JEE Main202528 Jan 2025Evening ShiftPhysicsElectromagnetic WavesActual
The magnetic field of an E.M. wave is given by B = ( 3 2 i + 1 2 j ) 30 [ ( t - z c ) ] (S.I. Units). The corresponding electric field in S.I. units is :
Options
- AE = ( 1 2 i - 3 2 j ) 30 c [ ( t - z c ) ]
- BE = ( 3 4 i + 1 4 j ) 30 c [ ( t - z c ) ]
- CE = ( 1 2 i + 3 2 j ) 30 c [ ( t + z c ) ]
- DE = ( 3 2 i - 1 2 j ) 30 c [ ( t + z c ) ]
Correct answer
A. E = ( 1 2 i - 3 2 j ) 30 c [ ( t - z c ) ]
Step-by-step solution
aligned & B = ( 3 2 i + 1 2 j ) 30 [ ( t - z c ) ] & E = B c and E = B ₀ c aligned Here E ( 3 2 (- j )+ 1 2 i ) aligned & E ₀=30 c & E = ( 1 2 i - 3 2 j ) 30 c [ ( t - z c ) ] aligned