Question

If the magnetic field in a plane electromagnetic wave is given by vector B = 3 x 10^-8 sin(1.6 x 10³x + 48 x 10¹⁰ t)j vector T, then what will be expression for electric field? 

Answer 1

Answer is 

vector ((E x B) = C) = - i

where vector B is along j

E/B = C

E = 3 x 10^{- 8} x 3 x 10⁸ = 9 V/m

Answer 2

Answer is (1) 

E₀/B₀ = C (speed of light in vacuum)

E₀ = B₀C = 3 × 10^–8 × 3 ×10⁸

So E = 9 sin(1.6 × 10³x + 48 × 10¹⁰t) kV /m