GATE Papers >> ECE >> 2011 >> Question No 14

Question No. 14 ECE | GATE 2011

Consider the following statements regarding the complex Poynting vector P for the power radiated by a point source in an infinite homogeneous and lossless medium. ReP denotes the real part of P, S denotes a spherical surface whose centre is at the point source, and n^ denotes the unit surface normal on S. Which of the following statements is TRUE?

(A)  Re(P) remains constant at any radial distance from the source
(B)  Re(P) increases with increasing radial distance from the source

(C)

(D)

 


Answer : (C) remains constant at any radial distance from the source


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