# Electromagnetic Waves · Physics · JEE Main

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JEE Main 2014 (Online) 9th April Morning Slot
Match List I (Wavelength range of electromagnetic spectrum) with List II. (Method of production of these waves) and select the correct option from th...
JEE Main 2014 (Online) 11th April Morning Slot
An electromagnetic wave of frequency 1 $$\times$$ 1014 hertz is propagating along z - axis. The amplitude of electric field is 4 V/m. If $$\in$$0...
JEE Main 2014 (Online) 11th April Morning Slot
Match the List - I (Phenomenon associated with electromagnetic radiation) with List - II (Part of electromagnetic spectrum) and select the correct cod...
JEE Main 2014 (Online) 12th April Morning Slot
A lamp emits monochromatic green light uniformly in all directions. The lamp is 3% efficient in converting electrical power to electromagnetic waves a...
JEE Main 2014 (Online) 19th April Morning Slot
If microwaves, X rays, infracted, gamma rays, ultra-violet, radio waves and visible parts of the electromagnetic spectrum by M, X, I, G, U, R and V, ...
JEE Main 2015 (Online) 10th April Morning Slot
An electromagnetic wave travelling in the x-direction has frequency of 23 $$\times$$ 1014 Hz and electric field amplitude of 27 Vm$$-$$1. From the o...
JEE Main 2015 (Online) 11th April Morning Slot
For plane electromagnetic waves propagating in the z direction, which one of the following combination gives the correct possible direction for $$\... JEE Main 2024 (Online) 9th April Evening Shift The magnetic field in a plane electromagnetic wave is$$\mathrm{B}_{\mathrm{y}}=\left(3.5 \times 10^{-7}\right) \sin \left(1.5 \times 10^3 x+0.5 \time...
JEE Main 2024 (Online) 9th April Morning Shift
A plane EM wave is propagating along $$x$$ direction. It has a wavelength of $$4 \mathrm{~mm}$$. If electric field is in $$y$$ direction with the maxi...
JEE Main 2024 (Online) 8th April Morning Shift
Average force exerted on a non-reflecting surface at normal incidence is $$2.4 \times 10^{-4} \mathrm{~N}$$. If $$360 \mathrm{~W} / \mathrm{cm}^2$$ is...
JEE Main 2024 (Online) 6th April Evening Shift
In the given electromagnetic wave $$\mathrm{E}_{\mathrm{y}}=600 \sin (\omega t-\mathrm{kx}) \mathrm{Vm}^{-1}$$, intensity of the associated light beam...
JEE Main 2024 (Online) 6th April Morning Shift
Electromagnetic waves travel in a medium with speed of $$1.5 \times 10^8 \mathrm{~m} \mathrm{~s}^{-1}$$. The relative permeability of the medium is 2....
JEE Main 2024 (Online) 5th April Evening Shift
Match List I with List II : .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border-style:solid;border-width:1px;font-fami...
JEE Main 2024 (Online) 4th April Evening Shift
Arrange the following in the ascending order of wavelength: A. Gamma rays $$\left(\lambda_1\right)$$ B. $$x$$ - rays $$\left(\lambda_2\right)$$ C. Inf...
JEE Main 2024 (Online) 4th April Morning Shift
The electric field in an electromagnetic wave is given by $$\overrightarrow{\mathrm{E}}=\hat{i} 40 \cos \omega(\mathrm{t}-z / \mathrm{c}) \mathrm{NC}^... JEE Main 2024 (Online) 1st February Evening Shift If frequency of electromagnetic wave is 60 \mathrm{~MHz} and it travels in air along z direction then the corresponding electric and magnetic fiel... JEE Main 2024 (Online) 31st January Evening Shift Given below are two statements: Statement I: Electromagnetic waves carry energy as they travel through space and this energy is equally shared by the ... JEE Main 2024 (Online) 31st January Morning Shift In a plane EM wave, the electric field oscillates sinusoidally at a frequency of$$5 \times 10^{10} \mathrm{~Hz}$$and an amplitude of$$50 \mathrm{~V...
JEE Main 2024 (Online) 30th January Morning Shift
The electric field of an electromagnetic wave in free space is represented as $$\overrightarrow{\mathrm{E}}=\mathrm{E}_0 \cos (\omega \mathrm{t}-\math... JEE Main 2024 (Online) 29th January Evening Shift A plane electromagnetic wave of frequency$$35 \mathrm{~MHz}$$travels in free space along the$$X$$-direction. At a particular point (in space and ti... JEE Main 2024 (Online) 27th January Evening Shift An object is placed in a medium of refractive index 3 . An electromagnetic wave of intensity$$6 \times 10^8 \mathrm{~W} / \mathrm{m}^2$$falls normal... JEE Main 2024 (Online) 27th January Morning Shift A plane electromagnetic wave propagating in$$\mathrm{x}$$-direction is described by$$E_y=\left(200 \mathrm{Vm}^{-1}\right) \sin \left[1.5 \times 10^...
JEE Main 2023 (Online) 15th April Morning Shift
Match List I with List II of Electromagnetic waves with corresponding wavelength range : .tg {border-collapse:collapse;border-spacing:0;width:100%} ...
JEE Main 2023 (Online) 13th April Evening Shift
In an electromagnetic wave, at an instant and at particular position, the electric field is along the negative $$z$$-axis and magnetic field is along ...
JEE Main 2023 (Online) 13th April Morning Shift
Which of the following Maxwell's equation is valid for time varying conditions but not valid for static conditions :
JEE Main 2023 (Online) 12th April Morning Shift
Given below are two statements: one is labelled as Assertion $$\mathbf{A}$$ and the other is labelled as Reason $$\mathbf{R}$$ Assertion A : EM waves ...
JEE Main 2023 (Online) 11th April Evening Shift
A plane electromagnetic wave of frequency $$20 ~\mathrm{MHz}$$ propagates in free space along $$\mathrm{x}$$-direction. At a particular space and time...
JEE Main 2023 (Online) 11th April Morning Shift
The electric field in an electromagnetic wave is given as $$\overrightarrow{\mathrm{E}}=20 \sin \omega\left(\mathrm{t}-\frac{x}{\mathrm{c}}\right) \ov... JEE Main 2023 (Online) 10th April Evening Shift The amplitude of magnetic field in an electromagnetic wave propagating along y-axis is$$6.0 \times 10^{-7} \mathrm{~T}$$. The maximum value of electr... JEE Main 2023 (Online) 10th April Morning Shift The energy of an electromagnetic wave contained in a small volume oscillates with JEE Main 2023 (Online) 6th April Evening Shift The energy density associated with electric field$$\vec{E}$$and magnetic field$$\vec{B}$$of an electromagnetic wave in free space is given by$$\l...
JEE Main 2023 (Online) 6th April Morning Shift
For the plane electromagnetic wave given by $$E=E_{0} \sin (\omega t-k x)$$ and $$B=B_{0} \sin (\omega t-k x)$$, the ratio of average electric energy ...
JEE Main 2023 (Online) 1st February Evening Shift
The ratio of average electric energy density and total average energy density of electromagnetic wave is :
JEE Main 2023 (Online) 1st February Morning Shift
Match List I with List II : .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border-style:solid;border-width:1px;font-fami...
JEE Main 2023 (Online) 31st January Evening Shift
Match List I with List II .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border-style:solid;border-width:1px;font-family...
JEE Main 2023 (Online) 30th January Evening Shift
A point source of $100 \mathrm{~W}$ emits light with $5 \%$ efficiency. At a distance of $5 \mathrm{~m}$ from the source, the intensity produced by th...
JEE Main 2023 (Online) 29th January Evening Shift
Given below are two statements : Statement I : Electromagnetic waves are not deflected by electric and magnetic field. Statement II : The amplitude of...
JEE Main 2023 (Online) 29th January Morning Shift
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 independen...
JEE Main 2023 (Online) 25th January Evening Shift
Match List I with List II .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border-style:solid;border-width:1px;font-family...
JEE Main 2023 (Online) 25th January Morning Shift
An electromagnetic wave is transporting energy in the negative $$z$$ direction. At a certain point and certain time the direction of electric field of...
JEE Main 2023 (Online) 24th January Evening Shift
The electric field and magnetic field components of an electromagnetic wave going through vacuum is described by $$\mathrm{{E_x} = {E_o}\sin (kz - \om... JEE Main 2023 (Online) 24th January Morning Shift In$$\overrightarrow E $$and$$\overrightarrow K $$represent electric field and propagation vectors of the EM waves in vacuum, then magnetic field v... JEE Main 2022 (Online) 29th July Morning Shift Match List - I with List - II : .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border-style:solid;border-width:1px;font-... JEE Main 2022 (Online) 28th July Evening Shift Sun light falls normally on a surface of area$$36 \mathrm{~cm}^{2}$$and exerts an average force of$$7.2 \times 10^{-9} \mathrm{~N}$$within a time ... JEE Main 2022 (Online) 27th July Evening Shift Identify the correct statements from the following descriptions of various properties of electromagnetic waves. (A) In a plane electromagnetic wave el... JEE Main 2022 (Online) 27th July Morning Shift A beam of light travelling along$$X$$-axis is described by the electric field$$E_{y}=900 \sin \omega(\mathrm{t}-x / c)$$. The ratio of electric forc... JEE Main 2022 (Online) 26th July Evening Shift The oscillating magnetic field in a plane electromagnetic wave is given by$$B_{y}=5 \times 10^{-6} \sin 1000 \pi\left(5 x-4 \times 10^{8} t\right) T$... JEE Main 2022 (Online) 26th July Evening Shift A velocity selector consists of electric field $$\vec{E}=E \,\hat{k}$$ and magnetic field $$\vec{B}=B \,\hat{j}$$ with $$B=12 \,m T$$. The value of $$... JEE Main 2022 (Online) 26th July Morning Shift The magnetic field of a plane electromagnetic wave is given by :$$ \overrightarrow{\mathrm{B}}=2 \times 10^{-8} \sin \left(0.5 \times 10^{3} x+1.5 \t... JEE Main 2022 (Online) 25th July Evening Shift Light wave travelling in air along x-direction is given by $${E_y} = 540\sin \pi \times {10^4}(x - ct)\,V{m^{ - 1}}$$. Then, the peak value of magnet... JEE Main 2022 (Online) 25th July Morning Shift The rms value of conduction current in a parallel plate capacitor is $$6.9 \,\mu \mathrm{A}$$. The capacity of this capacitor, if it is connected to$...
JEE Main 2022 (Online) 30th June Morning Shift
An expression for oscillating electric field in a plane electromagnetic wave is given as Ez = 300 sin(5$$\pi$$ $$\times$$ 103x $$-$$ 3$$\pi$$ $$\times... JEE Main 2022 (Online) 28th June Evening Shift An EM wave propagating in x-direction has a wavelength of 8 mm. The electric field vibrating y-direction has maximum magnitude of 60 Vm$$-$$1. Choose ... JEE Main 2022 (Online) 28th June Morning Shift A radar sends an electromagnetic signal of electric field (E0) = 2.25 V/m and magnetic field (B0) = 1.5$$\times$$10$$-$$8 T which strikes a target o... JEE Main 2022 (Online) 27th June Evening Shift Given below are two statements : Statement I : A time varying electric field is a source of changing magnetic field and vice-versa. Thus a disturbance... JEE Main 2022 (Online) 27th June Morning Shift Match List-I with List-II : .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border-style:solid;border-width:1px;font-fami... JEE Main 2022 (Online) 26th June Evening Shift Which is the correct ascending order of wavelengths? JEE Main 2022 (Online) 26th June Morning Shift If Electric field intensity of a uniform plane electromagnetic wave is given as$$E = - 301.6\sin (kz - \omega t){\widehat a_x} + 452.4\sin (kz - \om...
JEE Main 2022 (Online) 26th June Morning Shift
In free space, an electromagnetic wave of 3 GHz frequency strikes over the edge of an object of size $${\lambda \over {100}}$$, where $$\lambda$$ is ...
JEE Main 2022 (Online) 25th June Evening Shift
The electromagnetic waves travel in a medium at a speed of 2.0 $$\times$$ 108 m/s. The relative permeability of the medium is 1.0. The relative permit...
JEE Main 2022 (Online) 25th June Morning Shift
The electric field in an electromagnetic wave is given by E = 56.5 sin $$\omega$$(t $$-$$ x/c) NC$$-$$1. Find the intensity of the wave if it is propa...
JEE Main 2022 (Online) 24th June Evening Shift
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 th...
JEE Main 2022 (Online) 24th June Morning Shift
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...
JEE Main 2021 (Online) 1st September Evening Shift
Electric field of plane electromagnetic wave propagating through a non-magnetic medium is given by E = 20cos(2 $$\times$$ 1010 t $$-$$ 200x) V/m. The ...
JEE Main 2021 (Online) 31st August Evening Shift
The magnetic field vector of an electromagnetic wave is given by $$B = {B_0}{{\widehat i + \widehat j} \over {\sqrt 2 }}\cos (kz - \omega t)$$; where ...
JEE Main 2021 (Online) 27th August Morning Shift
Electric field in a plane electromagnetic wave is given by E = 50 sin(500x $$-$$ 10 $$\times$$ 1010 t) V/m The velocity of electromagnetic wave in thi...
JEE Main 2021 (Online) 26th August Evening Shift
A light beam is described by $$E = 800\sin \omega \left( {t - {x \over c}} \right)$$. An electron is allowed to move normal to the propagation of ligh...
JEE Main 2021 (Online) 27th July Morning Shift
The relative permittivity of distilled water is 81. The velocity of light in it will be :(Given $$\mu$$r = 1)
JEE Main 2021 (Online) 25th July Morning Shift
A linearly polarized electromagnetic wave in vacuum is $$E = 3.1\cos \left[ {(1.8)z - (5.4 \times {{10}^6})t} \right]\widehat iN/C$$is incident normal...
JEE Main 2021 (Online) 22th July Evening Shift
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 the point?($${\varepsil... JEE Main 2021 (Online) 20th July Evening Shift In an electromagnetic wave the electric field vector and magnetic field vector are given as$$\overrightarrow E = {E_0}\widehat i$$and$$\overrighta...
JEE Main 2021 (Online) 18th March Evening Shift
A plane electromagnetic wave propagating along y-direction can have the following pair of electric field $$\left( {\overrightarrow E } \right)$$ and m...
JEE Main 2021 (Online) 18th March Morning Shift
A plane electromagnetic wave of frequency 100 MHz is travelling in vacuum along the x-direction. At a particular point in space and time, $$\overright... JEE Main 2021 (Online) 16th March Morning Shift A plane electromagnetic wave of frequency 500 MHz is travelling in vacuum along y-direction. At a particular point in space and time,$$\overrightarro...
JEE Main 2021 (Online) 16th March Morning Shift
For an electromagnetic wave travelling in free space, the relation between average energy densities due to electric (Ue) and magnetic (Um) fields is :...
JEE Main 2021 (Online) 24th February Evening Shift
Match List - I with List - II. List I List II (a) Source of microwave frequency (i) Radioactive decay of...
JEE Main 2020 (Online) 6th September Evening Slot
For a plane electromagnetic wave, the magnetic field at a point x and time t is $$\overrightarrow B \left( {x,t} \right)$$ = $$\left[ {1.2 \times {{10... JEE Main 2020 (Online) 5th September Evening Slot The correct match between the entries in column I and column II are : .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;bor... JEE Main 2020 (Online) 5th September Morning Slot An electron is constrained to move along the y-axis with a speed of 0.1 c (c is the speed of light) in the presence of electromagnetic wave, whose ele... JEE Main 2020 (Online) 4th September Evening Slot The electric field of a plane electromagnetic wave is given by$$\overrightarrow E = {E_0}\left( {\widehat x + \widehat y} \right)\sin \left( {kz - \...
JEE Main 2020 (Online) 4th September Morning Slot
Choose the correct option relating wave lengths of different parts of electromagnetic wave spectrum:
JEE Main 2020 (Online) 3rd September Evening Slot
The electric field of a plane electromagnetic wave propagating along the x direction in vacuum is $$\overrightarrow E = {E_0}\widehat j\cos \left( {\... JEE Main 2020 (Online) 3rd September Morning Slot The magnetic field of a plane electromagnetic wave is$$\overrightarrow B = 3 \times {10^{ - 8}}\sin \left[ {200\pi \left( {y + ct} \right)} \right]\...
JEE Main 2020 (Online) 2nd September Evening Slot
In a plane electromagnetic wave, the directions of electric field and magnetic field are represented by $$\widehat k$$ and $$2\widehat i - 2\widehat j... JEE Main 2020 (Online) 2nd September Morning Slot A plane electromagnetic wave, has frequency of 2.0$$ \times $$1010 Hz and its energy density is 1.02$$ \times $$10–8 J/m3 in vacuum. The amplitude... JEE Main 2020 (Online) 9th January Evening Slot A plane electromagnetic wave is propagating along the direction$${{\widehat i + \widehat j} \over {\sqrt 2 }}$$, with its polarization along the dir... JEE Main 2020 (Online) 9th January Morning Slot The electric fields of two plane electromagnetic plane waves in vacuum are given by$$\overrightarrow {{E_1}} = {E_0}\widehat j\cos \left( {\omega t ...
JEE Main 2020 (Online) 8th January Evening Slot
A plane electromagnetic wave of frequency 25 GHz is propagating in vacuum along the z-direction. At a particular point in space and time, the magnetic...
JEE Main 2020 (Online) 7th January Evening Slot
The electric field of a plane electromagnetic wave is given by $$\overrightarrow E = {E_0}{{\widehat i + \widehat j} \over {\sqrt 2 }}\cos \left( {kz... JEE Main 2020 (Online) 7th January Morning Slot If the magnetic field in a plane electromagnetic wave is given by$$\overrightarrow B $$= 3$$ \times $$10-8 sin(1.6$$ \times $$103x + 48$$ \time...
JEE Main 2019 (Online) 12th April Evening Slot
A plane electromagnetic wave having a frequency v = 23.9 GHz propagates along the positive z-direction in free space. The peak value of the Electric F...
JEE Main 2019 (Online) 12th April Morning Slot
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