defence exam Coast Guard Navik GD (General Duty) 02/2025 Mock Test Series General Knowledge Ecology and Environment
Which of the following statements is true?
1
Electromagnetic waves or EM waves are waves that are created as a result of vibrations between an electric field and a magnetic field.
2
EM waves are composed of oscillating magnetic and electric fields.
3
Electromagnetic waves are formed when an electric field comes in contact with a magnetic field.
4
All of the above