MCQ Practice Question Electromagnetic TheoryEM Wave Fundamentals The intrinsic impedance of free space is approximately? A50 ohm B75 ohm C120 pi ohm D600 ohm Show AnswerHide AnswerReport an error Correct Answer: C. 120 pi ohm Explanation: η0=sqrt(mu0/epsilon0)=120π ohm, approximately 377 ohm.Reference: Standard electromagnetic theory: em wave fundamentals