Home
Class 12
PHYSICS
The process of superimposing a low frequ...

The process of superimposing a low frequency signal on a high frequency wave is `"_________"`.

A

detection

B

mixing

C

modulution

D

attenuation

Text Solution

Verified by Experts

The correct Answer is:
c
Modulation
The process of superimposing a low frequency signal an a high frequency wave is known as modulution .
Promotional Banner

Topper's Solved these Questions

  • FEBRUARY 2016

    GURUKUL PUBLICATION - MAHARASHTRA PREVIOUS YEAR PAPERS|Exercise SECTION-II|21 Videos

  • FEBRUARY 2014

    GURUKUL PUBLICATION - MAHARASHTRA PREVIOUS YEAR PAPERS|Exercise SECTION-II|21 Videos

  • FEBRUARY 2018

    GURUKUL PUBLICATION - MAHARASHTRA PREVIOUS YEAR PAPERS|Exercise SECTION-II|21 Videos

Similar Questions

Explore conceptually related problems

High frequency waves are

Frequency of a wave .

The process of superimposing signal frequency (i.e. audio wave) on the carrier wave is known as

The range of frequency of audio signal 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

In the process of modulation, the radio frequency wave is known as

One of the components of frequency of amplitude modulated wave (AM) formed by the superposition of message signal of frequency omega_1 on a carrier wave of frequency omega_2 is

At low frequency a condenser offers

Modulation is the phenomenon of superimposing the low audio frequency base band message or information signals ( called the modulation signals) on a high frequency wave (called, the carrier wave). The resultant wave is called the modulated wave, which is transmitted. Read the above passage and answer the following questions: (i) What are the Audio Frequency and Radio Frequency ranges? (ii) Why audio frequency signals, as such cannot be transmitted over long distance? (iii) What does the phenomemom imply in day to day life ?

GURUKUL PUBLICATION - MAHARASHTRA PREVIOUS YEAR PAPERS- FEBRUARY 2016-SECTION-II
  1. Draw a neat labelled diagram for the construction of 'cyclotron '.

    Text Solution

    |

  2. Give any 'two' points of differences between diamagnetic and ferromagn...

    Text Solution

    |

  3. PROPAGATION OF ELECTROMAGNETIC WAVES

    Text Solution

    |

  4. The combined resistance of a galvanometer of resistance 500 Omega ...

    Text Solution

    |

  5. The susceptibility of magnesium at 200K is 1.8 xx 10^(-5). At what t...

    Text Solution

    |

  6. The co-efficient of mutual induction between primary and secondary ...

    Text Solution

    |

  7. The decay constant of radioactive substance is 4.33 xx 10^(-4) per ...

    Text Solution

    |

  8. If the polarising angle for a given medium is 60^@, then the refract...

    Text Solution

    |

  9. The resolving power of a telescope depends on

    Text Solution

    |

  10. Electric field intensity due to a charged sphere at a point outside ...

    Text Solution

    |

  11. In potentiometer experiment, if l(1) is the balancing length for e.m.f...

    Text Solution

    |

  12. The energy of a photon of wavelength lambda is given by

    Text Solution

    |

  13. Which of the following gates correspond to the truth table given belo...

    Text Solution

    |

  14. The process of superimposing a low frequency signal on a high freque...

    Text Solution

    |

  15. State the principle on which transformer works. Explain its working wi...

    Text Solution

    |

  16. With the help of a neat labelled diagram, describe the Geiger-Marsde...

    Text Solution

    |

  17. Determine the change in wavelength of light during its passage fro...

    Text Solution

    |

  18. In biprism experiment, 10th dark band is observed at 2.09 mm from the...

    Text Solution

    |

  19. Describe Kelvin's method to determined the resistance of galvanome...

    Text Solution

    |

  20. Explain the elementary idea of an oscillator with the help of block ...

    Text Solution

    |