The electric field in a plane electromagnetic wave is given by \(E_z = 60\cos(5x + 1.5\times10^9 t)\,V/m\). Then expression for the corresponding magnetic field is (here subscripts denote the direction of the field) :
Electromagnetic Waves
Every question from past board papers on Electromagnetic Waves, newest paper first. Open any question for its full worked answer.
NEET UG 2025 question paper (official, booklet 45)
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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 field arising due to displacement current is :
NEET UG 2024 question paper (official, booklet S6)
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The property which is not of an electromagnetic wave travelling in free space is that :
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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 UG 2023 question paper (official, booklet G6)
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In a plane electromagnetic wave travelling in free space, the electric field component oscillates sinusoidally at a frequency of \(2.0\times10^{10}\,\mathrm{Hz}\) and amplitude \(48\,\mathrm{V\,m^{-1}}\). Then the amplitude of oscillating magnetic field is : (Speed of light in free space \(= 3\times10^{8}\,\mathrm{m\,s^{-1}}\))
NEET UG 2022 question paper (official, booklet R6)
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Match List - I with List - II :
List - I (Electromagnetic waves): (a) AM radio waves (b) Microwaves (c) Infrared radiations (d) X-rays
List - II (Wavelength): (i) \(10^{-10}\) m (ii) \(10^{2}\) m (iii) \(10^{-2}\) m (iv) \(10^{-4}\) m
Choose the correct answer from the options given below :
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When light propagates through a material medium of relative permittivity \(\epsilon_r\) and relative permeability \(\mu_r\), the velocity of light, \(v\) is given by : (c - velocity of light in vacuum)
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The energy that will be ideally radiated by a 100 kW transmitter in 1 hour is :
NEET UG 2021 question paper (official, booklet M4)
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A capacitor of capacitance 'C', is connected across an ac source of voltage V, given by
\(V = V_0 \sin\omega t\)
The displacement current between the plates of the capacitor, would then be given by :
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For a plane electromagnetic wave propagating in x-direction, which one of the following combination gives the correct possible directions for electric field (E) and magnetic field (B) respectively ?
NEET UG 2020 question paper (official, booklet E1)
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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)
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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 surface during time span of 1 minute is :
NEET UG 2019 question paper (official, booklet P1)
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Which colour of the light has the longest wavelength ?
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A parallel plate capacitor of capacitance 20 \(\mu\)F is being charged by a voltage source whose potential is changing at the rate of 3 V/s. The conduction current through the connecting wires, and the displacement current through the plates of the capacitor, would be, respectively :
NEET UG 2018 question paper (official, booklet EE)
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An em wave is propagating in a medium with a velocity \(\vec V=V\hat i\). The instantaneous oscillating electric field of this em wave is along +y axis. Then the direction of oscillating magnetic field of the em wave will be along
NEET UG 2017 question paper (official, booklet B)
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In an electromagnetic wave in free space the root mean square value of the electric field is \(E_{rms}\) = 6 V/m. The peak value of the magnetic field is :
NEET UG 2016 Phase 1 question paper (official, booklet A)
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Out of the following options which one can be used to produce a propagating electromagnetic wave ?