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UGC-NET 2018: (Electromagnetic Theory) SpeedTest Quiz 15
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Question 1
The 
field (in A/m) of a plane wave propagating in free space is given by
H' = 5(3)1/2/ηocos(ωt-βz) + 5/ηo sin (ωt-βz)α
The time average power flow density in Watts is:
field (in A/m) of a plane wave propagating in free space is given by H' = 5(3)1/2/ηocos(ωt-βz) + 5/ηo sin (ωt-βz)α
The time average power flow density in Watts is:
Question 2
A uniform plane wave in air impinges at 45° angle on a lossless dielectric material with dielectric constant εr. The transmitted wave propagates in a 30° direction with respect to the normal. The value of εris
Question 3
The directivity of an antenna array can be increased by adding more antenna elements, as a larger number of elements
Question 4
The magnetic field intensity vector of a plane wave is given by 
where 
denotes the unit vector in y direction. The wave is propagating with a phase velocity
where denotes the unit vector in y direction. The wave is propagating with a phase velocity Question 5
The longitudinal component of the magnetic field inside an air-filled rectangular waveguide made of a perfect electric conductor is given by the following expression
(A/m)
The cross-sectional dimensions of the waveguide are given as a = 0.08 m and b = 0.033 m. The mode of propagation inside the waveguide is
(A/m)The cross-sectional dimensions of the waveguide are given as a = 0.08 m and b = 0.033 m. The mode of propagation inside the waveguide is
Question 6
In the design of a single mode step index optical fiber close to upper cut-off, the single mode operations is NOT preserved if
Question 7
Medium 1 has the electrical permittivity 
farad/m and occupies the region to the left of x = 0 plane. Medium 2 has the electrical permittivity 
farad/m and occupies the region to the right of x = 0 plane. If 
in medium 1 is 
volt/m, then E2 in medium 2 is
farad/m and occupies the region to the left of x = 0 plane. Medium 2 has the electrical permittivity farad/m and occupies the region to the right of x = 0 plane. If in medium 1 is volt/m, then E2 in medium 2 is Question 8
region 1, Z<0 and region 2, Z>0 are both perfect dielectrics. A uniform plane wave travelling in the 
direction has a frequency of 
.Its Wavelength in two regions are 
SWR in region 1 is
Question 9
What is the input impedance of a lossless transmission line operating at 1 GHz, with load and characteristic impedance of 10-j20 Ω and 50Ω respectively and the length of the transmission line being 0.25 λ.
Question 10
Two coaxial cables 1 and 2 are filled with different dielectric constants εr1and εr2respectively. The ratio of the wavelength in the two cable, 
is
is - 240 attempts
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