The oscillating magnetic field in a plane electromagnetic wave is given by By = 5 × 10–⁶ sin 1000 π (5x - 4 × 10⁸ t)T. The amplitude of electric field will be :
(A) 15 × 10² Vm–¹
(B) 5 × 10–⁶ Vm–¹
(C) 16 × 10¹² Vm–¹
(D) 4 × 10² Vm–¹