# The lowest frequency, at which a uniform plane wave incident from region 1 onto the boundary at z=0 will have no reflection, is

1.  2.96 GHz

2.  4.38 GHz

3.  1.18 GHz

4.  590 MHz

4

1.18 GHz

Explanation :
No Explanation available for this question

# If H=0.2 cos (ωt-βx)az A/M is magnetic field of a wave. free space, then average Power Passing through a circle of radius 5 cm then x=1 plane will be approximately

1.  30 mW

2.  60mW

3.  120mW

4.  100mW

4

60mW

Explanation :
No Explanation available for this question

# Polystyrene has a relative permittivity of 2.7. If wave is incident at an angle θ1 of 300 from air onto polysterene, then angle of transmission will be nearly

1.  0.20

2.  20

3.  180

4.  480

4

180

Explanation :
No Explanation available for this question

# Two linearly polaris. plane waves A and B travelling in free space. the +ve X-direction meet at a point. Wave A. polarised in the Y direction and the wave B . polarised in the. direction. If the-two waves are of equal amplitude and are in phase quadrature, the resultant wave will be

1.  circularly polarised

2.  elliptically polarised

3.  linearly polarised

4.  vertically polarised

4

circularly polarised

Explanation :
No Explanation available for this question

# A very lossy, π/4 long, 50Ω transmission line is open circuited at the load end. The input impedence measured at the other end of the line is approximately

1.  0

2.  50Ω

3.  ∞

4.  none of these

4

0

Explanation :
No Explanation available for this question

# For a lossy transmission line short-circuited at the receiving end, the input impedance is given by (Z0 is the characteristic impedance, γ is the propagation constant and 1 is the length of the line)

1.  Z0 coth γ l

2.  Z0 cot γ l

3.  Z0 tanh γ l

4.  Z0 tan γ l

4

Z0 tanh γ l

Explanation :
No Explanation available for this question

# A transmission line whose characters is a resistance

1.  must be a lossless

2.  must be a distortionless line

3.  may not be a lossless line.

4.  may not be a distortionless line

4

may not be a lossless line.

Explanation :
No Explanation available for this question

# A lossless transmission line having 50 Ω characteristic impedance and length λ/4 is short circuited at one end and connected an ideal voltage source of IV at the other end. The current drawn from the voltage source is

1.  0

2.  0.02A

3.  ∞

4.  none of these

4

0

Explanation :
No Explanation available for this question

# A (75-j50) Ω load is connected a coaxial transmission line of Z0=75Ω, at.10GHz.The best method of matching consists in connecting

1.  a short-circuited stub at the load

2.  an inductance at the load

3.  a capacitance at some specific distance from the load

4.  a short-circuited sttub at some specific distance front the load

4

Explanation :
No Explanation available for this question

# A transmission line 'whose characteristic impedance is a pure resistance

1.  must be a lossless line

2.  must be a distrationless line

3.  may not fine

4.  may not be disertionless line

4