}}{{\sqrt 2 }}\;A\)
4 \(\frac{{50}}{{\sqrt 2 }}\;A\)
PHXII15:COMMUNICATION SYSTEMS

356770 In frequency modulation

1 The amplitude of modulated wave varies as frequency of carrier wave
2 The frequency of modulated wave varies as amplitude of modulating wave
3 The amplitude of modulated wave varies as amplitude of carrier wave
4 The frequency of modulated wave varies as frequency of modulating wave
PHXII15:COMMUNICATION SYSTEMS

356771 A signal of \(5 \mathrm{kHz}\) frequency is amplitude modulated on a carrier wave of frequency 2 \(\mathrm{MHz}\). The frequencies of the resultant signal is/ are:

1 \(2005kHz\,\,{\rm{and}}\,\,1995kHz\)
2 \(2005kHz,2000kHz\,\,{\rm{and}}\,\,1995kHz\)
3 \(2000kHz\,\,{\rm{and}}\,\,1995kHz\)
4 \(2MHz\) only
PHXII15:COMMUNICATION SYSTEMS

356772 A sinusoidal carrier voltage of amplitude 120 \(V\) is amplitude modulated by another sinusoidal modulating voltage producing \({50 \%}\) modulation. What is the amplitude of the upper and lower side frequencies ?

1 \(10\,V\)
2 \(50\,V\)
3 \(30\,V\)
4 \(20\,V\)
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PHXII15:COMMUNICATION SYSTEMS

356769 The amplitude modulated current is given by
\(i=125[1+0.6 \sin 2900 t] \sin \left(5.50 \times 10^{5} t\right) .\)
The RMS value of carrier current will be

1 \(\frac{{125}}{{\sqrt 2 }}\;A\)
2 \(\frac{{100}}{{\sqrt 2 }}\;A\)
3 \(\frac{{75}}{{\sqrt 2 }}\;A\)
4 \(\frac{{50}}{{\sqrt 2 }}\;A\)
PHXII15:COMMUNICATION SYSTEMS

356770 In frequency modulation

1 The amplitude of modulated wave varies as frequency of carrier wave
2 The frequency of modulated wave varies as amplitude of modulating wave
3 The amplitude of modulated wave varies as amplitude of carrier wave
4 The frequency of modulated wave varies as frequency of modulating wave
PHXII15:COMMUNICATION SYSTEMS

356771 A signal of \(5 \mathrm{kHz}\) frequency is amplitude modulated on a carrier wave of frequency 2 \(\mathrm{MHz}\). The frequencies of the resultant signal is/ are:

1 \(2005kHz\,\,{\rm{and}}\,\,1995kHz\)
2 \(2005kHz,2000kHz\,\,{\rm{and}}\,\,1995kHz\)
3 \(2000kHz\,\,{\rm{and}}\,\,1995kHz\)
4 \(2MHz\) only
PHXII15:COMMUNICATION SYSTEMS

356772 A sinusoidal carrier voltage of amplitude 120 \(V\) is amplitude modulated by another sinusoidal modulating voltage producing \({50 \%}\) modulation. What is the amplitude of the upper and lower side frequencies ?

1 \(10\,V\)
2 \(50\,V\)
3 \(30\,V\)
4 \(20\,V\)
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PHXII15:COMMUNICATION SYSTEMS

356769 The amplitude modulated current is given by
\(i=125[1+0.6 \sin 2900 t] \sin \left(5.50 \times 10^{5} t\right) .\)
The RMS value of carrier current will be

1 \(\frac{{125}}{{\sqrt 2 }}\;A\)
2 \(\frac{{100}}{{\sqrt 2 }}\;A\)
3 \(\frac{{75}}{{\sqrt 2 }}\;A\)
4 \(\frac{{50}}{{\sqrt 2 }}\;A\)
PHXII15:COMMUNICATION SYSTEMS

356770 In frequency modulation

1 The amplitude of modulated wave varies as frequency of carrier wave
2 The frequency of modulated wave varies as amplitude of modulating wave
3 The amplitude of modulated wave varies as amplitude of carrier wave
4 The frequency of modulated wave varies as frequency of modulating wave
PHXII15:COMMUNICATION SYSTEMS

356771 A signal of \(5 \mathrm{kHz}\) frequency is amplitude modulated on a carrier wave of frequency 2 \(\mathrm{MHz}\). The frequencies of the resultant signal is/ are:

1 \(2005kHz\,\,{\rm{and}}\,\,1995kHz\)
2 \(2005kHz,2000kHz\,\,{\rm{and}}\,\,1995kHz\)
3 \(2000kHz\,\,{\rm{and}}\,\,1995kHz\)
4 \(2MHz\) only
PHXII15:COMMUNICATION SYSTEMS

356772 A sinusoidal carrier voltage of amplitude 120 \(V\) is amplitude modulated by another sinusoidal modulating voltage producing \({50 \%}\) modulation. What is the amplitude of the upper and lower side frequencies ?

1 \(10\,V\)
2 \(50\,V\)
3 \(30\,V\)
4 \(20\,V\)
NEET DIGITAL LIBRARY
PHXII15:COMMUNICATION SYSTEMS

356769 The amplitude modulated current is given by
\(i=125[1+0.6 \sin 2900 t] \sin \left(5.50 \times 10^{5} t\right) .\)
The RMS value of carrier current will be

1 \(\frac{{125}}{{\sqrt 2 }}\;A\)
2 \(\frac{{100}}{{\sqrt 2 }}\;A\)
3 \(\frac{{75}}{{\sqrt 2 }}\;A\)
4 \(\frac{{50}}{{\sqrt 2 }}\;A\)
PHXII15:COMMUNICATION SYSTEMS

356770 In frequency modulation

1 The amplitude of modulated wave varies as frequency of carrier wave
2 The frequency of modulated wave varies as amplitude of modulating wave
3 The amplitude of modulated wave varies as amplitude of carrier wave
4 The frequency of modulated wave varies as frequency of modulating wave
PHXII15:COMMUNICATION SYSTEMS

356771 A signal of \(5 \mathrm{kHz}\) frequency is amplitude modulated on a carrier wave of frequency 2 \(\mathrm{MHz}\). The frequencies of the resultant signal is/ are:

1 \(2005kHz\,\,{\rm{and}}\,\,1995kHz\)
2 \(2005kHz,2000kHz\,\,{\rm{and}}\,\,1995kHz\)
3 \(2000kHz\,\,{\rm{and}}\,\,1995kHz\)
4 \(2MHz\) only
PHXII15:COMMUNICATION SYSTEMS

356772 A sinusoidal carrier voltage of amplitude 120 \(V\) is amplitude modulated by another sinusoidal modulating voltage producing \({50 \%}\) modulation. What is the amplitude of the upper and lower side frequencies ?

1 \(10\,V\)
2 \(50\,V\)
3 \(30\,V\)
4 \(20\,V\)
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