Consider a transmission fine of characteristic impedance 50 ohm. Let it be terminated at one end by +j50 ohm. The VSWR produced by it in the transmission line will be

1.  +1

2.  0

3.  ∞

4.  +j

View Answer  
4
Correct Answer :

∞


Explanation :
No Explanation available for this question

The capacitance per unit length and the characteristic impedance of a loss less transmission line are C and Z0 respectively. The velocity of a traveling wave on the transmission line is

1.  Z0 C

2.  1/ Z0 C

3.  Z0/C

4.  C/Z0

View Answer  
4
Correct Answer :

1/ Z0 C


Explanation :
No Explanation available for this question

A line comprised of two copper wires of diameter 1.2 mm that have 3.2 mm center to center spacing. If wires are separated by a dielectric material with r=3.5, then value of characteristic impedance Z0 is

1.  96 Ω

2.  150 ΩΩ

3.  74 Ω

4.  105Ω

View Answer  
4
Correct Answer :

105Ω


Explanation :
No Explanation available for this question

A 50Ω characteristic impedance line is connected to a load which shows a reflection coefficient of 0.2568. If Vin=15V, then net power delivered . the load will-be

1.  0139W

2.  1.30 W

3.  0.278 W

4.  2.78W

View Answer  
4
Correct Answer :

1.30 W


Explanation :
No Explanation available for this question

The electric field at a point from a transmitter radiating a certain power is 2.5 mV/m. If transmitter power is doubled, then yield strength at that point will be doubt

1.  2.5 mV/m

2.  mV/m

3.  5 mV/m

4.  10 m V/m

View Answer  
4
Correct Answer :

2.5 mV/m


Explanation :
No Explanation available for this question

If VSWR is 3, then magnitude of the reflection coefficient will be

1.  1/4

2.  1/3

3.  1/2

4.  1

View Answer  
4
Correct Answer :

1/2


Explanation :
No Explanation available for this question

If VSWR is 3, then magnitude of the reflection coefficient will be

1.  1/4

2.  1/3

3.  1/2

4.  1

View Answer  
4
Correct Answer :

1/2


Explanation :
No Explanation available for this question

A quarter-wave transformer is used for matching a load of 225 ohms connected to transmission line of 256 ohms in order to reduce the SWR along the line to 1. The characteristic impedance (in ohms) of the transformer

1.  225

2.  256

3.  240

4.  273

View Answer  
4
Correct Answer :

240


Explanation :
No Explanation available for this question

Which of the following conditions will not guarantee a distortionless transmission line

1.  R=G=0

2.  RC= GL

3.  Very low frequency range (R >> ωL, G>> ωC)

4.   Very high frequency range R

View Answer  
4
Correct Answer :

Very low frequency range (R >> ωL, G>> ωC)


Explanation :
No Explanation available for this question

An 81Ω loss less planer line was designed but did not meet a requirement. To get the characteristic impedance of 75Ω, fraction of the width of the strip should be

1.  added by 4%

2.  removed by 4%

3.  added by 8%

4.  removed by 8%

View Answer  
4
Correct Answer :

added by 8\%


Explanation :
No Explanation available for this question
Previous Next

Interview Questions

MongoDB
Java Script
Node JS
PHP
JQuery
Python