HARD
12th West Bengal Board
IMPORTANT
Earn 100

A signal of peak value 5 V at 10 k Hz is modulated using a carrier wave of peak voltage 10 V and 2 MHz. The side-band frequencies are 

50% studentsanswered this correctly

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 2
Give the frequency ranges of the high frequency band, 
EASY
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 23 - Communication System>EXERCISE 23>Q 2
Give the frequency ranges of very high frequency band (VHF), 
EASY
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 23 - Communication System>EXERCISE 23>Q 2
Give the frequency ranges of the following : (iii) Ultra high frequency band 
EASY
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 23 - Communication System>EXERCISE 23>Q 2
Give the frequency ranges of the Super high frequency band.
MEDIUM
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 23 - Communication System>EXERCISE 23>Q 3
Why long distance radio broadcasts use short-wave bands? 
EASY
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 23 - Communication System>EXERCISE 23>Q 5
Name the device which can represent digital data by analog signals and vice-versa.
EASY
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 23 - Communication System>EXERCISE 23>Q 6
What is a transponder?
MEDIUM
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 23 - Communication System>EXERCISE 23>Q 26
The maximum permissible value of the modulation index for an AM carrier wave is