A loss-less line having characteristic impedance Z0 is terminated in a pure reactance of value-jZ0. The VSWR of the line will be

1.  10

2.  2

3.  1

4.  infinite

4

infinite

Explanation :
No Explanation available for this question

On a resistively terminated high frequency loss-less transmission line fed by a 500 MHz source , the VSWR is found to be equal to 2 and the first voltage minimum is measured at 30 cm from the load end. What is the value of the normaliser load resistance

1.  3

2.  2

3.  1/2

4.  1/4

4

1/2

Explanation :
No Explanation available for this question

For a quarter wavelength ideal transmission line of characteristic impedance 50 ohms and load impedance 100 ohms ,the input impedance be

1.  25Ω

2.  50 Ω

3.  100Ω

4.  150Ω

4

25Ω

Explanation :
No Explanation available for this question

A75 ohm transmission line. first short terminated and the minimum locations are noted. When short is replaced by a resistive load RL, the minima locations are not altered and the VSWR. measured to be 3. What is the value of RL

1.  20ohms

2.  50 ohms

3.  225 ohms

4.  250 ohms

4

225 ohms

Explanation :
No Explanation available for this question

A transmission line has primary constants R, L, G and C, and secondary constants Z0 and γ(= α+jβ). If the line is lossless, then

1.  R=0,G≠0 and α=0

2.  R=0,G≠0 and β=|γ|

3.  G =0 and α=β

4.  R=0,G=0,α=0 and β= lyl.

4

G =0 and α=β

Explanation :
No Explanation available for this question

A transmission line having 5.1 impedance terminated in a load of(40 +j30)Ω. The VSWR is

1.  j 0.33

2.  0.8+j0.6

3.  1

4.  2

4

2

Explanation :
No Explanation available for this question

A (75-j40)Ω load is connected to a coaxial line of; Z0=75Ω at 6 MHz. The load matching on the line can be accomplished by connecting

1.  a short-circuited stub at the load

2.  an induc.nce at the load

3.  a short-circuited stub at a specific distance from the load

4.  a capacitance at a specific distance from the load

4

a short-circuited stub at a specific distance from the load

Explanation :
No Explanation available for this question

The magnitude of the reflection coefficient of a transmission line in terms of the load and characteristic impedance is given by

1.  ρ=[ZL+Z0/Z0-ZL]

2.  ρ=[ZLZ0/Z0-ZL]

3.  ρ=[ZL-Z0/-ZL+ Z0]

4.  ρ=[ZL-Z0/-ZLZ0 ]

4

ρ=[ZL-Z0/-ZL+ Z0]

Explanation :
No Explanation available for this question

The reflection co-efficient on a line is 0.2-450. The SWR of this line is

1.  0.8

2.  1.1

3.  1.2

4.  1.5

4

1.5

Explanation :
No Explanation available for this question

A coaxial cable feeds a 75+j25Ω dipole antenna. The voltage reflection coefficient T and standing wave ratio s are respectively

1.  0.212 48.550, 1.538

2.  0.486 ? 68.40, 2.628

3.  0.486?41.450, 2.682

4.  0.212?68.40, 1.538

4