1
GATE ECE 1991
MCQ (Single Correct Answer)
+2
-0.6
The input impedance of a short-circuited lossless transmission line guarter wave long is
A
purely reactive
B
purely resistive
C
infinite
D
dependent on the characteristic impedance of the line
2
GATE ECE 1989
MCQ (Single Correct Answer)
+2
-0.6
A 50 ohm lossless transmission line has a pure reactance of (j100) ohms as its load. The VSWR in the line is :
A
1/2
B
2
C
4
D
$$\infty $$
3
GATE ECE 1988
MCQ (Single Correct Answer)
+2
-0.6
A two - wire transmission line of characteristic impedance $$Z_0$$ is connected to a load of impedance $${Z_L}({Z_L}\, \ne \,\,{Z_0})$$. Impedance matching cannot be achieved with
A
a quarter-wavelength transformer
B
a half-wavelength transformer
C
an open-circuited parallel stub
D
a short-circuited parallel stub
4
GATE ECE 1987
MCQ (Single Correct Answer)
+2
-0.6
A transmission line of pure resistive characteristic impedance is terminated with an unknown load. The measured value of VSWR on the line is equal to 2 and a voltage minimum point is found to be at the load. The load impedance is then
A
complex
B
Purely capacitive
C
Purely resistive
D
Purely inductive
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