Modulation
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PHXII15:COMMUNICATION SYSTEMS

356747 In Amplitude modulation

1 The amplitude of the carrier wave varies in accordance with the amplitude of the modulating signal
2 The amplitude of carrier wave remains constant, frequency changes in accordance with the modulating signal
3 The amplitude of carrier wave varies in accordance with the frequency of the modulating signal
4 The amplitude changes in accordance with the wavelength of the modulating signal
PHXII15:COMMUNICATION SYSTEMS

356748 Identify the mathematical expression for amplitude modulated wave

1 \(A_{c} \sin \left\{\omega_{c} t+\phi+k_{2} v_{m}(t)\right\}\)
2 \(A_{\mathrm{c}} \sin \left[\left\{\omega_{\mathrm{c}}+k_{1} V_{m}(t)\right\} t+\phi\right]\)
3 \(A_{\mathrm{c}} v_{m}(t) \sin \left(\omega_{c} t+\phi\right)\)
4 \(\left\{A_{c}+k_{2} v_{m}(t)\right\} \sin \left(\omega_{c} t+\phi\right)\)
NCERT Exemplar
PHXII15:COMMUNICATION SYSTEMS

356749 An audio signal consists of two distinct sounds : one a human speech signal in the frequency band of \(200\;Hz\,\,{\rm{to}}\,\,2700\;Hz\), while the other is a high frequency music signal in the frequency band of \(10200\;Hz\,\,{\rm{to}}\,\,15200\;Hz\). The ratio of the AM signal band width required to send both the signals together to the AM signal bandwidth required to send just the human speech is:

1 6
2 5
3 3
4 2
JEE - 2016
PHXII15:COMMUNICATION SYSTEMS

356750 The amplitude of \(15 \sin (1000 \pi t)\) is modulated by \(10 \sin (4 \pi t)\) signal. The amplitude modulated signal contains frequencies of
A. \(500\;Hz\)
B. \(2\;Hz\)
C. \(250\;Hz\)
D. \(489\;Hz\)
E. \(502\;Hz\)
Choose the correct answer from the options given below

1 A and B only
2 A and D only
3 A and C only
4 A, D and E only
JEE - 2023
PHXII15:COMMUNICATION SYSTEMS

356751 An audio signal \(25 \sin 2 \pi(1400 t)\) amplitude modulates \(80 \sin 2 \pi\left(10^{5} t\right)\). The two side band frequencies are

1 \(98.6kHz,101.4kHz\)
2 \(92.5kHz,105.5kHz\)
3 \(94kHz,102.5kHz\)
4 \(96kHz,106kHz\)
NEET DIGITAL LIBRARY
PHXII15:COMMUNICATION SYSTEMS

356747 In Amplitude modulation

1 The amplitude of the carrier wave varies in accordance with the amplitude of the modulating signal
2 The amplitude of carrier wave remains constant, frequency changes in accordance with the modulating signal
3 The amplitude of carrier wave varies in accordance with the frequency of the modulating signal
4 The amplitude changes in accordance with the wavelength of the modulating signal
PHXII15:COMMUNICATION SYSTEMS

356748 Identify the mathematical expression for amplitude modulated wave

1 \(A_{c} \sin \left\{\omega_{c} t+\phi+k_{2} v_{m}(t)\right\}\)
2 \(A_{\mathrm{c}} \sin \left[\left\{\omega_{\mathrm{c}}+k_{1} V_{m}(t)\right\} t+\phi\right]\)
3 \(A_{\mathrm{c}} v_{m}(t) \sin \left(\omega_{c} t+\phi\right)\)
4 \(\left\{A_{c}+k_{2} v_{m}(t)\right\} \sin \left(\omega_{c} t+\phi\right)\)
NCERT Exemplar
PHXII15:COMMUNICATION SYSTEMS

356749 An audio signal consists of two distinct sounds : one a human speech signal in the frequency band of \(200\;Hz\,\,{\rm{to}}\,\,2700\;Hz\), while the other is a high frequency music signal in the frequency band of \(10200\;Hz\,\,{\rm{to}}\,\,15200\;Hz\). The ratio of the AM signal band width required to send both the signals together to the AM signal bandwidth required to send just the human speech is:

1 6
2 5
3 3
4 2
JEE - 2016
PHXII15:COMMUNICATION SYSTEMS

356750 The amplitude of \(15 \sin (1000 \pi t)\) is modulated by \(10 \sin (4 \pi t)\) signal. The amplitude modulated signal contains frequencies of
A. \(500\;Hz\)
B. \(2\;Hz\)
C. \(250\;Hz\)
D. \(489\;Hz\)
E. \(502\;Hz\)
Choose the correct answer from the options given below

1 A and B only
2 A and D only
3 A and C only
4 A, D and E only
JEE - 2023
PHXII15:COMMUNICATION SYSTEMS

356751 An audio signal \(25 \sin 2 \pi(1400 t)\) amplitude modulates \(80 \sin 2 \pi\left(10^{5} t\right)\). The two side band frequencies are

1 \(98.6kHz,101.4kHz\)
2 \(92.5kHz,105.5kHz\)
3 \(94kHz,102.5kHz\)
4 \(96kHz,106kHz\)
Join With Us for More Updates
PHXII15:COMMUNICATION SYSTEMS

356747 In Amplitude modulation

1 The amplitude of the carrier wave varies in accordance with the amplitude of the modulating signal
2 The amplitude of carrier wave remains constant, frequency changes in accordance with the modulating signal
3 The amplitude of carrier wave varies in accordance with the frequency of the modulating signal
4 The amplitude changes in accordance with the wavelength of the modulating signal
PHXII15:COMMUNICATION SYSTEMS

356748 Identify the mathematical expression for amplitude modulated wave

1 \(A_{c} \sin \left\{\omega_{c} t+\phi+k_{2} v_{m}(t)\right\}\)
2 \(A_{\mathrm{c}} \sin \left[\left\{\omega_{\mathrm{c}}+k_{1} V_{m}(t)\right\} t+\phi\right]\)
3 \(A_{\mathrm{c}} v_{m}(t) \sin \left(\omega_{c} t+\phi\right)\)
4 \(\left\{A_{c}+k_{2} v_{m}(t)\right\} \sin \left(\omega_{c} t+\phi\right)\)
NCERT Exemplar
PHXII15:COMMUNICATION SYSTEMS

356749 An audio signal consists of two distinct sounds : one a human speech signal in the frequency band of \(200\;Hz\,\,{\rm{to}}\,\,2700\;Hz\), while the other is a high frequency music signal in the frequency band of \(10200\;Hz\,\,{\rm{to}}\,\,15200\;Hz\). The ratio of the AM signal band width required to send both the signals together to the AM signal bandwidth required to send just the human speech is:

1 6
2 5
3 3
4 2
JEE - 2016
PHXII15:COMMUNICATION SYSTEMS

356750 The amplitude of \(15 \sin (1000 \pi t)\) is modulated by \(10 \sin (4 \pi t)\) signal. The amplitude modulated signal contains frequencies of
A. \(500\;Hz\)
B. \(2\;Hz\)
C. \(250\;Hz\)
D. \(489\;Hz\)
E. \(502\;Hz\)
Choose the correct answer from the options given below

1 A and B only
2 A and D only
3 A and C only
4 A, D and E only
JEE - 2023
PHXII15:COMMUNICATION SYSTEMS

356751 An audio signal \(25 \sin 2 \pi(1400 t)\) amplitude modulates \(80 \sin 2 \pi\left(10^{5} t\right)\). The two side band frequencies are

1 \(98.6kHz,101.4kHz\)
2 \(92.5kHz,105.5kHz\)
3 \(94kHz,102.5kHz\)
4 \(96kHz,106kHz\)
For More Updates join with Us
PHXII15:COMMUNICATION SYSTEMS

356747 In Amplitude modulation

1 The amplitude of the carrier wave varies in accordance with the amplitude of the modulating signal
2 The amplitude of carrier wave remains constant, frequency changes in accordance with the modulating signal
3 The amplitude of carrier wave varies in accordance with the frequency of the modulating signal
4 The amplitude changes in accordance with the wavelength of the modulating signal
PHXII15:COMMUNICATION SYSTEMS

356748 Identify the mathematical expression for amplitude modulated wave

1 \(A_{c} \sin \left\{\omega_{c} t+\phi+k_{2} v_{m}(t)\right\}\)
2 \(A_{\mathrm{c}} \sin \left[\left\{\omega_{\mathrm{c}}+k_{1} V_{m}(t)\right\} t+\phi\right]\)
3 \(A_{\mathrm{c}} v_{m}(t) \sin \left(\omega_{c} t+\phi\right)\)
4 \(\left\{A_{c}+k_{2} v_{m}(t)\right\} \sin \left(\omega_{c} t+\phi\right)\)
NCERT Exemplar
PHXII15:COMMUNICATION SYSTEMS

356749 An audio signal consists of two distinct sounds : one a human speech signal in the frequency band of \(200\;Hz\,\,{\rm{to}}\,\,2700\;Hz\), while the other is a high frequency music signal in the frequency band of \(10200\;Hz\,\,{\rm{to}}\,\,15200\;Hz\). The ratio of the AM signal band width required to send both the signals together to the AM signal bandwidth required to send just the human speech is:

1 6
2 5
3 3
4 2
JEE - 2016
PHXII15:COMMUNICATION SYSTEMS

356750 The amplitude of \(15 \sin (1000 \pi t)\) is modulated by \(10 \sin (4 \pi t)\) signal. The amplitude modulated signal contains frequencies of
A. \(500\;Hz\)
B. \(2\;Hz\)
C. \(250\;Hz\)
D. \(489\;Hz\)
E. \(502\;Hz\)
Choose the correct answer from the options given below

1 A and B only
2 A and D only
3 A and C only
4 A, D and E only
JEE - 2023
PHXII15:COMMUNICATION SYSTEMS

356751 An audio signal \(25 \sin 2 \pi(1400 t)\) amplitude modulates \(80 \sin 2 \pi\left(10^{5} t\right)\). The two side band frequencies are

1 \(98.6kHz,101.4kHz\)
2 \(92.5kHz,105.5kHz\)
3 \(94kHz,102.5kHz\)
4 \(96kHz,106kHz\)
NEET DIGITAL LIBRARY
PHXII15:COMMUNICATION SYSTEMS

356747 In Amplitude modulation

1 The amplitude of the carrier wave varies in accordance with the amplitude of the modulating signal
2 The amplitude of carrier wave remains constant, frequency changes in accordance with the modulating signal
3 The amplitude of carrier wave varies in accordance with the frequency of the modulating signal
4 The amplitude changes in accordance with the wavelength of the modulating signal
PHXII15:COMMUNICATION SYSTEMS

356748 Identify the mathematical expression for amplitude modulated wave

1 \(A_{c} \sin \left\{\omega_{c} t+\phi+k_{2} v_{m}(t)\right\}\)
2 \(A_{\mathrm{c}} \sin \left[\left\{\omega_{\mathrm{c}}+k_{1} V_{m}(t)\right\} t+\phi\right]\)
3 \(A_{\mathrm{c}} v_{m}(t) \sin \left(\omega_{c} t+\phi\right)\)
4 \(\left\{A_{c}+k_{2} v_{m}(t)\right\} \sin \left(\omega_{c} t+\phi\right)\)
NCERT Exemplar
PHXII15:COMMUNICATION SYSTEMS

356749 An audio signal consists of two distinct sounds : one a human speech signal in the frequency band of \(200\;Hz\,\,{\rm{to}}\,\,2700\;Hz\), while the other is a high frequency music signal in the frequency band of \(10200\;Hz\,\,{\rm{to}}\,\,15200\;Hz\). The ratio of the AM signal band width required to send both the signals together to the AM signal bandwidth required to send just the human speech is:

1 6
2 5
3 3
4 2
JEE - 2016
PHXII15:COMMUNICATION SYSTEMS

356750 The amplitude of \(15 \sin (1000 \pi t)\) is modulated by \(10 \sin (4 \pi t)\) signal. The amplitude modulated signal contains frequencies of
A. \(500\;Hz\)
B. \(2\;Hz\)
C. \(250\;Hz\)
D. \(489\;Hz\)
E. \(502\;Hz\)
Choose the correct answer from the options given below

1 A and B only
2 A and D only
3 A and C only
4 A, D and E only
JEE - 2023
PHXII15:COMMUNICATION SYSTEMS

356751 An audio signal \(25 \sin 2 \pi(1400 t)\) amplitude modulates \(80 \sin 2 \pi\left(10^{5} t\right)\). The two side band frequencies are

1 \(98.6kHz,101.4kHz\)
2 \(92.5kHz,105.5kHz\)
3 \(94kHz,102.5kHz\)
4 \(96kHz,106kHz\)