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Exam Questions Papers - Engineering

Q1:

The electric field of uniform plane wave is given by E = 20 sin (2 p x 108t- pz) x + 20 cos (2 p x 108t - pz) y. The polarization of wave is

A Elliptical, left handed

B Circular, left handed

C Elliptical, right handed

D Circular, right handed

ANS:B - Circular, left handed

The given two components are equal in amplitude, perpendicular and out of phase by 90°. ∴ The wave is circularly polarized. Now we consider z = 0 and put t = 0 and ∴ At t = 0, E = 10ay At t ∴ Left circularly polarized.