JEE Main20198 Apr 2019Morning ShiftPhysicsElectromagnetic WavesActual
A plane electromagnetic wave travels in free space along the x-direction. The electric field component of the wave at a particular point of space and time is E = 6 V m - 1 along y-direction. Its corresponding magnetic field component, B would be:
Options
- A2 × 10 - 8 T along z-direction
- B2 × 10 - 8 T along y-direction
- C6 × 10 - 8 T along z-direction
- D6 × 10 - 8 T along x-direction
Correct answer
A. 2 × 10 - 8 T along z-direction
Step-by-step solution
B = E C = 6 3 × 10 8 = 2 × 10 - 8 T E → × B → is along x -direction j ^ × a i ^ + b j ^ + c k ^ = i ^ c = 1 B → is along k ^ B = 2 × 10 - 8 T along z -direction