The magnetic field of a plane electromagnetic wave is given by $\overrightarrow{B} = 3 \times 10^{-8} \cos (1.6 \times 10^3 x + 48 \times 10^{10} t) \hat{j} \text{ T}$. The associated electric field is:

• A
  $3 \times 10^{-8} \cos (1.6 \times 10^3 x + 48 \times 10^{10} t) \hat{i} \text{ V/m}$
• B
  $3 \times 10^{-8} \sin (1.6 \times 10^3 x + 48 \times 10^{10} t) \hat{i} \text{ V/m}$
• C
  $9 \sin (1.6 \times 10^3 x - 48 \times 10^{10} t) \hat{k} \text{ V/m}$
• D
  $9 \cos (1.6 \times 10^3 x + 48 \times 10^{10} t) \hat{k} \text{ V/m}$