1
COMEDK 2022
MCQ (Single Correct Answer)
+1
-0
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]
2
COMEDK 2021
MCQ (Single Correct Answer)
+1
-0
The correct arrangement in increasing order of wavelength of X-rays, UV rays, microwave is
3
COMEDK 2021
MCQ (Single Correct Answer)
+1
-0
Which of the following waves are used to treatment of muscles ache?
4
COMEDK 2020
MCQ (Single Correct Answer)
+1
-0
Which of the following has/have zero average value in a plane electromagnetic wave?
Questions Asked from Electromagnetic Waves (MCQ (Single Correct Answer))
Number in Brackets after Paper Indicates No. of Questions
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Physics
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Electromagnetism
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Modern Physics
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Physical Chemistry
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