GATE EC 2022: Electromagnetics Quiz 7

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Question 1

A uniform plane wave traveling in air is incident on the plane boundary between air and another dielectric medium with . The reflection coefficient for the normal incidence, is

• Azero
• B
• C
• D

Question 2

A lossy material has .The phase constant is 10 rad/m at 5Mhz
The loss tangent is

• A2913
• B1823
• C2468
• D1374

Question 3

A coaxial cable with an inner diameter of 1 mm and outer diameter of 2.4 mm is field with a dielectric of relative permittivity 10.89. Given , , the characteristic impedance of the cable is

• A330 Ω
• B100 Ω
• C143.2 Ω
• D15.89 Ω

Question 4

A 150 MHz uniform plane wave is normally incident from air onto a material. Measurements yield a SWR of 3 and the appearance of an electric field minimum at 0.3 in front of the interface. The impedance of material is

• A502 – j641
• B641 – j502
• C641 + j502
• D502 + j641

Question 5

A uniform plane wave in air is normally incident onto a lossless dielectric plate of thickness , and of intrinsic impedance . The SWR in front of the

• A1.12
• B1.34
• C1.70
• D1.93

Question 6

For a uniform plane wave of frequency 10⁶ Hz propagating in a good conductor, the fields undergoes a change in phase of 2radians over a distance of 1m.The field is attenuated by a factor of 1/e at a distance of :-

• A
• B
• C
• D2

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