# Network EMT

Network EMT
Question:-
Option (A)
TE12
Option (B)
TE20
Option (C)
TE21
Option (D)
TE31
Correct Option:
C
Question Solution:
Comparing with standard equation
Ey =
We have
m = 2  and  n = 1
Hence mode of operation is TE21.
Question:-
Option (A)
100 μW
Option (B)
10 nW
Option (C)
1 μW
Option (D)
Data is insufficient
Correct Option:
A
Question Solution:
= Power density at the receiving location x effective area of the receiving antenna
= 2 x 10-3 x 500 x 10-4
= 10-4W = 100 μW
Question:-
Option (A)
All r - and x - circles pass through point .
Option (B)
Any impedance repeats itself every λ/4 on the Smith chart.
Option (C)
An s = 2 circle is the same as circle on the Smith chart.
Option (D)
None of these
Correct Option:
A
Question:-
Option (A)
TE110
Option (B)
TE011
Option (C)
TM110
Option (D)
TM111
Correct Option:
A
Question Solution:
In a rectangular cavity for propagation to z in TE mode,
Hzs =
Where
m = 0, 1, 2, 3, ...
n = 0, 1, 2, 3, ...
p = 1, 2, 3, ...
Similarly for propagation to z in TM mode
Ezs =
Where
m = 1, 2, 3, ...
n = 1, 2, 3, ...
p = 0, 1, 2, 3, ...
Hence in TE mode p can not have a value equal to zero ; therefore TE110 mode does not exist.