ECE - Questions and solutions set-10

Electronics and communication Engineering Questions and solutions set-10
Question:-
Option (A)
8 W
Option (B)
71.4 W
Option (C)
35 W
Option (D)
None of these
Correct Option:
C
Question Solution:
Power flow = ≈ 35 W
Question:-
Option (A)
0.7 A, 2.3 V
Option (B)
0.2 A, 1.121 V
Option (C)
0.2 A, 0.75 V
Option (D)
0.75 A, 0.2 V
Correct Option:
C
Question Solution:
PutVD = 0
Isc =
=> Isc = 0.2 A
PutID = 0
0 =
=> =
=> =
= 29.017
therefore, VD = 0.0259 x 29.017
=> VOC = 0.75 Volt
Question:-
Option (A)
Option (B)
Option (C)
Option (D)
None of these
Correct Option:
A
Question Solution:
Examination of the phase, ωt - βz, shows that the direction of propagation is +z. Since must also be in the +z direction. So,
^ay x ^H = ^az
therefore, must have a direction of
also
= 120 π
=> H =
Hence
=