Comparing the given equation Ey=2.5CNcos[(2π×106mrad)t−(π×10−2secrad)x] With the standard equation Ey=E0cos(ωt−kx) we get ∴ω=2πf=2π×106f=106 Hz Moreover, we know that ⇒λ2π⇒λ=k=π×10−2 m−1=200 m Hence, the wave is moving along positive x-direction with frequency 106 Hz and wavelength 200 m.
The electric field part of an electromagnetic wave in a medium is represented by … The wave is
NEET UG 2009 — Physics Electromagnetism
2009mcqhard
The electric field part of an electromagnetic wave in a medium is represented by Ex=0Ey=2.5NC−1cos[(2π×106rads−1)t−(π×10−2radm−1)x]Ez=0 The wave is
Official previous-year question
Held on 30 Apr 2009 · Verified 9 Jul 2026.
Options
- A
moving along y direction with frequency 2π×106 Hz and wavelength 200 m.
- B
moving along x direction with frequency 106 Hz and wavelength 100 m
- C
moving along x direction with frequency 106 Hz and wavelength 200 m
- D
moving along −x direction with frequency 106 Hz and wavelength 200 m
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