engineering recuitment GATE ECE 2023-24 Test Series Electromagnetic Theory Electromagnetic Wave Propagation
An electromagnetic wave of 50 MHz is incident on a conductive medium (σ ≫ 1) such that its skin depth is 0.32 × 10-8 m.
(Permeability of the medium = 6.28 × 10-7)
Which of the following conclusion is/are correct:
1
The conductivity of the medium will be 1.01 × 107 S/m
2
The conductivity of the medium will be 0.99 × 1015 S/m
3
If an electromagnetic wave of 8 GHz frequency travels a distance of 0.275 mm in the dielectric medium, then it’s field intensity will be reduced by 40 dB
4
None of the above conclusion is correct.