Electromagnetic Waves

Subject matter experts of JagranJosh have developed chapter wise practice questions of Class 12th as per the relevancy of the chapter in the CBSE board exam. This practice set contains 10 questions with detailed explanations on “Chapter: Electromagnetic Waves” of Physics.

  • Q1. If E  and  B   represent electric and magnetic field vector of the electromagnetic wave, the direction  of propagation of electromagnetic wave is along.

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  • Q2.The electric and magnetic field of an electromagnetic wave are:

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  • Q3. The velocity of electromagnetic radiation in a medium of permittivity  0 and permeability  μ 0   is  given by

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  • Q4. If μ 0  be the permeability and  k 0 , the dielectric constant of a medium, its refractive index is given by

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  • Q5.A plane electromagnetic wave is incident on a material surface. The wave delivers momentum p and energy E. Then

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  • Q6.Find the order of frequency of electromagnetic wave which is best suited to observe a particle having radius 3× 10 4 cm?

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  • Q7.When a plane electromagnetic wave travels in vacuum, the average electric energy density is given by ( here  E 0  is the amplitude of the electric field of the wave )

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