Physics Circle home Student Login

Home›Chapters›Electromagnetic Waves PYQs›Nature of EM Waves & Wave Equation›Question 20

JEE Main 2023 (29 Jan, Shift 2) · Nature of EM Waves & Wave Equation

Nature of EM Waves & Wave Equation question from JEE Main 2023 (29 Jan, Shift 2)

Q20JEE Main 2023 · 29 JAN · SHIFT 2Easy

Nature of EM Waves & Wave Equation

Given below are two statements:

Statement I: Electromagnetic waves are not deflected by electric and magnetic field. Statement II: The amplitude of electric field and the magnetic field in electromagnetic waves are related to each other as E0=μ0ε0 B0E_0 = \sqrt{\frac{\mu_0}{\varepsilon_0}}\,B_0.

In the light of the above statements, choose the correct answer from the options given below:

Show answer and solution

Answer: (b)

  1. Statement I: EM waves carry no charge, so electric and magnetic fields do not deflect them. True.
  2. Correct relation: E0=cB0=B0μ0ε0E_0 = cB_0 = \frac{B_0}{\sqrt{\mu_0\varepsilon_0}}.
  3. μ0/ε0≈377 Ω\sqrt{\mu_0/\varepsilon_0} \approx 377\ \Omega, not cc, so Statement II is false.
  4. So the answer is (b).
Report a mistake

More questions on Nature of EM Waves & Wave Equation