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The ratio of amplitude of magnetic field to the amplitude of electric field for an electromagnetic wave propagating in vacuum is equal to:
Options
(a) The speed of light in vacuum
(b) reciprocal of speed of light in vacuum
(c) the ratio of magnetic permeability to the electric susceptibility of vacuum
(d) unity
Correct Answer:
reciprocal of speed of light in vacuum
Explanation:
The average energy stored in the electric field Uᴇ = (1/2) ε₀E²
The average energy stroed in the magnetic field Uв = (1/2) . (B² /μ₀),
According to conservation of energy Ue = Ub
ε₀μ₀ = B² / E²
B / E = √(ε₀μ₀) = 1/C
Related Questions: - In Young’s double slit experiment, the wavelength of the light used is doubled
- A single slit Fraunhogger diffraction pattern is formed with white light.
- Two point charges +2 coulomb and +10 coulomb repel each other with a force of 12 N.
- The threshold frequency for a photosensitive metal is 3.3 x 10¹⁴ Hz.
- A planet in a distinct solar system is 10 times more massive than the earth
Topics: Electromagnetic Waves
(28)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- In Young’s double slit experiment, the wavelength of the light used is doubled
- A single slit Fraunhogger diffraction pattern is formed with white light.
- Two point charges +2 coulomb and +10 coulomb repel each other with a force of 12 N.
- The threshold frequency for a photosensitive metal is 3.3 x 10¹⁴ Hz.
- A planet in a distinct solar system is 10 times more massive than the earth
Topics: Electromagnetic Waves (28)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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