# The input impedance Zin looking line 1 is

1.  0

2.  25Ω

3.  ∞

4.  50Ω

4

25Ω

Explanation :
No Explanation available for this question

# The Zin looking line 2 is

1.  25Ω

2.  0

3.  ∞

4.  100Ω

4

Explanation :
No Explanation available for this question

# The The Zin looking line 3 is

1.  100Ω

2.  50Ω

3.  25Ω

4.  ∞

4

100Ω

Explanation :
No Explanation available for this question

# The 300 Ω lossless line shown in figure is matched to the left of the stub. The value of ZL is

1.  1-j1.37

2.  1+j1.37

3.  300+j413

4.  300-j413

4

300+j413

Explanation :
No Explanation available for this question

# The length d is

1.  0.111λ

2.  0.06 λ

3.  0.13 λ

4.  0.02 λ

4

0.13 λ

Explanation :
No Explanation available for this question

# The length l is

1.  0.67 λ

2.  0.13 λ

3.  0.53 λ

4.  0.86 λ

4

0.13 λ

Explanation :
No Explanation available for this question

# A loss-less, air dielectric cylindrical wave duide of inside diameter 3cm is operated at 14GHz For the TM11 mode propagating in +z direction, the wave impedance will be (for TM11 mode, Kc a =3.832)

1.   120 πΩ

2.  185 πΩ

3.  240 πΩ

4.  95.25 πΩ

4

185 πΩ

Explanation :
No Explanation available for this question

# For a wave propagating an air filled rectangular wave guide,

1.  Guided wavelength is never less than the free space wavelength.

2.  Wave impedence.is never less than the free

3.  Phase velocities is never less than the free space velocity

4.  TEm mode is possible if the dimensions of the wave guide are properly chosen.

4

Phase velocities is never less than the free space velocity

Explanation :
No Explanation available for this question

# Assuming perfect conductor of a transmission line, pure TEM propagation is NOT possible in

1.  coaxial cable

2.  air filled cylindrical wave guide

3.  parallel thin wire line in air

4.  semi infinite parallel plate wave guide

4

coaxial cable

Explanation :
No Explanation available for this question

# The dominant mode . a rectangular Wave guide is TE0, because this mode has

1.  no attenuation

2.  no cut-off

3.  no magnetic field component

4.  the highest cut off wavelength

4