The magnetic field of a plane electromagnetic wave is given by $B_x=2 \times 10^{-7} \sin \left(0.6 \times 10^3 y+2 \times 10^{11} t\right)T$. An expression for its electric field is:
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → $E_z=60 \sin \left(0.6 \times 10^3 y+2 \times 10^{11} t\right) V / M$
The magnetic field of a plane electromagnetic wave,
$B_x=2 \times 10^{-7} \sin \left(0.6 \times 10^3 y+2 \times 10^{11} t\right)T$
and,
$E_0=CB_0$
$⇒E_0=(3×10^8)×(2×10^{-7})$
$=60V/m$
$⇒E_z=60 \sin \left(0.6 \times 10^3 y+2 \times 10^{11} t\right) V / M$ [Direction by Right Hand Rule]