EASY
12th ICSE
IMPORTANT
Earn 100

What is modulation? Explain the need of modulating a low frequency information signal.

Important Questions on Communication Systems

MEDIUM
12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 22 - Communication Systems>QUESTIONS>Q 2
What is amplitude modulation? Write the importance of modulation factor.
MEDIUM
12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 22 - Communication Systems>QUESTIONS>Q 3
Draw a block diagram of simple amplitude modulation. Explain briefly how amplitude modulation is achieved?
MEDIUM
12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 22 - Communication Systems>QUESTIONS>Q 4
What is amplitude modulation? Distinguish one difference between frequency modulation and amplitude modulation. 
MEDIUM
12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 22 - Communication Systems>QUESTIONS>Q 5
Explain, with the help of a block diagram, how the process of modulation is carried out in radio broadcasts?
MEDIUM
12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 22 - Communication Systems>QUESTIONS>Q 6
Distinguish between frequency modulation and amplitude modulation. Why is FM signal less susceptive to noise than an AM signal?
EASY
12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 22 - Communication Systems>QUESTIONS>Q 7
What are the advantages of AM over FM transmission?
HARD
12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 22 - Communication Systems>QUESTIONS>Q 8
Explain sky-wave propagation of radio waves. Give diagram. Why is the transmission of signals using sky waves restricted to frequencies upto about 10 MHz?
MEDIUM
12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 22 - Communication Systems>QUESTIONS>Q 9
Mention the frequency at which TV signals are transmitted. What is common between these waves and light waves?