If Electric field intensity of a uniform plane electro magnetic wave is given as E = - 301 . 6 sin k z - ω t a ^ x + 452 . 4 sin k z - ω t a ^ y V m - 1 . Then, magnetic intensity H of this wave in A m - 1 will be [Given : Speed of light in vacuum c = 3 × 10 8 m s - 1 , Permeability of vacuum μ 0 = 4 π × 10 - 7 N A - 2 ]

- 0 . 8 sin k z - ω t a ^ y - 1 . 2 sin k z - ω t a ^ x

+ 0 . 8 sin k z - ω t a ^ y + 0 . 8 sin k z - ω t a ^ x

+ 1 . 0 × 10 - 6 sin k z - ω t a ^ y + 1 . 5 × 10 - 6 k z - ω t a ^ x

- 1 . 0 × 10 - 6 sin k z - ω t a ^ y - 1 . 5 × 10 - 6 sin k z - ω t a ^ x

Match List - I with List - II List-I List-II (a) Ultravoilet rays (i) Study crystal structure (b) Microwaves (ii) Greenhouse effect (c) Infrared waves (iii) Sterilizing surgical instrument (d) X -rays (iv) Radar system

a - iii , b iv , c - ii , d - i

a - iii , b i , c - ii , d - iv

a - iv , b iii , c - ii , d - i

a - iii , b iv , c - i , d - ii

Given below are two statements : Statement I : Electromagnetic waves are not deflected by electric and magnetic field. Statement II : The amplitude of electric field and the magnetic field in electromagnetic waves are related to each other as E 0 = μ 0 ε 0 B 0 . In the light of the above statements, choose the correct answer from the options given below:

Statement I is true but statement II is false

Both Statement I and Statement II are true

Statement I is false but statement II is true

Both Statement I and Statement II are false

MEDIUM

JEE Main

IMPORTANT

Earn 100

The electromagnetic waves travel in a medium at a speed of $2.0 \times 10^{8} m s^{- 1}$ . The relative permeability of the medium is $1.0$ . The relative permittivity of the medium will be

66.67% studentsanswered this correctly

Important Questions on Electromagnetic Waves

EASY

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 17 - Electromagnetic Waves>JEE Main - 26 June 2022 Shift 2>Q 62

Which is the correct ascending order of wavelengths?

HARD

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 17 - Electromagnetic Waves>JEE Main - 26 June 2022 Shift 1>Q 63

If Electric field intensity of a uniform plane electro magnetic wave is given as

E = - 301.6 \sin (k z - ω t) {\hat{a}}_{x} + 452.4 \sin (k z - ω t) {\hat{a}}_{y} V m^{- 1} .

Then, magnetic intensity

H

of this wave in

A m^{- 1}

will be [Given : Speed of light in vacuum

c = 3 \times 10^{8} {m s}^{- 1}

, Permeability of vacuum

μ_{0} = 4 π \times 10^{- 7} N A^{- 2}

]

EASY

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 17 - Electromagnetic Waves>JEE Main - 27 June 2022 Shift 1>Q 64

Match List - I with List - II

	List-I		List-II
(a)	Ultravoilet rays	(i)	Study crystal structure
(b)	Microwaves	(ii)	Greenhouse effect
(c)	Infrared waves	(iii)	Sterilizing surgical instrument
(d)	$X$ -rays	(iv)	Radar system

EASY

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 17 - Electromagnetic Waves>JEE Main - 27 June 2022 Shift 2>Q 65

Given below are two statements :

Statement I: A time varying electric field is a source of changing magnetic field and vice-versa. Thus a disturbance in electric or magnetic field creates EM waves.

Statement II: In a material medium, the EM wave travels with speed $v = \frac{1}{\sqrt{μ_{0} ϵ_{0}}}$ .

In the light of the above statements, choose the correct answer from the options given below.

HARD

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 17 - Electromagnetic Waves>JEE Main - 28 June 2022 Shift 1>Q 66

A radar sends an electromagnetic signal of electric field

(E_{0}) = 2.25 V m^{- 1}

and magnetic field

(B_{0}) = 1.5 \times 10^{- 8} T

which strikes a target on line of sight at a distance of

3 km

in a medium. After that, a part of signal (echo) reflects back towards the radar with same velocity and by same path. If the signal was transmitted at time

t = 0

from radar, then after how much time echo will reach to the radar?

EASY

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 17 - Electromagnetic Waves>JEE Main - 28 June 2022 Shift 2>Q 67

An EM wave propagating in

x

-direction has a wavelength of

8 mm

. The electric field vibrating

y

-direction has maximum magnitude of

60 {Vm}^{- 1}

. Choose the correct equations for electric and magnetic fields if the EM wave is propagating in vacuum :

HARD

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 17 - Electromagnetic Waves>JEE Main - 29 June 2022 Shift 1>Q 68

The intensity of the light from a bulb incident on a surface is $0.22 W m^{- 2}$ . The amplitude of the magnetic field in this light-wave is _____ $\times 10^{- 9} T$

(Given : Permittivity of vacuum $ϵ_{0} = 8.85 \times 10^{- 12} C^{2} N^{- 1} m^{- 2}$ , speed of light in vacuum $c = 3 \times 10^{8} {m s}^{- 1}$ )

HARD

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 17 - Electromagnetic Waves>JEE Main - 29 June 2022 Shift 2>Q 69

The displacement current of

4.425 μA

is developed in the space between the plates of parallel plate capacitor when voltage is changing at a rate of

10^{6} V s^{- 1}

. The area of each plate of the capacitor is

40 {cm}^{2}

. The distance between each plate of the capacitor is

x \times 10^{- 3} m

. The value of

x

is ,
(Permittivity of free space,

ε_{0} = 8.85 \times 10^{- 12} C^{2} N^{- 1} m^{- 2}

) _______

The electromagnetic waves travel in a medium at a speed of 2.0×108 m s-1. The relative permeability of the medium is 1.0. The relative permittivity of the medium will be

Important Questions on Electromagnetic Waves

Learn and Prepare for any exam you want !

The electromagnetic waves travel in a medium at a speed of $2.0 \times 10^{8} m s^{- 1}$ . The relative permeability of the medium is $1.0$ . The relative permittivity of the medium will be