EASY
11th Maharashtra Board
IMPORTANT
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What are EM waves ?

Important Questions on Electromagnetic Waves and Communication System

MEDIUM
11th Maharashtra Board
IMPORTANT
Physics>Chapter 13 - Electromagnetic Waves and Communication System>Exercises>Q 2
How are EM waves produced?
EASY
11th Maharashtra Board
IMPORTANT
Physics>Chapter 13 - Electromagnetic Waves and Communication System>Exercises>Q 2

Can we produce a pure electric or magnetic wave in space? Why?

EASY
11th Maharashtra Board
IMPORTANT
Physics>Chapter 13 - Electromagnetic Waves and Communication System>Exercises>Q 2
Does an ordinary electric lamp emit EM waves?
EASY
11th Maharashtra Board
IMPORTANT
Physics>Chapter 13 - Electromagnetic Waves and Communication System>Exercises>Q 2
Why light waves travel in vacuum whereas sound wave cannot?
EASY
11th Maharashtra Board
IMPORTANT
Physics>Chapter 13 - Electromagnetic Waves and Communication System>Exercises>Q 2
What are ultraviolet rays? Give two uses.
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.