Question

The power of a wave having a magnetic field intensity of 2.5 units is (a) 1.17 kilo watt (b) 1.17 mega watt (c) 1.17 watt (d) 11.7 watt I had been asked this question during an interview. My question comes from Transients in division Waveguides of Electromagnetic Theory Select the correct answer from above options Electromagnetic Theory questions and answers, Electromagnetic Theory questions pdf, Electromagnetic Theory question bank, Electromagnetic Theory questions and answers pdf, mcq on Electromagnetic Theory pdf,electromagnetic theory book pdf,electromagnetic theory pdf notes,electromagnetic theory lecture notes,electromagnetic theory of light,maxwell electromagnetic theory,electromagnetic theory proposed by,electromagnetic theory engineering physics,electromagnetic theory nptel

Answer 1

Right answer is (a) 1.17 kilo watt The explanation: The power of a wave is given by P = 0.5 η H^2, where η is the intrinsic impedance and H is the magnetic field intensity. On substituting for η = 377 and H = 2.5, we get P = 0.5 x 377 x 2.5^2 = 1.17 kilo watts.