An electromagnetic wave travels through a non-magnetic dielectric with relative…

PHYSICS · Single correct · CBSE · Physics · Electromagnetic Waves · Electromagnetic Waves

Problem

An electromagnetic wave travels through a non-magnetic dielectric with relative permittivity

\varepsilon_r = 4

and

\mu_r = 1

. Its magnetic field has a peak value

B_0 = 3\times10^{-7}\,\text{T}

and its wavelength in the medium is

0.60\,\text{m}

. The peak value of its electric field

E_0

is (a)

90\,\text{V\,m}^{-1}

(b)

45\,\text{V\,m}^{-1}

(c)

6.36\times10^{1}\,\text{V\,m}^{-1}

(d)

22.5\,\text{V\,m}^{-1}