Home
Class 12
PHYSICS
Which of following four alternatives is ...

Which of following four alternatives is not correct? We need modulation:

A

to increase the selectivity

B

to reduce the time lag between transmission and reception of the information signal

C

to reduce the size of antenna

D

to reduce the fractional bandwidth, that is the ratio of the signal bandwidth to the centre frequency

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • COMMUNICATION SYSTEM

    AAKASH SERIES|Exercise LECTURE SHEET (LEVEL - I) (MAIN) (EXERCISE - II) (Straight Objective & More than one Correct Answer Type Questions)|19 Videos

  • COMMUNICATION SYSTEM

    AAKASH SERIES|Exercise LECTURE SHEET (LEVEL - I) (MAIN) (EXERCISE - III) (Straight Objective & More than one Correct Answer Type Questions)|26 Videos

  • CAPACITORS

    AAKASH SERIES|Exercise PRACTICE SHEET (ADVANCED) (Integer Type Questions)|2 Videos

  • COMMUNICATION SYSTEMS

    AAKASH SERIES|Exercise PRACTICE EXERCISE (TV Antenna)|16 Videos

Similar Questions

Explore conceptually related problems

which of the following four statements are correct?

In which of the following salt bridge is not needed ?

In amplitude modulation, sinusoidal carrier frequency used is denoted by omega_(c) and the signal frequency is denoted by omega_(m) . The bandwidth (Deltaomega_(m)) of the signal is such that Deltaomega_(m)ltltomega_(c) . Which of the following frequency is not contained in the modulated wave.

Which of the following arrangements shows the correct order of electron affinity of the four halogen atoms I,Cl,Br,F?

Which of the following represents the correct sets of the four quantum numbers of a 4d electron

Which of the following needs a proof ?

Which of the following represent(s) the correct set of four quantum numbers of a 5d electron ?

Which of the following is/are the limitations of amplitude modulation?

Which of the following modulation index produces noise?

Which one of the following statements is correct about all the four of jellyfish , starfish ,platypus and pigeon ?

AAKASH SERIES-COMMUNICATION SYSTEM -LECTURE SHEET (LEVEL - I) (MAIN) (EXERCISE - IV) (Straight Objective & More than one Correct Answer Type Questions)
  1. Which of following four alternatives is not correct? We need modulatio...

    Text Solution

    |

  2. The highest frequency of radiowaves which when sent at some angle towa...

    Text Solution

    |

  3. Speed of electromagnetic waves is the same

    Text Solution

    |

  4. In space communication, the information can be passed from one place t...

    Text Solution

    |

  5. Which one of the following is correct ?

    Text Solution

    |

  6. The space wave propagation is utilized in

    Text Solution

    |

  7. Three waves A,B and C of frequencies 1600 KHz, 5MHz and 60 MHz, respec...

    Text Solution

    |

  8. A transmitter transmits the message in original

    Text Solution

    |

  9. A receiver reconstructs the original message after propagation through...

    Text Solution

    |

  10. A 100m long antenna is mounted on a 500m tall building. The complex ca...

    Text Solution

    |

  11. A diode detector is used to detect an amplitude modulated wave of 60% ...

    Text Solution

    |

  12. The number of telephone conversations by a fibre of band width 40MHz, ...

    Text Solution

    |

  13. Which of the following devices is full duplex?

    Text Solution

    |

  14. Which of the following devices is half duplex ?

    Text Solution

    |

  15. Which of the following statement is wrong?

    Text Solution

    |

  16. Through which mode of propagation the radio waves can be sent from one...

    Text Solution

    |

  17. The maximum peak to peak voltage of an AM wire is 24 mV and the minimu...

    Text Solution

    |

  18. In a communication system, noise is most likely to affect the signal

    Text Solution

    |

  19. The radio waves of frequency 300 MHz to 3000 MHz belong to

    Text Solution

    |

  20. Match the column I with column II.

    Text Solution

    |

  21. Match the following elements of column I with their property given in ...

    Text Solution

    |