Electromagnetic Waves Test 01

# Electromagnetic Waves Test 01 Notes - Class 12

## Document Description: Electromagnetic Waves Test 01 for Class 12 2022 is part of Class 12 preparation. The notes and questions for Electromagnetic Waves Test 01 have been prepared according to the Class 12 exam syllabus. Information about Electromagnetic Waves Test 01 covers topics like and Electromagnetic Waves Test 01 Example, for Class 12 2022 Exam. Find important definitions, questions, notes, meanings, examples, exercises and tests below for Electromagnetic Waves Test 01.

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CBSE TEST PAPER-01
CLASS - XII PHYSICS (Electro magnetic waves)
1.
What is the role of ozone in the atmosphere?

2.
What is the nature of waves used in radar?

3.
Write the application of Infra-red radiations?

4.
Which constituent radiation of the electromagnetic spectrum is used?
(1) To photograph internal parts of human body.

5.
Electric field in a plane electromagnetic wave is given by
E Z = 60 sin
( )
3
11
10 3
10 / .
2 2
x t
V m
? ?
+
? ?
? ?

(a) Write an expression for the magnetic field
(b) What is the magnitude of wavelength and frequency of the wave?

6.
In a plane electromagnetic wave, the electric field oscillates sinusoid ally with a
frequency of 2 × 10
10
Hz and amplitude 48V/m.
(a) What is the wavelength of the em. wave?
(b) Calculate the amplitude of the oscillating magnetic field.
(c) Calculate average energy density of the electromagnetic field of the wave?

7.
Find the wavelength of electromagnetic waves of frequency 6 × 10
12
Hg in free
space. Give two applications?

8.
A plane monochromatic wave lies in the visible region. It is represented by the
sinusoidal variation with time by the following components of electric field
Ex = 0, Ey = 4 sin ( )
2
, x vt
p
?
? ?
- ? ?
? ?
Ez = 0
Where ? = 5 × 10
14
Hg  And ? is the wavelength of light.
(a) What is the direction of propagation of the wave?
(b) What is its amplitude?
(c) Compute the component of magnetic field?

9.
Write the characteristics of em waves? Write the expression for velocity of
electromagnetic waves in terms of permittivity and permeability of the
medium?

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