PYQ NEET- Electromagnetic Waves L-3

Question: The ratio of the magnitude of the magnetic field and electric field intensity of a plane electromagnetic wave in free space of permeability $\mu_0$ and permittivity $\varepsilon_0$ is (Given that $\mathrm{c}$ - velocity) of light in free space : (NEET-2022)#

A) $\frac{\sqrt{\mu_0 \varepsilon_0}}{c}$

$C$

C) $\frac{1}{c}$

D) $\frac{c}{\sqrt{\mu_0 \varepsilon_0}}$

Answer: $\frac{1}{c}$#

Explanation#

We know, $\frac{E_0}{B_0} \text { (in vacuum) }=\text { c }$

$\therefore \frac{B_0}{E_0}=\frac{1}{c}$

or, $\frac{B_0}{E_0}=\sqrt{\mu_0 \varepsilon_0}$