1
GATE ECE 2002
MCQ (Single Correct Answer)
+1
-0.3
In an impedance Smith chart, a clockwise movement along a constant resistance circle gives rise to
A
a decrease in the value of reactance
B
an increase in the value of reactance
C
no change in the reactance value
D
no change in the impedance value
2
GATE ECE 2001
MCQ (Single Correct Answer)
+1
-0.3
A transmission line is distortionless if
A
$$R\,L = {1 \over {G\,C}}$$
B
$$R\,L = G\,C$$
C
$$L\,G = R\,C$$
D
$$R\,G = L\,C$$
3
GATE ECE 2000
MCQ (Single Correct Answer)
+1
-0.3
The magnitudes of the open-circuit and short-circuit input impedances of a transmission line are 100$$\Omega \,$$ and 25$$\Omega \,$$ respectively. The characteristic impedance of the line is
A
25 $$\Omega \,$$
B
50 $$\Omega \,$$
C
75 $$\Omega \,$$
D
100 $$\Omega \,$$
4
GATE ECE 1999
MCQ (Single Correct Answer)
+1
-0.3
Assuming perfect conductors of a transmission line, pure TEM propagation is NOT possible in
A
coaxial cable
B
air-filled cylindrical waveguide
C
parallel twin-wire line in air
D
semi-infinite parallel plate waveguide
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