Consider the following statements regarding the complex Poynting vector P^{\to} for the power radiated by a point source in an infinite homogeneous and lossless medium. Re (P^{\to}) denotes the real part of P^{\to} , 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 ?

Correct Answer is : ∯sRe(P→)⋅n^ds→ decreases with increasing radial distance from the source

Re (P^{\to}) remains constant at any radian distance from the source

Re (P^{\to}) increases with increasing radial distance from the source

∯_{s}Re (P^{\to}) \cdot n^{\^} ds^{\to } remains constant at any radial distance from the source

∯_{s}Re (P^{\to}) \cdot n^{\^} ds^{\to } decreases with increasing radial distance from the source

GATE Electronics and Communications (EC) 2011 Solved Paper

Question : 11 of 65

Marks: +1, -0

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.

Re (P↖{→})

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 ?

$Re (P↖{→})$ remains constant at any radian distance from the source
$Re (P↖{→})$ increases with increasing radial distance from the source
$∯_{s}Re (P↖{→}) ⋅ n↖{\^} ds↖{→ }$ remains constant at any radial distance from the source
$∯_{s}Re (P↖{→}) ⋅ n↖{\^} ds↖{→ }$ decreases with increasing radial distance from the source

Go to Question:

Prev Question

Next Question