The electric field part of an electromagnetic wave in a medium is represented by

⇦

⇨

The electric field part of an electromagnetic wave in a medium is represented by Ex = 0
Ey = 2.5 (N / C) cos [(2π x 10⁶ rad/m) t – (π x 10⁻² rad/s) x ];
Ez = 0. The wave is:

Options

(a) moving along x direction with frequency 10⁶ Hz and wavelength 100 m.
(b) moving along x direction with frequency 10⁶ Hz and wave length 200 m.
(c) moving along -x direction with frequency 10⁶ Hz and wave length 200 m.
(d) moving along y direction with frequency 2π x 10⁶ Hz and wave length 200 m.

Correct Answer:

moving along x direction with frequency 10⁶ Hz and wave length 200 m.

Explanation:

Comparing with the equation of wave,
Ey = E₀ cos (ωt – kx)
ω = 2πf = 2π x 10⁶
Therefore, f = 10⁶ Hz
2π / λ = k = π x 10⁻² m⁻¹, λ = 200 m

Related Questions:

1. The work done in which of the following processes is zero?
2. Two wires of the same dimensions but resistivities p1 and p2 are connected in series
3. When a radioactive substance emits an ∝ particle, its position in the periodic table
4. If radius of the ₁₃Al²⁷ nucleus is taken to be Rᴀı, then the radius of ₅₃Te¹²⁵ nucleus
5. Two metal rods 1 and 2 of same lengths have same temperature difference

Topics: Electromagnetic Waves (28)
Subject: Physics (2479)

---

Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score

18000+ students are using NEETLab to improve their score. What about you?

Solve Previous Year MCQs, Mock Tests, Topicwise Practice Tests, Identify Weak Topics, Formula Flash cards and much more is available in NEETLab Android App to improve your NEET score.

---

Share this page with your friends