AIPMT MAINS2009Physics-Electromagnetic Waves
AIPMT MAINS 2009 Physics Wave Propagation MCQ Question
Type: MCQ-conceptual-Medium-Class 12
The electric field part of an electromagnetic wave in a medium is represented by Eₓ = 0; Eᵧ = 2.5 N/C cos [(2π × 10⁶ rad/m) x - (π × 10⁻² rad/s) t]. The wave is:
A
moving along x direction with frequency 10⁶ Hz and wavelength 100 m.
B
moving along x direction with frequency 10⁶ Hz and wavelength 200 m.
C
moving along -x direction with frequency 10⁶ Hz and wavelength 200 m.
D
moving along y direction with frequency 2π × 10⁶ Hz and wavelength 200 m.
Correct Answer
Option D
Detailed Explanation
The wave equation indicates a wave moving in the positive x-direction with a frequency of 10⁶ Hz and a wavelength of 200 m, as derived from the wave number and angular frequency.
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