1
GATE ECE 2011
MCQ (Single Correct Answer)
+2
-0.6
A transmission line of characteristic impedance 50 $$\Omega$$ is terminated in a load impedance $$Z_L$$. The VSWR of the line is measured as 5 and the first of the voltage naxima in the line is observed at a distance of $$\lambda /4$$ from the load. The value of $$Z_L$$ is
A
10 $$\Omega$$
B
250 $$\Omega$$
C
(19.23 + j 46.15) $$\Omega$$
D
(19.23 - j 46.15)$$\Omega$$
2
GATE ECE 2010
MCQ (Single Correct Answer)
+2
-0.6
In the circuit shown, all the transmission line sections are lossless. The Voltage Standing Wave Ration (VSWR) on the 60W line is
A
1.00
B
1.64
C
2.50
D
3.00
3
GATE ECE 2009
MCQ (Single Correct Answer)
+2
-0.6
A transmission line terminates in two branches, each of length $$\lambda /4$$, as shown.The branches are terminated by 50 $$\Omega$$ loads. The lines are lossless and have the characteristic impedances shown. Determine the impedance $${Z_i}$$ as seen by the source.
A
200 $$\Omega$$
B
100 $$\Omega$$
C
50 $$\Omega$$
D
25 $$\Omega$$
4
GATE ECE 2008
MCQ (Single Correct Answer)
+2
-0.6
One end of loss-less transmission line having the characteristic impedance of 75 $$\Omega$$ and length of 1 cm is short-ciruited. At 3 GHz, the input impedance at the other end of the transmission line is
A
0
B
Resistive
C
Capacitive
D
Inductive
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