A transmission line is distortionless if

1.   RL=1/GC  

2.  RL=GC

3.  LG=RC

4.  RG=LC

View Answer  
4
Correct Answer :

LG=RC


Explanation :
No Explanation available for this question

If the scattering matrix [S] of a two port network is [S]= Then the network is

1.  Lossless and reciprocal

2.  Lossless but not reciprocal

3.  Not lossless but reciprocald.

4.  Neither lossless nor reciprocal

View Answer  
4
Correct Answer :

Lossless and reciprocal




Explanation :
No Explanation available for this question

A transmission line has a characteristic impedance of 50Ω and a resistance of 0.1 Ω/m. If thew line is distortionless the attenuation constant (in Np/m) is

1.  500

2.  5

3.   0.014

4.   0.002

View Answer  
4
Correct Answer :

0.002


Explanation :
No Explanation available for this question

A transmission line of characteristic impedance 50 Ω is terminated by a 50 Ω load. When excited y a sinusoidal voltage source at 10 GHz, the phase difference between two points spaced 2 mm apart on the line is found to be π/4 radians. The phase velocity of the wave along the line is

1.  0.8 x 108 m/s

2.  1.2 x 108 m/s

3.  1.6 x 108 m/s

4.  3 x 108 m/s

View Answer  
4
Correct Answer :

1.6 x 108 m/s


Explanation :
No Explanation available for this question

A coaxial cable with an inner diameter of 1 mm and outer diameter of 2.4 mm is filled with a dielectric of relative permittivity 10.89. Given μ0=4π X 10-7 H/m, ε0=10-9/36π F/m, the characteristic impedance of the cable is

1.   330 Ω

2.  100 Ω

3.  143.3Ω

4.  15.9Ω

View Answer  
4
Correct Answer :

143.3Ω


Explanation :
No Explanation available for this question

The return loss a device is found to be 20 dB. The voltage standing wave ratio (VSWR) and magnitude of reflection coefficient are respectively

1.   1.22 and 0.1

2.  0.81 and 0.1

3.  -1.22 and 0.1

4.  2.44 and 0.2

View Answer  
4
Correct Answer :

1.22 and 0.1




Explanation :
No Explanation available for this question

The output impedance of a short-circuited lossless transmission line quarter wave ling is

1.   Purely resistive

2.  Purely resistive

3.  Infinity

4.  Dependent on the characteristic impedance of the line

View Answer  
4
Correct Answer :

Infinity


Explanation :
No Explanation available for this question

In the circuit shown, all the transmission line sections are lossless. The voltage Standing Wave Ratio (VSWR) on the 60 Ω is

1.   1.00

2.  1.64

3.  2.50

4.  3.00

View Answer  
4
Correct Answer :

1.64


Explanation :
No Explanation available for this question

A transmission line of characteristic impedance 50Ω is terminated in a load impedance Z1. The VSER of the line is measured an 5 and the first of the voltage maxima in the line is observed at a distance of λ/4 frpm the load. The value of ZL is

1.   10 Ω

2.  250 Ω

3.  (19.23+j 46.15)Ω

4.  (19.23-j 46.15)Ω

View Answer  
4
Correct Answer :

10 Ω



Explanation :
No Explanation available for this question

A transmission the with a characteristic impedance of 100Ω is used to match a 50Ω section to a 200 Ω section. If the matching is to be done both at 429 MHz and 1 GHz, the length of the transmission line can be approximately

1.  82.5 cm

2.  1.05 m

3.  1.58 m

4.  1.75 m

View Answer  
4
Correct Answer :

1.58 m


Explanation :
No Explanation available for this question
Previous Next

Interview Questions

MongoDB
Java Script
Node JS
PHP
JQuery
Python