The oscillating magnetic field in a plane electromagnetic wave is given by \( B_y = 5 \times 10^{-6} \sin(1000\pi(5x - 4 \times 10^{8} t))\; T \). The amplitude of electric field will be:
\( 15 \times 10^{2} \, \text{V m}^{-1} \)
\( 5 \times 10^{-6} \, \text{V m}^{-1} \)
\( 16 \times 10^{12} \, \text{V m}^{-1} \)
\( 4 \times 10^{2} \, \text{V m}^{-1} \)
