Student Login

Home›Chapters›Electromagnetic Waves PYQs›Speed of EM Waves in a Medium›Question 1

JEE Main 2026 (23 Jan, Shift 2) · Speed of EM Waves in a Medium

Speed of EM Waves in a Medium question from JEE Main 2026 (23 Jan, Shift 2)

Q1JEE Main 2026 · 23 JAN · SHIFT 2Easy

Speed of EM Waves in a Medium

The ratio of speeds of electromagnetic waves in vacuum and a medium, having dielectric constant $k = 3$ and permeability of $\mu = 2\mu_0$ , is ( $\mu_0 =$ permeability of vacuum)

Show answer and solution

Answer: (c)

$\dfrac{c}{v} = \sqrt{\mu_r\varepsilon_r}$ with $\varepsilon_r = k = 3$ , $\mu_r = 2$ .
$\dfrac{c}{v} = \sqrt{6}$ .
So the answer is (c) $\sqrt{6} : 1$ .

Report a mistake

More questions on Speed of EM Waves in a Medium

An electromagnetic wave travelling in a lossless dielectric medium having a dielectric…NEET 2026 (Re-neet)
The electric field of an electromagnetic wave travelling through a medium is given by…JEE Main 2026 (28 Jan, Shift 1)
The electric field of a plane electromagnetic wave, travelling in an unknown nonmagnetic…JEE Main 2026 (22 Jan, Shift 1)
If an optical medium possesses a relative permeability of 10/π and relative permittivity…JEE Main 2025 (4 Apr, Shift 2)
Electromagnetic waves travel in a medium with speed of 1.5 × 10⁸ m s⁻¹. The relative…JEE Main 2024 (6 Apr, Shift 1)
If the ratio of relative permeability and relative permittivity of a uniform medium is 1…NEET 2024
Which of the following are true? A. Speed of light in vacuum is dependent on the…JEE Main 2023 (29 Jan, Shift 1)
In a medium the speed of light wave decreases to 0.2 times to its speed in free space…JEE Main 2023 (31 Jan, Shift 1)