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Electromagnetic Waves — NEET UG Physics PYQs

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

232 questionsPhysicsSolutions on every page
1

A parallel-plate capacitor of 50 F contains a dielectric slab of constant ( k ) with the same dimensions. If a time-varying potential difference is applied at a rate of 50 V/s . Wh

MHT CET Medical 2026 Solution View → 2

An electromagnetic wave travelling in a lossless dielectric medium having a dielectric constant, _r=9 , has the electric field, E_x=E₀ (kz-2 10^6 t) Vm ⁻¹ where E₀ is the amplitude

NEET 2026 Solution View → 3

Match List I with List II : List I (Electromagnetic wave) List II (Production) A. Microwave I. Electrons in atoms emit light when they move from a higher energy level to a lower en

NEET 2026 Solution View → 4

The following table presents the part of the electromagnetic spectrum and their corresponding major applications. Part of the electromagnetic spectrum Applications P. Microwave I.

NEET 2026 Solution View → 5

A parallel plate capacitor made of circular plates is being charged such that the surface charge density on its plates is increasing at a constant rate with time. The magnetic fiel

NEET 2025 Solution View → 6

The electric field in a plane electromagnetic wave is given by E_z=60 (5 x +1.5 10^9 t ) V / m . Then expression for the corresponding magnetic field is (here subscripts denote the

NEET 2025 Solution View → 7

A parallel plate capacitor is charged by connecting it to a battery through a resistor. If I is the current in the circuit, then in the gap between the plates:

NEET 2024 Solution View → 8

The electromagnetic radiation which has the smallest wavelength are

NEET 2024 Solution View → 9

The property which is not of an electromagnetic wave travelling in free space is that:

NEET 2024 Solution View → 10

To produce an instantaneous displacement current of 2 ~mA in the space between the parallel plates of a capacitor of capacitance 4 F , the rate of change of applied variable potent

NEET 2023 Solution View → 11

In a plane electromagnetic wave travelling in free space, the electric field component oscillates sinusoidally at a frequency of 2 . 0 × 10 10   Hz and amplitude 48 &#160

NEET 2023 Solution View → 12

The magnetic field of a plane electromagnetic wave is given by B =3 10⁻⁸ (1.6 10^3 x+ .48 10¹⁰ t) j , then the associated electric field will be:

NEET 2022 Solution View → 13

When light propagates through a material medium of relative permittivity ϵ r and relative permeability μ r , the velocity of light, v is given by : ( c - velocity of lig

NEET 2022 Solution View → 14

Match List - I with List - II: List - I (Electromagnetic waves) List - II (Wavelength) (a) AM radio waves (i) 10 - 10   m (b) Microwaves (ii) 10 2   m (c) Infrared radiat

NEET 2022 Solution View → 15

The ratio of the magnitude of the magnetic field and electric field intensity of a plane electromagnetic wave in free space of permeability ₀ and permittivity ₀ is (Given that c -

NEET 2022 Solution View → 16

For a plane electromagnetic wave propagating in x -direction, which one of the following combinations gives the correct possible directions for the electric field ( E ) and magneti

NEET 2021 Solution View → 17

A capacitor of capacitance C , is connected across an ac source of voltage V , given by V = V 0 sin ω t . The displacement current between the plates of the capacitor would th

NEET 2021 Solution View → 18

The wave nature of electrons was experimentally verified by,

NEET 2020 Solution View → 19

Light with an average flux of 20   W   cm - 2 falls on a non-reflecting surface at normal incidence having surface area 20   cm 2 . The energy received by the surfac

NEET 2020 Solution View → 20

The ratio of contributions made by the electric field and magnetic field components to the intensity of an electromagnetic wave is: ( c = speed of electromagnetic waves)

NEET 2020 Solution View → 21

The E.M. wave with shortest wavelength among the following is

NEET 2020 Solution View → 22

The magnetic field in a plane electromagnetic wave is given by: B y = 2 × 10 - 7 sin π × 10 3 x + 3 π × 10 11 t   T . Calculate the wavelength.

NEET 2020 Solution View → 23

Potential difference is given as V(x)=-x^2 y volt. Find electric field at a point (1,2) ?

JIPMER 2019 Solution View → 24

For a transparent medium relative permeability and permittivity _ r and _ r are 1.0 and 1.44 respectively. The velocity of light in this medium would be

NEET 2019 Solution View → 25

Which colour of the light has the longest wavelength?

NEET 2019 Solution View → 26

Assertion : The energy of X-ray photon is greater than that of light (visible) photon. Reason : X-ray photon in vacuum travels faster than light photon.

AIIMS 2018 Solution View → 27

Assume that a radio station is about 200 ~km away from your location and the station operates at 972 kHz . How long does it take for an electromagnetic signal to travel from the st

AIIMS 2018 Solution View → 28

Assertion : When an electron beam strikes the target in an X-ray tube, part of the kinetic energy is converted into X-ray energy. Reason : If the accelerating potential in an X -ra

AIIMS 2018 Solution View → 29

The charge of a parallel plate capacitor is varying as q=q₀ 2 v t . The plates are very large and close together. Neglecting edge effects, the displacement current through the capa

AIIMS 2018 Solution View → 30

An EM wave is propagating in a medium with a velocity V → = V   i ^ . The instantaneous oscillating electric field of this em wave is along + y axis. Then the direction

NEET 2018 Solution View → 31

Assume that a radio station is about 200 ~km away from your location and the station operates at 972 kHz . How long does it take for an electromagnetic signal to travel from the st

NEET 2018 Solution View → 32

Assertion : When an electron beam strikes the target in an X-ray tube, part of the kinetic energy is converted into X-ray energy. Reason : If the accelerating potential in an X -ra

NEET 2018 Solution View → 33

The charge of a parallel plate capacitor is varying as q=q₀ 2 v t . The plates are very large and close together. Neglecting edge effects, the displacement current through the capa

NEET 2018 Solution View → 34

Assertion : The energy of X-ray photon is greater than that of light (visible) photon. Reason : X-ray photon in vacuum travels faster than light photon.

NEET 2018 Solution View → 35

A piece of blue glass heated to a high temperature and a piece of red glass at room temperature are taken inside a dimly-lit room. Then,

JIPMER 2017 Solution View → 36

In an electromagnetic wave in free space the root mean square value of the electric field is E r m s = 6   V   m - 1 . The peak value of the magnetic field is

NEET 2017 Solution View → 37

Assertion : When a charged particle moves in a circular path. It produces electromagnetic wave. Reason : Charged particle has acceleration.

AIIMS 2016 Solution View → 38

Assertion : The electromagnetic waves are transverse in nature. Reason : Waves of wavelength 10 m are radiowave and microwave.

AIIMS 2016 Solution View → 39

A beam of light travelling along X -axis is described by the electric field E_Y=600 V m . (t- x c ) , the maximum magnetic force on a charge q=2 e , moving along Y -axis with the s

JIPMER 2016 Solution View → 40

Out of the following options which one can be used to produce a propagating electromagnetic wave?

NEET 2016 Solution View → 41

Assertion : The electromagnetic waves are transverse in nature. Reason : Waves of wavelength 10 m are radiowave and microwave.

NEET 2016 Solution View → 42

Assertion : When a charged particle moves in a circular path. It produces electromagnetic wave. Reason : Charged particle has acceleration.

NEET 2016 Solution View → 43

The temperature of an object that emits electromagnetic radiation must be

AIIMS 2015 Solution View → 44

The de-Broglie wavelength of electron falling on the target in an X-ray tube is . The cut-off wavelength of the emitted X-ray is

JIPMER 2015 Solution View → 45

The energy of the em waves is of the order of 15   keV . To which part of the spectrum does it belong?

NEET 2015 Solution View → 46

A radiation of energy E falls normally on a perfectly reflecting surface. The momentum transferred to the surface is ( C = Velocity of light)

NEET 2015 Solution View → 47

The temperature of an object that emits electromagnetic radiation must be

NEET 2015 Solution View → 48

Assertion: Static crashes are heard on radio, when lightning flash occurs in the sky. Reason: Electromagnetic waves having frequency of radio wave range interfere with radio waves.

AIIMS 2014 Solution View → 49

Light with an energy flux of 25 × 10 4   W   m - 2 falls on a perfectly reflecting surface at normal incidence. If the surface area is 15   c m 2 , the average

NEET 2014 Solution View → 50

Assertion: Static crashes are heard on radio, when lightning flash occurs in the sky. Reason: Electromagnetic waves having frequency of radio wave range interfere with radio waves.

NEET 2014 Solution View → 51

Assertion : Electromagnetic radiations exert pressure. Reason : Electromagnetic-waves carry both momentum and energy.

AIIMS 2013 Solution View → 52

Astronomical wavelength increase due todoppler effect known as

AIIMS 2013 Solution View → 53

Assertion : A laser beam of 0.2 ~W power can drill holes through a metal sheet, whereas a 1000 ~W torch-light cannot. Reason : The frequency of laser light is much higher than that

AIIMS 2013 Solution View → 54

An electromagnetic wave of frequency v=3.0 MHz passes from vacuum into a dielectric medium with relative permittivity =4.0 Then:

NEET 2013 Solution View → 55

The condition under which a microwave oven heats up a food item containing water molecules most efficiently is

NEET 2013 Solution View → 56

Astronomical wavelength increase due todoppler effect known as

NEET 2013 Solution View → 57

Assertion : A laser beam of 0.2 ~W power can drill holes through a metal sheet, whereas a 1000 ~W torch-light cannot. Reason : The frequency of laser light is much higher than that

NEET 2013 Solution View → 58

Assertion : Electromagnetic radiations exert pressure. Reason : Electromagnetic-waves carry both momentum and energy.

NEET 2013 Solution View → 59

The frequency order for X -rays (A), -rays (B) , UV rays (C) is

AIIMS 2012 Solution View → 60

Assertion : In electromagnetic waves electric field and magnetic field lines are perpendicular to each other. Reason : Electric field and magnetic field are self sustaining.

AIIMS 2012 Solution View → 61

The electric field associated with an electro magnetic wave in vacuum is given by E = i 40 (k z-6 10^8 t ) , where E , z and t are in volt/m, metre and second respectively. The val

NEET 2012 Solution View → 62

The ratio of amplitude of magnetic field to the amplitude of electric field for an electromagnetic wave propagating in vacuum is equal to

NEET 2012 Solution View → 63

The frequency order for X -rays (A), -rays (B) , UV rays (C) is

NEET 2012 Solution View → 64

Assertion : In electromagnetic waves electric field and magnetic field lines are perpendicular to each other. Reason : Electric field and magnetic field are self sustaining.

NEET 2012 Solution View → 65

The electric and the magnetic field, associated with an electromagnetic wave, propagating along the +z -axis, can be represented by

NEET 2011 Solution View → 66

The decreasing order of wavelength of infrared, microwave, ultraviolet and gamma rays is

NEET 2011 Solution View → 67

Assertion : Electromagnetic waves are transverse in nature Reason : The electric and magnetic fields of an e.m. wave are perpendicular to each other and also perpendicular to the d

AIIMS 2010 Solution View → 68

Assertion : X-ray astronomy is possible only from satellites orbiting the earth. Reason : Efficiency of X-rays telescope is large as compared to any other telescope.

AIIMS 2010 Solution View → 69

Which of the following statement is false for the properties of electromagnetic waves?

NEET 2010 Solution View → 70

The electric field of an electromagnetic wave in free space is given by E =10 (10^7 t+k x ) j V / m , where t and x are in seconds and metres respectively. It can be inferred that

NEET 2010 Solution View → 71

Assertion : Electromagnetic waves are transverse in nature Reason : The electric and magnetic fields of an e.m. wave are perpendicular to each other and also perpendicular to the d

NEET 2010 Solution View → 72

Assertion : X-ray astronomy is possible only from satellites orbiting the earth. Reason : Efficiency of X-rays telescope is large as compared to any other telescope.

NEET 2010 Solution View → 73

Black holes in orbit around a normal star are detected from the earth due to the frictional heating of infalling gas into the black hole, which can reach temperatures greater than

AIIMS 2009 Solution View → 74

If v_y, v_x and v_m are the speeds of gamma rays, X -rays and microwaves respectively in vacuum, then.

AIIMS 2009 Solution View → 75

The electric field part of an electromagnetic wave in a medium is represented by ( aligned & E_x=0 & E_y=2.5 NC ⁻¹ [ (2 10^6 rad s ⁻¹ ) t - ( 10⁻² rad m ⁻¹ ) x ] & E_z=0 aligned )

NEET 2009 Solution View → 76

The electric field part of an electromagnetic wave in a medium is represented by : aligned & E _ x =0 & E _ y =2.5 N C [ (2 10^6 rad m ) t - ( 10⁻² rad s ) x ] aligned E_z=0 . The

NEET 2009 Solution View → 77

Black holes in orbit around a normal star are detected from the earth due to the frictional heating of infalling gas into the black hole, which can reach temperatures greater than

NEET 2009 Solution View → 78

If v_y, v_x and v_m are the speeds of gamma rays, X -rays and microwaves respectively in vacuum, then.

NEET 2009 Solution View → 79

Assertion : X-rays can penetrate through the flesh but not through the bones. Reason : The penetrating power of X-rays depends on voltage.

AIIMS 2008 Solution View → 80

The velocity of electromagnetic radiation in a medium of permittivity ( ₀ ) and permeability ( ₀ ) is given by

AIIMS 2008 Solution View → 81

A leaf which contains only green pigments, is illuminated by a laser light of wavelength 0.6328 m . It would appear to be

JIPMER 2008 Solution View → 82

The velocity of electromagnetic radiation in a medium of permittivity ₀ and permeability ₀ is given by

NEET 2008 Solution View → 83

The velocity of electromagnetic radiation in a medium of permittivity ₀ and permeability ₀ is given by

NEET 2008 Solution View → 84

The velocity of electromagnetic radiation in a medium of permittivity ( ₀ ) and permeability ( ₀ ) is given by

NEET 2008 Solution View → 85

Assertion : X-rays can penetrate through the flesh but not through the bones. Reason : The penetrating power of X-rays depends on voltage.

NEET 2008 Solution View → 86

( CO ₂ ) laser uses

AIIMS 2007 Solution View → 87

Assertion : Dipole oscillations produce electromagnetic waves. Reason : Accelerated charge produces electromagnetic waves.

AIIMS 2007 Solution View → 88

Which wavelength of sun is used finally as electric energy?

AIIMS 2007 Solution View → 89

If _v, _x and _m represent the wavelengths of visible light, X-rays and microwaves respectively, then

JIPMER 2007 Solution View → 90

The electric and magnetic field of an electromagnetic wave are:

NEET 2007 Solution View → 91

Which wavelength of sun is used finally as electric energy?

NEET 2007 Solution View → 92

( CO ₂ ) laser uses

NEET 2007 Solution View → 93

Assertion : Dipole oscillations produce electromagnetic waves. Reason : Accelerated charge produces electromagnetic waves.

NEET 2007 Solution View → 94

Hard X-rays for the study of fractures in bones should have a minimum wavelength of 10⁻¹¹ ~m . The accelerating voltage for electrons in X-ray machine should be

AIIMS 2006 Solution View → 95

Assertion : Standard optical diffraction gratings cannot be used for discriminating between different X -ray wavelengths. Reason : The grating spacing is not of the order of X -ray

AIIMS 2006 Solution View → 96

Who discovered X-rays ?

JIPMER 2006 Solution View → 97

Hard X-rays for the study of fractures in bones should have a minimum wavelength of 10⁻¹¹ ~m . The accelerating voltage for electrons in X-ray machine should be

NEET 2006 Solution View → 98

Assertion : Standard optical diffraction gratings cannot be used for discriminating between different X -ray wavelengths. Reason : The grating spacing is not of the order of X -ray

NEET 2006 Solution View → 99

Solid targets of different elements are bombarded by highly en ergetic electron beams. The frequency (f) of the characteristic X-rays emitted from different targets varies with ato

AIIMS 2005 Solution View → 100

The minimum wavelength of X-ray emitted by X-ray tube is 0.4125 Å . The accelerating voltage is

JIPMER 2005 Solution View → 101

If _v, _x and _m represent the wavelength of visible light, X-rays and microwaves respectively, then:

NEET 2005 Solution View → 102

Solid targets of different elements are bombarded by highly en ergetic electron beams. The frequency (f) of the characteristic X-rays emitted from different targets varies with ato

NEET 2005 Solution View → 103

Assertion : Crystalline solids can cause X-rays to diffract. Reason : Interatomic distance in crystalline solids is of the order of 0.1 ~nm .

AIIMS 2004 Solution View → 104

20 kV potential is applied across X-ray tube, the minimum wavelength of X-ray emitted will be

JIPMER 2004 Solution View → 105

Assertion : Crystalline solids can cause X-rays to diffract. Reason : Interatomic distance in crystalline solids is of the order of 0.1 ~nm .

NEET 2004 Solution View → 106

Characteristic X-rays are produced due to

AIIMS 2003 Solution View → 107

Which of the following rays are not electromagnetic waves?

NEET 2003 Solution View → 108

Characteristic X-rays are produced due to

NEET 2003 Solution View → 109

Velocity of light is equal to

AIIMS 2002 Solution View → 110

Assertion : Quasar emits radiowaves more than radio galaxy. Reason : Quasar has very small size.

AIIMS 2002 Solution View → 111

What is the cause of the 'Greenhouse effect'?

NEET 2002 Solution View → 112

Which is having a minimum wavelength?

NEET 2002 Solution View → 113

The velocity of the electromagnetic wave is parallel to:

NEET 2002 Solution View → 114

X-ray beams are affected by

AIIMS 2001 Solution View → 115

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

NEET Solution View → 116

Statement I If the accelerating potential in an X-ray tube is increased, the wavelengths of the characteristic X -rays do not change. Statement II When an electron beam strikes the

NEET Solution View → 117

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

NEET Solution View → 118

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

NEET Solution View → 119

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

NEET Solution View → 120

Which of the following is/are the property/properties of a monochromatic electromagnetic wave propagating in the free space? 1. Electric and magnetic fields will have a phase diffe

NEET Solution View →
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