EASY
11th Maharashtra Board
IMPORTANT
Earn 100

What are ultraviolet rays? Give two uses.

Important Questions on Electromagnetic Waves and Communication System

EASY
11th Maharashtra Board
IMPORTANT
Physics>Chapter 13 - Electromagnetic Waves and Communication System>Exercises>Q 2
What are radio waves? Give its two uses.
EASY
11th Maharashtra Board
IMPORTANT
Physics>Chapter 13 - Electromagnetic Waves and Communication System>Exercises>Q 2
Name the most harmful radiation entering the Earth's atmosphere from the outer space.
EASY
11th Maharashtra Board
IMPORTANT
Physics>Chapter 13 - Electromagnetic Waves and Communication System>Exercises>Q 2

Give reasons for the following - 

(i) Long distance radio broadcast use short wave bands.

EASY
11th Maharashtra Board
IMPORTANT
Physics>Chapter 13 - Electromagnetic Waves and Communication System>Exercises>Q 2

Give reasons for the following -

(ii) Satellites are used for long distance TV transmission

EASY
11th Maharashtra Board
IMPORTANT
Physics>Chapter 13 - Electromagnetic Waves and Communication System>Exercises>Q 2
Name the three basic units of any communication system.
EASY
11th Maharashtra Board
IMPORTANT
Physics>Chapter 13 - Electromagnetic Waves and Communication System>Exercises>Q 2
What is a carrier wave?
EASY
11th Maharashtra Board
IMPORTANT
Physics>Chapter 13 - Electromagnetic Waves and Communication System>Exercises>Q 2
Why high frequency carrier waves are used for transmission of audio signals?
EASY
11th Maharashtra Board
IMPORTANT
Physics>Chapter 13 - Electromagnetic Waves and Communication System>Exercises>Q 2
What is modulation?