v=kω=51.5×109=3×108 m/sB0=vF0=3×10860=20×10−8=2×10−7 T 
By=2×10−7cos(5x+1.5×109t)T
NEET UG 2025 — Physics Electromagnetism
The electric field in a plane electromagnetic wave is given by Ez=60cos(5x+1.5×109t)V/m. Then expression for the corresponding magnetic field is (here subscripts denote the direction of the field) :
Held on 30 Apr 2025 · Verified 9 Jul 2026.
By=2×10−7cos(5x+1.5×109t)T
Bx=2×10−7cos(5x+1.5×109t)T
Bz=60cos(5x+1.5×109t)T
By=60sin(5x+1.5×109t)T
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