EASY
JEE Main/Advance
IMPORTANT
Earn 100

Long range radio transmission is possible when the radio waves are reflected from the ionosphere. For this to happen, the frequency of the radio waves must be in the range,

50% studentsanswered this correctly

Important Questions on Communication Systems

EASY
JEE Main/Advance
IMPORTANT
Alpha Question Bank for Engineering: Physics>Chapter 36 - Communication Systems>Exercise - 2>Q 8
A signal of 5 kHZ frequency is amplitude modulated on a carrier wave of frequency 2 MHz. The frequencies of the resultant signal is/are:
EASY
JEE Main/Advance
IMPORTANT
Alpha Question Bank for Engineering: Physics>Chapter 36 - Communication Systems>Exercise - 2>Q 9
Choose the correct statement.
EASY
JEE Main/Advance
IMPORTANT
Alpha Question Bank for Engineering: Physics>Chapter 36 - Communication Systems>Exercise - 2>Q 10
In amplitude modulation, sinusoidal carrier frequency used is denoted by ωc and the signal frequency is denoted by ωm. The bandwidth ∆ωm of the signal is such that ∆ωm≪ ωc. Which of the following frequency is not contained in the modulated wave?
EASY
JEE Main/Advance
IMPORTANT
Alpha Question Bank for Engineering: Physics>Chapter 36 - Communication Systems>Exercise - 2>Q 11
A telephonic communication service is working at carrier frequency of 10 GHz. Only 10% of it is utilized for transmission. How many telephonic channels can be transmitted simultaneously if each channel requires a bandwidth of 5 kHz?