EASY
12th West Bengal Board
IMPORTANT
Earn 100

Define the term ‘critical frequency’ in relation to sky wave propagation of electromagnetic waves.

Important Questions on Communication System

EASY
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 23 - Communication System>EXERCISE 23>Q 9
What is Amplitude modulation?
EASY
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 23 - Communication System>EXERCISE 23>Q 10
What should be the length of dipole antenna for a carrier wave of frequency of 6×108 Hz?
MEDIUM
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 23 - Communication System>EXERCISE 23>Q 11
What is the purpose of modulating a signal in transmission?
EASY
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 23 - Communication System>EXERCISE 23>Q 12
What is sky wave propagation?
MEDIUM
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 23 - Communication System>EXERCISE 23>Q 13
Define the term modulation? Draw a block diagram of a simple amplitude modulator for obtaining an AM Signal.
MEDIUM
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 23 - Communication System>EXERCISE 23>Q 14
Why are high frequency carrier waves used for transmission?
MEDIUM
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 23 - Communication System>EXERCISE 23>Q 15
What is space wave propagation?
EASY
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 23 - Communication System>EXERCISE 23>Q 16
What is ground wave propagation?