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Electromagnetic Waves — JEE Main & Advanced Physics PYQs

281 previous year questions from Electromagnetic Waves with answers and solutions. Numbered list, year tags, and one-tap solutions — built for serious JEE / NEET practice.

281 questionsPhysicsSolutions on every page
1

The electric field associated with an electromagnetic wave travelling in vacuum is given by E₀ (3y + 4z + t) , i , where is the angular frequency. All quantities are in SI units. T

JEE Advanced 2026 Solution View → 2

A monochromatic source of light operating at 15 kW emits 2.5 10²² photons/s. The region of an electromagnetic spectrum to which the emitted electromagnetic radiation belongs to ___

JEE Main 2026 Solution View → 3

For an electromagnetic wave propagating through vacuum, k , E and represent propagation vector, electric field and angular frequency, respectively. The magnetic field associated wi

JEE Main 2026 Solution View → 4

A point light source emits E.M. waves in free space. A detector, placed at a distance of L m, measures the intensity as I_o . The detector is now shifted to another location on the

JEE Main 2026 Solution View → 5

A displacement current of 4.0 A can be set up in the space between two parallel plates of 6 F capacitor. The rate of change of potential difference across the plates of the capacit

JEE Main 2026 Solution View → 6

A magnetic field vector in an electromagnetic wave is represented by B =B₀ (2 vt- 2 x ) j . Its associated electric field vector is ______.

JEE Main 2026 Solution View → 7

An electromagnetic wave travels in free space along the x -direction. At a particular point in space and time, B = 2 10⁻⁷ j T is associated with this wave. The value of correspondi

JEE Main 2026 Solution View → 8

An electromagnetic wave travelling in x -direction is described by field equation E_y = 300 (t - x c ) . If the electron is restricted to move in y -direction only with speed of 1.

JEE Main 2026 Solution View → 9

A plane electromagnetic wave is moving in free space with velocity c=3 10⁸ ~m / s and its electric field is given as E =54 (k z- t) j ~V / m , where j is the unit vector along y -a

JEE Main 2026 Solution View → 10

The electric field of an electromagnetic wave travelling through a medium is given by E (x, t)=25 (2.0 10¹⁵ t-10⁷ x ) n then the refractive index of the medium is _ _ _ _ . (All gi

JEE Main 2026 Solution View → 11

Match the List-I with List-II ( array |l|l|l|l| & List-I & & List-II A. & Radio-wave & I. & is produced by Magnetron valve B. & Micro-wave & II. & due to change in the vibrational

JEE Main 2026 Solution View → 12

The ratio of speeds of electromagnetic waves in vacuum and a medium, having dielectric constant k=3 and permeability of =2 ₀ , is ( ₀= permeability of vacuum)

JEE Main 2026 Solution View → 13

Match List - I with List - II. array l List - I & List - II Relation & Law A. E d l =- d d t B d a & I. Ampere's circuital law B. B d l = ₀ (I+ ₀ d _ E d t ) & II. Faraday's laws o

JEE Main 2026 Solution View → 14

The equation of the electric field of an electromagnetic wave propagating through free space is given by : E= 377 (6.27 10³ t-2.09 10⁻⁵ x ) N / C The average power of the electroma

JEE Main 2026 Solution View → 15

A laser beam has intensity of 4.0 10¹⁴ ~W / m ² . The amplitude of magnetic field associated with beam is _ _ _ _ T. (Take _ o =8.85 10⁻¹² C ² / Nm ² and c =3 10⁸ ~m / s )

JEE Main 2026 Solution View → 16

The electric field of a plane electromagnetic wave, travelling in an unknown nonmagnetic medium is given by, E_ y =20 (3 10⁶ x-4.5 10¹⁴ t ) V / m (where x, t and other values have

JEE Main 2026 Solution View → 17

An electromagnetic wave of frequency 100 MHz propagates through a medium of conductivity, =10 mho / m . The ratio of maximum conduction current density to maximum displacement curr

JEE Main 2026 Solution View → 18

The electric field in a plane electromagnetic wave is given by : E_ y =69 [0.6 10³ x-1.8 10¹¹ t ] V / m . The expression for magnetic field associated with this electromagnetic wav

JEE Main 2026 Solution View → 19

A cube of unit volume contains 35 10^7 photons of frequency 10¹⁵ ~Hz . If the energy of all the photons is viewed as the average energy being contained in the electromagnetic waves

JEE Advanced 2025 Solution View → 20

The unit of 2 I ₀ c is : (I = intensity of an electromagnetic wave, c : speed of light)

JEE Main 2025 Solution View → 21

Two plane polarized light waves combine at a certain point whose electric field components are aligned & E ₁= E ₀ t & E ₂= E ₀ ( t + 3 ) aligned Find the amplitude of the resultant

JEE Main 2025 Solution View → 22

If an optical medium possesses a relative permeability of 10 and relative permittivity of 1 0.0885 , then the velocity of light is greater in vacuum than that in this medium by ___

JEE Main 2025 Solution View → 23

A plane electromagnetic wave propagates along the +x direction in free space. The components of the electric field, E and magnetic field, B vectors associated with the wave in Cart

JEE Main 2025 Solution View → 24

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : Electromagnetic waves carry energy but not momentum. Reas

JEE Main 2025 Solution View → 25

The magnetic field of an E.M. wave is given by B = ( 3 2 i + 1 2 j ) 30 [ ( t - z c ) ] (S.I. Units). The corresponding electric field in S.I. units is :

JEE Main 2025 Solution View → 26

Due to presence of an em-wave whose electric component is given by E =100 ( t - kx ) NC ⁻¹ , a cylinder of length 200 cm holds certain amount of em-energy inside it. If another cyl

JEE Main 2025 Solution View → 27

A plane electromagnetic wave of frequency 20 MHz travels in free space along the +x direction. At a particular point in space and time, the electric field vector of the wave is E _

JEE Main 2025 Solution View → 28

The electric field of an electromagnetic wave in free space is E =57 [7.5 10^6 t -5 10⁻³(3 x+4 y) ](4 i -3 j ) N / C . The associated magnetic field in Tesla is

JEE Main 2025 Solution View → 29

A parallel plate capacitor of area A=16 ~cm ^2 and separation between the plates 10 cm , is charged by a DC current. Consider a hypothetical plane surface of area A ₀=3.2 ~cm ^2 in

JEE Main 2025 Solution View → 30

A metal target with atomic number Z=46 is bombarded with a high energy electron beam. The emission of X-rays from the target is analyzed. The ratio r of the wavelengths of the K_ -

JEE Advanced 2024 Solution View → 31

The magnetic field in a plane electromagnetic wave is B _ y = (3.5 10⁻⁷ ) (1.5 10^3 x+0.5 10¹¹ t ) T . The corresponding electric field will be :

JEE Main 2024 Solution View → 32

A plane EM wave is propagating along x direction. It has a wavelength of 4 ~mm . If electric field is in y direction with the maximum magnitude of 60 Vm ⁻¹ , the equation for magne

JEE Main 2024 Solution View → 33

In the given electromagnetic wave E _ y =600 ( t - kx ) Vm ⁻¹ , intensity of the associated light beam is (in W / m ^2 : (Given ₀=9 10⁻¹² C ^2 ~N ⁻¹ ~m ⁻² )

JEE Main 2024 Solution View → 34

Electromagnetic waves travel in a medium with speed of 1.5 10^8 ~m ~s ⁻¹ . The relative permeability of the medium is 2.0 . The relative permittivity will be:

JEE Main 2024 Solution View → 35

Match List-I with List-II : array |c|c|c|c| & List-I & & List-II & EM-Wave & & Wavelength Range (A) & Infra-red & (I) & < 10⁻³ ~nm (B) & Ultraviolet & (II) & 400 ~nm to 1 ~nm (C) &

JEE Main 2024 Solution View → 36

An alternating voltage of amplitude 40 ~V and frequency 4 kHz is applied directly across the capacitor of 12 F . The maximum displacement current between the plates of the capacito

JEE Main 2024 Solution View → 37

Arrange the following in the ascending order of wavelength: A. Gamma rays ( ₁ ) B. x - rays ( ₂ ) C. Infrared waves ( ₃ ) D. Microwaves ( ₄ ) Choose the most appropriate answer fro

JEE Main 2024 Solution View → 38

The electric field in an electromagnetic wave is given by E = i 40 ( t -z / c ) NC ⁻¹ . The magnetic field induction of this wave is (in SI unit) :

JEE Main 2024 Solution View → 39

If frequency of electromagnetic wave is 60 MHz and it travels in air along z direction then the corresponding electric and magnetic field vectors will be mutually perpendicular to

JEE Main 2024 Solution View → 40

Given below are two statements: Statement I: Electromagnetic waves carry energy as they travel through space and this energy is equally shared by the electric and magnetic fields.

JEE Main 2024 Solution View → 41

In a plane EM wave, the electric field oscillates sinusoidally at a frequency of 5 × 10 10 Hz and an amplitude of 50 V m – 1 . The total average energy density of the electromagnet

JEE Main 2024 Solution View → 42

Match List I with List II List I List II A. Gauss’s law of magnetostatics i. ∮ E → · d a → = 1 ε 0 ∫ ρ d V B. Faraday’s law of electro magnetic induction ii. ∮ B → · d a → = 0 C. A

JEE Main 2024 Solution View → 43

The electric field of an electromagnetic wave in free space is represented as E → = E 0 cos ( ω t - k z ) i ^ . The corresponding magnetic induction vector will be :

JEE Main 2024 Solution View → 44

A plane electromagnetic wave of frequency 35 MHz travels in free space along the X -direction. At a particular point (in space and time) E → = 9 . 6 j ^ V m - 1 . The value of magn

JEE Main 2024 Solution View → 45

An object is placed in a medium of refractive index 3 . An electromagnetic wave of intensity 6 × 10 8 W m - 2 falls normally on the object and it is absorbed completely. The radiat

JEE Main 2024 Solution View → 46

A plane electromagnetic wave propagating in x -direction is described by E y = 200 V m - 1 sin 1 . 5 × 10 7 t - 0 . 05 x ; The intensity of the wave is : (Use ϵ 0 = 8 . 85 × 10 - 1

JEE Main 2024 Solution View → 47

The electric field associated with an electromagnetic wave propagating in a dielectric medium is given by E &#8594; = 30 2 x &#8743; + y &#8743; sin 2 &#960; 5 &#215; 10 14 t - 10

JEE Advanced 2023 Solution View → 48

Match List-I with List II of Electromagnetic waves with corresponding wavelength range: List I List II (A) Microwave (I) 400 nm to 1 nm (B) Ultraviolet (II) 1 nm to 10 &#8211; 3 nm

JEE Main 2023 Solution View → 49

Given below are two statements: Statement I : Out of microwaves, infrared rays and ultraviolet rays, ultraviolet rays are the most effective for the emission of electrons from a me

JEE Main 2023 Solution View → 50

In an electromagnetic wave, at an instant and at a particular position, the electric field is along the negative z-axis and magnetic field is along the positive x-axis. Then the di

JEE Main 2023 Solution View → 51

Which of the following Maxwell&rsquo;s equation is valid for time varying conditions but not valid for static conditions:

JEE Main 2023 Solution View → 52

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R Assertion A : EM waves used for optical communication have longer wavelengths t

JEE Main 2023 Solution View → 53

A plane electromagnetic wave of frequency 20 MHz propagates in free space along x -direction. At a particular space and time E &#8594; = 6 . 6 j ^ V m - 1 . What is B &#8594; at th

JEE Main 2023 Solution View → 54

The amplitude of magnetic field in an electromagnetic wave propagating along y -axis is 6 . 0 &#215; 10 &#8211; 7 T . The maximum value of electric field in the electromagnetic wav

JEE Main 2023 Solution View → 55

The waves emitted when a metal target is bombarded with high energy electrons are

JEE Main 2023 Solution View → 56

The energy density associated with electric field E &#8594; and magnetic field B &#8594; of an electromagnetic wave in free space is given by ( &#949; 0 - permittivity of free spac

JEE Main 2023 Solution View → 57

The ratio of average electric energy density and total average energy density of electromagnetic wave is:

JEE Main 2023 Solution View → 58

Match the List-I with List-II: List I List II A Microwaves I Radioactive decay of the nucleus B Gamma rays II Rapid acceleration and deceleration of electron in aerials C Radio wav

JEE Main 2023 Solution View → 59

Match List I and List II List I List II A Microwaves I Physiotherapy B UV rays II Treatment of cancer C Infra-red rays III Lasik eye surgery D X-rays IV Aircraft navigation Choose

JEE Main 2023 Solution View → 60

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 magnet

JEE Main 2023 Solution View → 61

Which of the following are true? A. Speed of light in vacuum is dependent on the direction of propagation. B. Speed of light in a medium is independent of the wavelength of light.

JEE Main 2023 Solution View → 62

Match List I and List II A Gauss&rsquo;s Law in Electrostatics I &#8750; E &#8594; &#183; d l &#8594; = - d &#981; B d t B Faraday&#39;s Law II &#8750; B &#8594; &#183; d A &#8594;

JEE Main 2023 Solution View → 63

All electromagnetic wave is transporting energy in the negative z direction. At a certain point and certain time the direction of electric field of the wave is along positive y dir

JEE Main 2023 Solution View → 64

The electric field and magnetic field components of an electromagnetic wave going through vacuum is described by E x = E 0 sin k z - &#969; t B y = B 0 sin k z - &#969; t Then the

JEE Main 2023 Solution View → 65

If E &#8594; and K &#8594; represent electric field and propagation vectors of the EM waves in vacuum, then magnetic field vector is given by: ( &#969; - angular frequency)

JEE Main 2023 Solution View → 66

Match List - I with List - II List-I List-II (a) UV rays (i) Diagnostic tool in medicine (b) X -rays (ii) Water purification (c) Microwave (iii) Communication, Radar (d) Infrared w

JEE Main 2022 Solution View → 67

Sun light falls normally on a surface of area 36 cm 2 and exerts an average force of 7 . 2 &#215; 10 - 9 N within a time period of 20 minutes. Considering a case of complete absorp

JEE Main 2022 Solution View → 68

Identify the correct statements from the following descriptions of various properties of electromagnetic waves. A. In a plane electromagnetic wave electric field and magnetic field

JEE Main 2022 Solution View → 69

A beam of light travelling along X -axis is described by the electric field E y = 900 sin &#969; t - x c . The ratio of electric force to magnetic force on a charge q moving along

JEE Main 2022 Solution View → 70

The oscillating magnetic field in a plane electromagnetic wave is given by B y = 5 &#215; 10 - 6 sin 1000 &#960; 5 x - 4 &#215; 10 8 t T . The amplitude of electric field will be

JEE Main 2022 Solution View → 71

The magnetic field of a plane electromagnetic wave is given by B &#8594; = 2 &#215; 10 - 8 sin 0 . 5 &#215; 10 3 x + 1 . 5 &#215; 10 11 t j ^ T . The amplitude of the electric fiel

JEE Main 2022 Solution View → 72

Light wave travelling in air along x -direction is given by E y = 540 sin &#960; &#215; 10 4 x - c t V m - 1 . Then, the peak value of magnetic field of wave will be (Given c = 3 &

JEE Main 2022 Solution View → 73

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 _____ &#215; 10 - 9 T (Given : Permittivi

JEE Main 2022 Solution View → 74

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 el

JEE Main 2022 Solution View → 75

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

JEE Main 2022 Solution View → 76

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 in

JEE Main 2022 Solution View → 77

Which is the correct ascending order of wavelengths?

JEE Main 2022 Solution View → 78

If Electric field intensity of a uniform plane electro magnetic wave is given as E = - 301 . 6 sin k z - &#969; t a ^ x + 452 . 4 sin k z - &#969; t a ^ y V m - 1 . Then, magnetic

JEE Main 2022 Solution View → 79

The electromagnetic waves travel in a medium at a speed of 2 . 0 &#215; 10 8 m s - 1 . The relative permeability of the medium is 1 . 0 . The relative permittivity of the medium wi

JEE Main 2022 Solution View → 80

The electric field in an electromagnetic wave is given by E = 56 . 5 sin &#969; t - x c NC - 1 . Find the intensity of the wave if it is propagating along x -axis in the free space

JEE Main 2022 Solution View → 81

An electric bulb is rated as 200 W . What will be the peak magnetic field at 4 m distance produced by the radiations coming from this bulb? Consider this bulb as a point source wit

JEE Main 2022 Solution View → 82

A plane electromagnetic wave travels in a medium of relative permeability 1 . 61 and relative permittivity 6 . 44 . If magnitude of magnetic intensity is 4 . 5 &#215; 10 - 2 A m -

JEE Main 2022 Solution View → 83

There are two infinitely long straight current-carrying conductors and they are held at right angles to each other so that their common ends meet at the origin as shown in the figu

JEE Main 2021 Solution View → 84

The magnetic field vector of an electromagnetic wave is given by B = B 0 i ^ + j ^ 2 cos k z - &#969; t where i ^ , j ^ represents unit vector along x and y -axis respectively. At

JEE Main 2021 Solution View → 85

The electric field in an electromagnetic wave is given by E = 50 &#160; N &#160; C - 1 sin &#969; ( t - x c ) The energy contained in a cylinder of volume V is 5 . 5 &#215; 10 - 12

JEE Main 2021 Solution View → 86

A plane electromagnetic wave with a frequency of 30 MHz travels in free space. At a particular point in space and time, the electric field is 6 V m - 1 . The magnetic field at this

JEE Main 2021 Solution View → 87

The electric field in a plane electromagnetic wave is given by, E = 50 sin 500 x - 10 &#215; 10 10 t &#160; V &#160; m - 1 . The velocity of an electromagnetic wave in this medium

JEE Main 2021 Solution View → 88

A light beam is described by E = 800 sin &#969; t - x c . An electron is allowed to move normal to the propagation of light beam with a speed of 3 &#215; 10 7 m s - 1 . What is the

JEE Main 2021 Solution View → 89

The electric field in a plane electromagnetic wave is given by E &#8594; = 200 cos 0 . 5 &#215; 10 3 m - 1 x - 1 . 5 &#215; 10 11 rad s - 1 t V m - 1 j ^ . If this wave falls norma

JEE Main 2021 Solution View → 90

A linearly polarised electromagnetic wave in vacuum is E = 3 . 1 cos 1 . 8 z - 5 . 4 &#215; 10 6 t i ^ N C - 1 is incident normally on a perfectly reflecting wall at z = a . Choose

JEE Main 2021 Solution View → 91

Intensity of sunlight is observed as 0 . 092 Wm - 2 at a point in free space. What will be the peak value of magnetic field at that point ? &#949; 0 = 8 . 85 &#215; 10 - 12 C 2 N -

JEE Main 2021 Solution View → 92

In an electromagnetic wave, the electric field vector and magnetic field vector are given as E &#8594; = E 0 i ^ and B &#8594; = B 0 k ^ , respectively. The direction of propagatio

JEE Main 2021 Solution View → 93

A plane electromagnetic wave propagating along y-direction can have the following pair of electric field ( E &#8594; ) and magnetic field ( B &#8594; ) components.

JEE Main 2021 Solution View → 94

A plane electromagnetic wave of frequency 100 MHz is traveling in a vacuum along the x - direction. At a particular point in space and time, B &#8594; = 2 . 0 &#215; 10 - 8 k ^ T &

JEE Main 2021 Solution View → 95

If 2 . 5 &#215; 10 - 6 N average force is exerted by a light wave on a non-reflecting surface of 30 cm 2 area during 40 min of time span, the energy flux of light just before it fa

JEE Main 2021 Solution View → 96

Red light differs from blue light as they have :

JEE Main 2021 Solution View → 97

A plane electromagnetic wave of frequency 500 MHz is traveling in a vacuum along the y - direction. At a particular point in space and time, B &#8594; = 8 . 0 &#215; 10 - 8 z ^ T .

JEE Main 2021 Solution View → 98

For an electromagnetic wave travelling in free space, the relation between average energy densities due to electric U e and magnetic U m fields is :

JEE Main 2021 Solution View → 99

A radiation is emitted by 1000 W bulb and it generates an electric field and magnetic field at P , placed at a distance of 2 m . The efficiency of the bulb is 1 . 25 % . The value

JEE Main 2021 Solution View → 100

The wavelength of an X-ray beam is 10 &#8491; . The mass of a fictitious particle having the same energy as that of the X-ray photons is x 3 h kg . The value of x is ___ . ( h = Pl

JEE Main 2021 Solution View → 101

An X-ray tube is operated at 1 . 24 million volt. The shortest wavelength of the produced photon will be:

JEE Main 2021 Solution View → 102

Match List - I with List - II. List-I List-II (a) Source of microwave frequency (i) Radioactive decay of nucleus (b) Source of infrared frequency (ii) Magnetron (c) Source of Gamma

JEE Main 2021 Solution View → 103

An electromagnetic wave of frequency 3 GHz enters a dielectric medium of relative electric permittivity 2 . 25 from vacuum. The wavelength of this wave in that medium will be _____

JEE Main 2021 Solution View → 104

An electromagnetic wave of frequency 5 GHz , is travelling in a medium whose relative electric permittivity and relative magnetic permeability both are 2 . Its velocity in this med

JEE Main 2021 Solution View → 105

In an X -ray tube, electrons emitted from a filament (cathode) carrying current I hit a target (anode) at a distance d from the cathode. The target is kept at a potential V higher

JEE Advanced 2020 Solution View → 106

For a plane electromagnetic wave, the magnetic field at a point x and time t is : B &#8594; x , &#8201; t = 1 .2 &#215; 10 &#8722; 7 sin 0 .5 &#215; 10 3 x + 1 .5 &#215; 10 11 t k

JEE Main 2020 Solution View → 107

The correct match between the entries in column I and column II are : I II Radiation Wavelength a Microwave i 100 m b Gamma rays ii 10 - 15 m c A.M. radio iii 10 - 10 m d X&ndash;r

JEE Main 2020 Solution View → 108

The electric field of a plane electromagnetic wave is given by E &#8594; = E 0 x ^ + y ^ sin k z - &#969; t . Its magnetic field will be given by

JEE Main 2020 Solution View → 109

Choose the correct option relating wavelengths of different parts of electromagnetic wave spectrum:

JEE Main 2020 Solution View → 110

The electric field of a plane electromagnetic wave propagating along the x direction in vacuum is E &#8594; = E 0 jcos ( &#969; t - kx ) . The magnetic field B &#8594; , at the mom

JEE Main 2020 Solution View → 111

Two sources of light emit X-rays of wavelength 1 nm and visible light of wavelength 500 nm, respectively. Both the sources emit light of the same power 200 W. The ratio of the numb

JEE Main 2020 Solution View → 112

The magnetic field of a plane electromagnetic wave is B &#8594; = 3 &#215; 10 - 8 sin 200 &#960; ( y + c t ) i ^ T . Where, c = 3 &#215; 10 8 m s - 1 is the speed of light the corr

JEE Main 2020 Solution View → 113

In a plane electromagnetic wave, the directions of electric field and magnetic field are represented by k ^ and 2 i ^ - 2 j ^ , respectively. What is the unit vector along directio

JEE Main 2020 Solution View → 114

A plane electromagnetic wave, has frequency of 2 . 0 &#215; 10 10 Hz and its energy density is 1 . 02 &#215; 10 - 8 J m - 3 in vacuum. The amplitude of the magnetic field of the wa

JEE Main 2020 Solution View → 115

A plane electromagnetic wave is propagating along the direction i ^ + j ^ 2 , with its polarization along the direction k . ^ The correct form of the magnetic field of the wave wou

JEE Main 2020 Solution View → 116

The electric fields of two plane electromagnetic plane waves in vacuum are given by E 1 &#8594; = E 0 j ^ cos &#8289; &#969; t - k x and E 2 &#8594; = E 0 k ^ cos &#8289; &#969; t

JEE Main 2020 Solution View → 117

A plane electromagnetic wave of frequency 25 G H z is propagating in vacuum along the z-direction. At a particular point in space and time, the magnetic filed is given by B &#8594;

JEE Main 2020 Solution View → 118

If the magnetic field in a plane electromagnetic wave is given by B &#8594; = 3 &#215; 10 - 8 sin &#8289; 1.6 &#215; 10 3 x + 48 &#215; 10 10 t j ^ T , then what will be expression

JEE Main 2020 Solution View → 119

A laser beam of power 27 &#160; mW has a cross-sectional area of 10 &#160; mm 2 . The magnitude of the maximum electric field in this electromagnetic wave is given by [Take &#949;

NTA Abhyas JEE Main 2020 Solution View → 120

Name the EM wave used for studying crystal structure of solids

NTA Abhyas JEE Main 2020 Solution View →
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