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The speed of electromagnetic waves in vaccum is equal to
Options
(a) μ₀ε₀
(b) √(μ₀ε₀)
(c) 1/√(μ₀ε₀)
(d) 1/(μ₀ε₀)
Correct Answer:
1/√(μ₀ε₀)
Explanation:
According to Maxwelll, it is found that the electromagnetic waves travel in free space (or vacuum) with a speed is given by
c = 1 / √(μ₀ε₀) = 3 × 10⁸ ms⁻¹
Where, μ₀ and ε₀ are absolute permeability and permittivity of the free space, respectively.
where, μ₀ = 4π × 10⁻⁷ Wb A⁻¹m⁻¹
ε₀ = 8.85 × 10⁻¹² C² N⁻¹m⁻²
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Topics: Electromagnetic Waves
(28)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A hollow sphere of radius 0.1m has a charge of 5×10⁻⁸C. The potential
- Four identical cells of emf Ԑ and internal resistance r are to be connected in series.
- Point masses m₁ and m₂ are placed at the opposite ends of a rigid rod of length L,
- A radio isotope X with a half life 1.4 x 10⁹ years decays to Y which is stable
- If sink is at a temperature of -39⁰C and source at 0⁰C, then efficiency will be
Topics: Electromagnetic Waves (28)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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