GATE EC 2022: Electromagnetics Quiz 6

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Question 1

Skin depth depends on

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

Question 2

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 3

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 4

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 5

The EM wave which does not propagate through a rectangular waveguide with a = 30 mm and b = 15 mm is:

• AEM wave of frequency 4.5 GHz
• BEM wave of frequency 5.5 GHz
• CEM wave of frequency 50 GHz
• DEM wave of frequency 300 GHz

Question 6

The magnetic field of an EM wave travelling in free space is given by

The wave is

• ACircularly polarized
• BElliptically polarized
• Clinearly polarized
• DNone of these

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