Electromagnetic theory miscellaneous
- The vector H in the far field of an antenna satisfies—
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H = ∇ × A
∴ ∇ × H = ∇ × (∇ × A) = 0
∇. H = ∇. (∇ × A) = 0Correct Option: C
H = ∇ × A
∴ ∇ × H = ∇ × (∇ × A) = 0
∇. H = ∇. (∇ × A) = 0
- The polarization of wave with electric field vector E = E0 ej zωt + βz) (ax + ay) is—
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Given E = E0 ej (ωt – βz) [ax + ay]
[As only space quadrature and no time quadrature]
Hence the polarization is linear.Correct Option: A
Given E = E0 ej (ωt – βz) [ax + ay]
[As only space quadrature and no time quadrature]
Hence the polarization is linear.
- The wavelength of a wave with propagation constant (0.1 π + j 0.2 π) m– 1 is—
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On comparing, given equation
γ = 0.1 π + j 0.2 π with
standard equation γ = α + jβ
β = 0.2 π
Now,λ = 2∏ = 2∏ = 10 m β .2∏ Correct Option: B
On comparing, given equation
γ = 0.1 π + j 0.2 π with
standard equation γ = α + jβ
β = 0.2 π
Now,λ = 2∏ = 2∏ = 10 m β .2∏
- All transmission line sections in figure shown below has a characteristic impedance, R0 + j0. The input impedance Zin equals—
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NA
Correct Option: B
NA
- Match the following:
1. Wave tilt
2. Faraday rotation
(A) Under-water propagation
(B) Ground wave propagation
(C) Space wave propagation
(D) Ionospheric propagation
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NA
Correct Option: D
NA