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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
Related Questions: - A wire carrying current I has the shape as shown in adjoining figure. Linear parts
- Two poles of same strength attract each other with a force of magnitude F
- Three blocks A,B and C of masses 4 kg, 2 kg and 1 kg respectively are in contact
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Topics: Electromagnetic Waves
(28)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A wire carrying current I has the shape as shown in adjoining figure. Linear parts
- Two poles of same strength attract each other with a force of magnitude F
- Three blocks A,B and C of masses 4 kg, 2 kg and 1 kg respectively are in contact
- If Q, E and W denote respectively the heat added, change in internal energy
- The temperature coefficient of a resistance wire is 0.00125 per degree.
Topics: Electromagnetic Waves (28)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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