JEE Main2012PhysicsElectromagnetic WavesActual
An electromagnetic wave with frequency and wavelength travels in the +y direction. Its magnetic field is along +x -axis. The vector equation for the associated electric field (of amplitude E₀ ) is
Options
- AE =-E₀ ( t+ 2 y ) x
- BE =E₀ ( t- 2 y ) x
- CE =E₀ ( t- 2 y ) z
- DE =-E₀ ( t+ 2 y ) z
Correct answer
C. E =E₀ ( t- 2 y ) z
Step-by-step solution
In an electromagnetic wave electric field and magnetic field are perpendicular to the direction of propagation of wave. The vector equation for the electric field is E =E₀ ( t- 2 y ) z