Question

A plane electromagnetic wave of frequency 25 GHz is propagating in vacuum along the z-direction. At a particular point in space and time, the magnetic field is given by vector B = 5 x 10^-8 jT. The corresponding electric field vector E is (speed of light c = 3 × 10⁸ ms^–1)

(1) 1.66 × 10^–16 iV/m

(2) 15 iV/m

(3) -1.66 x 10^-16 iV/m 

(4) -15 iV/m

Answer 1

Answer is (2) 15i V/m

E/B = c

E = B × c

= 15 N/c

Answer 2

Answer is (2) 15 iV/m

E = vector (B x V)

= (5 x 10^-8 j) x (3 x 10⁸ k)

= 15 iV/m