NEETPhysicsElectromagnetic WavesMCQ+4 / −1
The ratio of contributions made by the electric field and magnetic field components to the intensity of and electromagnetic wave is : (c = speed of electromagnetic waves)
- A1 : 1
- B1 : c
- C1 : c2
- Dc : 1
View written solutionFree
Correct answer: A
The total energy of an electromagnetic wave is equally shared by E and B. So the ratio is 1 : 1.
More from Electromagnetic Waves
- Which colour of the light has the longest wavelength?2019 · MCQ
- An EM wave is propagating in a medium with a velocity . 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…2018 · MCQ
- In an electromagnetic wave in free space that root mean square value of the electric field is Erms = 6 V m1. The peak value of the magnetic field is2017 · MCQ
- Out of the following options which one can be used to produce a propagating electromagnetic wave ?2016 · MCQ
- The energy of the em waves is of the order of 15 keV. To which part of the spectrum does it belong ?2015 · MCQ
- A radiation of energy 'E' falls normally on a perfectly reflecting surface. The momentum transferred to the surface is (C = Velocity of light)2015 · MCQ
- Light with an energy flux of 25 104 W m2 falls on a perfectly reflecting surface at normal incidence. If the surface area is 15 cm2, the average force exerted on the surface is2014 · MCQ
- An electromagnetic wave of frequency MHz passes from vaccum into a dielectric medium with relative permittivity = 4.0. Then2013 · MCQ