ETC EngineeringMCQs
Home › Electromagnetic Theory › The approximate speed of an electromagnetic wave in free space is?
MCQ Practice Question
Electromagnetic TheoryEM Wave Fundamentals

The approximate speed of an electromagnetic wave in free space is?

  • A3×10^6 m/s
  • B3×10^8 m/s
  • C3×10^10 m/s
  • D9×10^16 m/s
Report an error
Correct Answer: B. 3×10^8 m/s
Explanation: Electromagnetic waves propagate in vacuum at approximately 3×10^8 m/s.
Reference: Standard electromagnetic theory: em wave fundamentals
Continue practicing: Electromagnetic Theory MCQs or browse all MCQs.