Home
Class 12
PHYSICS
(A): It is necessary to use satellites f...

(A): It is necessary to use satellites for long distance T.V transmission
(R): The television signals are low frequency signals.

A

Assertion and reason are true and reason is the correct explanation of assertion

B

Assertion and reason are true but reason is not correct explanation of assertion

C

Assertion is true but reason is false

D

Assertion is false but Reason is true.

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • COMMUNICATION SYSTEMS

    AAKASH SERIES|Exercise EXERCISE-II (TV Antenna)|14 Videos

  • COMMUNICATION SYSTEMS

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

  • COMMUNICATION SYSTEMS

    AAKASH SERIES|Exercise EXERCISE-I (Line Communication )|12 Videos

  • COMMUNICATION SYSTEM

    AAKASH SERIES|Exercise LECTURE SHEET (LEVEL - I) (MAIN) (EXERCISE - IV) (Straight Objective & More than one Correct Answer Type Questions)|20 Videos

  • CURRENT ELECTRICITY

    AAKASH SERIES|Exercise PROBLEMS (LEVEL-II)|27 Videos

Similar Questions

Explore conceptually related problems

It is necessary ton use satellites for long distance TV transmission. Explain why?

A : It is necessary to use satellites for long distance TV transmission. R : Television signals are not properly reflected by the ionosphere therefore, reflection is effected by satellites.

(A) : The sky waves are not used in the transmission of television signals. (R) : Sky waves are mechanical waves.

(a) Give three reasons why modulation of a message signal is necessary for long distance transmission. (b) Show graphically an audio singal, a carrier wave and an amplitude modulation wave.

(A): Low frequency audio signals can not be transmitted directly over long distances (B) : To transmit low frequency audio signals over long distances, the audio signals are super imposed on a high frequency carrier signal

Why is ground wave transmission of signals restricted to a frequency of 1500 kHz ?

Would sky waves be suitable for transmission of TV signals of 60 MHz frequency?

Which of the following is better propagation mode to propagate television frequency and radar signals ?

(A): A FM signal is less susceptible to noise than an AM signal. (B) : In FM transmission, the message signal is in the form of frequency variations of carrier waves. During modulation process, the noise gets amplitude modulated.

Statement-1: Sky wave signals are used for long distance radio communication. These signals are in general less stable than ground wave signals Statement-2 : The state of ionosphere varies from hour to hour, day to day and season to season