EC > GATE 2014 SET-1 > Antenna Theory
In spherical coordinates, let âθ, âφ denote unit vectors along the θ, φ directions. E = (100/r) sin θ cos(ωt - βr) âθ V/m and H = (0.265/r) sin θ cos(ωt - βr) âφ A/m represent the electric and magnetic field components of the EM wave at large distances r from a dipole antenna, in free space. The average power (W) crossing the hemispherical shell located at r = 1km, 0 ≤ θ ≤ π/2 is ________
Correct : 55.5
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