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JEE Main 202227 JulyEvening Shift
Exam
JEE Main
Year
2022
Date
27 July
Shift
Evening Shift
Subject
Physics
Chapter
Electromagnetic Waves

JEE Main 2022 · 27 July · Evening Shift · Physics · Electromagnetic Waves

Identify the correct statements from the following descriptions of...

Identify the correct statements from the following descriptions of various properties of electromagnetic waves.

A. In a plane electromagnetic wave electric field and magnetic field must be perpendicular to each other and direction of propagation of wave should be along electric field or magnetic field.

B. The energy in electromagnetic wave is divided equally between electric and magnetic fields.

C. Both electric field and magnetic field are parallel to each other and perpendicular to the direction of propagation of wave.

D. The electric field, magnetic field and direction of propagation of wave must be perpendicular to each other.

E. The ratio of amplitude of magnetic field to the amplitude of electric field is equal to speed of light.

Choose the most appropriate answer from the options given below:

Options

  1. AD only
  2. BB and D only
  3. CB, C and E only
  4. DA, B and E only

Correct answer

B. B and D only

Step-by-step solution

In an electromagnetic wave electric field magnetic field and the direction of propagation of the wave are mutually perpendicular. Therefore, statement D is correct and statement A and C are incorrect.

The energy is equally divided between electric and magnetic field. Therefore, statement B is correct.

Speed of light c=E0B0c = \dfrac{{E}_{0}}{{B}_{0}}. Therefore, statement E is incorrect.

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