Home
Class 11
PHYSICS
The amplitude of carrier wave is 12 . ...

The amplitude of carrier wave is 12 . For modulation index of 50% the amplitude of modulating signal is _____________V.

A

3

B

6

C

12

D

9

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • COMMUNICATION SYSTEMS

    TARGET PUBLICATION|Exercise Evaluation Test|15 Videos
  • COMMUNICATION SYSTEMS

    TARGET PUBLICATION|Exercise Critical Thinking|34 Videos
  • ELECTRONS AND PHOTONS

    TARGET PUBLICATION|Exercise Evaluation Test|19 Videos

Similar Questions

Explore conceptually related problems

An audio signal represented as 25 sin 2pi ( 2000 t) amplitude modulated by a carrier wave : 60 sin 2pi (100,000)t . The modulation index of the modulated signal is

The maximum and minimum amplitude of an amplitude modulated wave is 16V and 8V respectively. The modulation index for this amplitude modulated wave is "x"xx10^(-2) . The value of x is "_____"

The efficient transmission of signals is achieved by superimposing electrical audio signals on a high frequency carrier wave (the process is known as modulation). When the amplitude of high frequency carrier wave is changed in accordance with the intensity of modulating signal, it is called amplitude modulation. The extent to which the amplitude of carrier wave is changed by the signal is described by modulation factor. It is given as m="Amplitude change of carrier wave"/"Amplitude of unmodulated carrier wave" Let a carrier wave is represented by V_c=V_c cos omega_ct Let the modulation factor be m, the maximum change in amplitude of carrier wave is mV_c So, modulating signal can be represented as v_m=mV_c cosomega_mt So, the amplitude of modulated wave is =V_c+mV_c cosomega_m t Using this value, the instantaneous voltage of modulated wave is E=V_c cos omega_c t+ (mV_c)/2 cos (omega_c+omega_m)t + (mV_c)/2 cos (omega_c-omega_m ) t The above wave contains three frequencies namely, f_c, f_c+f_m and f_c-f_m . The frequencies f_c+f_m and f_c-f_m are called side band frequencies , USB and LSB respectively. The fraction of total power carried by side band frequencies is

If V_(c) is amplitude of carrier wave in AM transmitter where modulation factor is m then amplitude of side bands can be

An amplitude modulated wave is as shown in the figure. What is the percentage of modulation ?

Both amplitude modulation (AM) and frequency modulation (FM) are used for radio broadcasting. The amplitude of the high frequency carrier wave is varied or modulated in accordance with the variations in the amplitude of the audio signals that are to be transmitted, in te process of amplitude modulation in frequency modulation te amplitude of the carrier remains constant but its frequency is varied inn accordance withh the audio signal. Reception with AM signals is in general is affected by interference of various kinds ad elaborated equipment is required for FM broadcast. A radio frequency carrier wave can be modulated using a-

Both amplitude modulation (AM) and frequency modulation (FM) are used for radio broadcasting. The amplitude of the high frequency carrier wave is varied or modulated in accordance with the variations in the amplitude of the audio signals that are to be transmitted, in te process of amplitude modulation in frequency modulation te amplitude of the carrier remains constant but its frequency is varied inn accordance withh the audio signal. Reception with AM signals is in general is affected by interference of various kinds ad elaborated equipment is required for FM broadcast. In india the radio signals are boarcast using-

Both amplitude modulation (AM) and frequency modulation (FM) are used for radio broadcasting. The amplitude of the high frequency carrier wave is varied or modulated in accordance with the variations in the amplitude of the audio signals that are to be transmitted, in te process of amplitude modulation in frequency modulation te amplitude of the carrier remains constant but its frequency is varied inn accordance withh the audio signal. Reception with AM signals is in general is affected by interference of various kinds ad elaborated equipment is required for FM broadcast. The rangeof a transmitter is

Why is the amplitude of modulating signal kept less than the amplitude of carrier wave ?

TARGET PUBLICATION-COMMUNICATION SYSTEMS-Competitive Thinking
  1. A carrier wave of peak voltage 12 V is used to transmit a message sign...

    Text Solution

    |

  2. A single of 5 kHz frequency is amplitude modulated on a carrier wave o...

    Text Solution

    |

  3. The amplitude of carrier wave is 12 . For modulation index of 50% th...

    Text Solution

    |

  4. The audio signal used to modulate 60 sin (2pixx10^(6)t) is 15 sin 300 ...

    Text Solution

    |

  5. A message signal of 12 kHz and peak voltage 20 V is used to modulate a...

    Text Solution

    |

  6. An oscillator is producing FM waves of requency 2kHz with a variation ...

    Text Solution

    |

  7. When carrier wave of 2 . 5 MHz frequency is amplitude modulated, the ...

    Text Solution

    |

  8. The equation of an FM signal is e = 6 sin (10^(6) t + 4 sin 10^(3) t )...

    Text Solution

    |

  9. The distance of coverage of a transmitting antenna is 12 . 8 km . Then...

    Text Solution

    |

  10. If a transmitting antenna of height 105 m is placed on a hill, then it...

    Text Solution

    |

  11. A ratio has a power of 1 kW and is operating at a frequency of 10 GHz ...

    Text Solution

    |

  12. Height of T .V . Tower is h(T) . The area of transmission of T . V . W...

    Text Solution

    |

  13. In an amplitude modulated wave for audio frequency of 500 "cycle"//sec...

    Text Solution

    |

  14. A modem is a

    Text Solution

    |

  15. The electromagnetic wave of frequency 3 MHz to 30 MHz are

    Text Solution

    |

  16. In which frequency range, space waves are normally propagated?

    Text Solution

    |

  17. Name the type of waves which are used for line of sight (LOS) communic...

    Text Solution

    |

  18. The ionosphere is used for the propagation of

    Text Solution

    |

  19. The maximum frequency of transmitted radio waves above which the radio...

    Text Solution

    |

  20. For sky wave propagation of a 10 MHz signal, what should be the minimu...

    Text Solution

    |