Electromagnetic Waves PYQs - Last 10 Years
COMEDK / Physics / Electromagnetism / 13 recent questions
PhysicsElectromagnetism2017-2026
Practice 13 COMEDK Physics questions from Electromagnetic Waves. Use the year-wise and type-wise breakdown to prioritize recent PYQs, then continue into the question list below.
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Physics / Electromagnetism
2020-2026
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2022-2026
13
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2017-2026
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Last 10 Years Electromagnetic Waves Questions
Showing 13 of 13 filtered questions.
1Electromagnetic Waves
Which of the following is incorrect for displacement current
A. Displacement current exists only when electric field changes with time
B. Displacement current obeys ohm's law
C. Displacement current produces magnetic field just like conduct...
A. Displacement current exists only when electric field changes with time
B. Displacement current obeys ohm's law
C. Displacement current produces magnetic field just like conduct...
MCQ+1 / -02026
2Electromagnetic Waves
The electric and magnetic fields associated with an electromagnetic wave propagating along +z axis, can be represented by
MCQ+1 / -02025
3Electromagnetic Waves
A plane electromagnetic wave with frequency 40 MHz travels in free space. At a particular point in space and time, the magnetic field is $2 \times 10^{-8} T$. What will be the electric field at this point?
MCQ+1 / -02025
4Electromagnetic Waves
Column - I lists the waves of the electromagnetic spectrum. Column - II gives approximate frequency range of these waves. Match Column - I and Column - II and choose the correct match from the given choices.
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MCQ+1 / -02024
5Electromagnetic Waves
An electromagnetic wave of frequency \(3 \mathrm{~MHz}\) passes from vacuum into a dielectric medium \((\mu_r=1)\) of relative permittivity 4.0. Then,
MCQ+1 / -02024
6Electromagnetic Waves
What feature of the infrared waves make it useful for the haze photography?
MCQ+1 / -02023
7Electromagnetic Waves
A plane electromagnetic wave of frequency \(20 \mathrm{~MHz}\) travels through a space along \(x\)-direction. If the electric field vector at a certain point in space is \(6 \mathrm{~Vm}^{-1}\), then what is the magnetic field vector at tha...
MCQ+1 / -02023
8Electromagnetic Waves
The ratio of amplitude of magnetic field to the amplitude of electric field of an electromagnetic wave propagating in vacuum is
MCQ+1 / -02023
9Electromagnetic Waves
A 30 mW laser beam has a cross-sectional area of 15 mm2. The magnitude of the maximum electric field in this electromagnetic wave is given by
[Permuittivity of space, \(\varepsilon_0=9\times10^{-12}\)
Speed of light, \(c=3\times10^8\) m/s]
[Permuittivity of space, \(\varepsilon_0=9\times10^{-12}\)
Speed of light, \(c=3\times10^8\) m/s]
MCQ+1 / -02022
10Electromagnetic Waves
Speed of electromagnetic wave in a medium having relative permittivity \(\varepsilon_r\) and relative permeability \(\mu_r\) is (speed of light in air, \(c=3\times10^8\) m/s)
MCQ+1 / -02022
11Electromagnetic Waves
Which of the following waves are used to treatment of muscles ache?
MCQ+1 / -02021
12Electromagnetic Waves
The correct arrangement in increasing order of wavelength of X-rays, UV rays, microwave is
MCQ+1 / -02021
13Electromagnetic Waves
Which of the following has/have zero average
value in a plane electromagnetic wave?
value in a plane electromagnetic wave?
MCQ+1 / -02020