Question

The electric field of a uniform plane electromagnetic wve in free space, along the positive direction, is given by E = 10(ay + jaz)e^-j25x. The frequency and polarization of the wave, respectively are (a) 1.2 GHz, left circular (b) 4 GHz, left circular (c) 1.2 GHz, right circular (d) 4 GHz, right circular This question was posed to me in an interview for internship. My query is from Advanced and Tricky Questions in section Advanced and Tricky Questions 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

The correct choice is (a) 1.2 GHz, left circular The best explanation: The amplitudes of the components are the same. Hence it is circular polarization. The phase difference is +90 degree. Thus it is left hand circular polarisation. The frequency f = c/wavelength = 3 x 10^8 x 25/2 x 3.14 = 1.2 GHz.