GATE EC 2020: Electromagnetic Theory Quiz 6

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Question 1

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

• A2913
• B1823
• C2468
• D1374

Question 2

Skin depth depends on

• Aconductivity
• Bpermeability
• Cfrequency of incident radiation
• Dall of the above

Question 3

An electromagnetic wave is travelling at an angle with respect to the Z-axis within a medium with dielectric permittivity and magnetic permeability . The magnetic field is given as =Re


The wavelength (in meters) and (in degrees) are respectively given by

• A
• B
• C
• D

Question 4

There is a 20% reduction in amplitude of a wave travelling through a lossy non-magnetic medium, per meter. The wave is operated at 20 MHz and the electric field leads the magnetic field by 25 degrees. What is the value of β?

• A0.24
• B1.479
• C0.958
• D0.479

Question 5

A dipole having is located at the origin in free space and aligned so that its moment is in the u_zdirection. The E at point (r =1, 45⁰ , ) is

• A158.11 V/m
• B194.21 V/m
• C146.21 V/m
• D167.37 V/m

Question 6

A wave propagating in a lossless dielectric has the components

v/m

H = 1.1A/m

If the wave is travelling at (where C=3) then

• A3.5, 2.6
• B2.42, 1.65
• C1.25, 2.6
• D1.65, 2.42

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