NEET2025PhysicsElectromagnetic WavesActual
The electric field in a plane electromagnetic wave is given by E_z=60 (5 x +1.5 10^9 t ) V / m . Then expression for the corresponding magnetic field is (here subscripts denote the direction of the field) :
Options
- AB_y=2 10⁻⁷ (5 x+1.5 10^9 t ) T
- BB_x=2 10⁻⁷ (5 x+1.5 10^9 t ) T
- CB_z=60 (5 x+1.5 10^9 t ) T
- DB_y=60 (5 x+1.5 10^9 t ) T
Correct answer
A. B_y=2 10⁻⁷ (5 x+1.5 10^9 t ) T
Step-by-step solution
aligned & v = k = 1.5 10^9 5 =3 10^8 ~m / s & B ₀= F ₀ v = 60 3 10^8 =20 10⁻⁸=2 10⁻⁷ ~T aligned B _ y =2 10⁻⁷ (5 x +1.5 10^9 t ) T