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12th West Bengal Board
IMPORTANT
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The ground receiver in line-of-sight communication cannot receive direct waves due to 

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Important Questions on Communication System

MEDIUM
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 23 - Communication System>EXERCISE 23>Q 24
In the ionosphere, wave are bent down by 
HARD
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 23 - Communication System>EXERCISE 23>Q 25
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 
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