Speed of electromagnetic wave in medium of dielectric constant 2.25 and relative permeability 4 is

Question

Speed of electromagnetic wave in medium of dielectric constant 2.25 and relative permeability 4 is (A) 108 m / s (B) 2.5 × 108 m / s (C) 2 × 108 m / s (D) 3 × 108 m / s

Tardigrade Admin · Accepted Answer

n =√εr μ r =√4 × 2.25=3, v =( C / n )=(3 × 108/3)=108

Q. Speed of electromagnetic wave in medium of dielectric constant $2.25$ and relative permeability $4$ is

$1 0^{8} m / s$

$2.5 \times 1 0^{8} m / s$

$2 \times 1 0^{8} m / s$

$3 \times 1 0^{8} m / s$

$n = ε_{r} μ_{r} = 4 \times 2.25 = 3,$
$v = \frac{C}{n} = \frac{3 \times 1 0 ^{8}}{3} = 1 0^{8}$

Q. Speed of electromagnetic wave in medium of dielectric constant 2.25 and relative permeability 4 is

108m/s

2.5×108m/s

2×108m/s

3×108m/s