HARD
12th CBSE
IMPORTANT
Earn 100

Prove that the average energy density of the oscillating electric field is equal to that of the oscillating magnetic field.

Important Questions on Electromagnetic Waves

EASY
12th CBSE
IMPORTANT
EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 8 - Electromagnetic Waves>cbse-2018>Q 2
Name the electromagnetic radiations used for (a) water purification, and (b) eye surgery.
EASY
12th CBSE
IMPORTANT
EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 8 - Electromagnetic Waves>cbse-2018>Q 3
Name the electromagnetic radiations used for eye surgery.
MEDIUM
12th CBSE
IMPORTANT
EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 8 - Electromagnetic Waves>cbse-2018>Q 4
Which mode of propagation is used by short wave broadcast services ?
EASY
12th CBSE
IMPORTANT
EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 8 - Electromagnetic Waves>cbse-2018>Q 5
Why are infra-red waves often called heat waves ? Explain.
MEDIUM
12th CBSE
IMPORTANT
EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 8 - Electromagnetic Waves>cbse-2018>Q 6
 What do you understand by the statement, “Electromagnetic waves transport momentum”?
EASY
12th CBSE
IMPORTANT
EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 8 - Electromagnetic Waves>cbse-2019>Q 7
Identify the part of the electromagnetic spectrum used in i radar and ii eye surgery. Write their frequency range.
EASY
12th CBSE
IMPORTANT
EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 8 - Electromagnetic Waves>cbse-2020>Q 8
Write an expression for the speed of light in a material medium of relative permittivity εr and relative magnetic permeability μr