# General Solutions-TE, TEM, TM Waves MCQ’s

This set of RF & Microwave Circuit Design Multiple Choice Questions & Answers (MCQs) focuses on “General Solutions-TE, TEM, TM Waves”.

1. If the wavelength of a signal is 10 mm, then the wavenumber of the material when a waveguide is filled with that material is:

a) 628

b) 345

c) 123

d) None of the mentioned

2. If a waveguide is filled with a lossy material then the expression for ∈ for that material is:

a) ∈=∈∈_{r}(1-jtan δ)

b) ∈= ∈ₒ∈_{r} (1/ j tanδ)

c) ∈=∈ₒ∈_{r}/(1+ j tan δ )

d) ∈=∈ₒ∈_{r}/(1-j tan δ )

3. Maxwell’s equation for electromagnetic waves in a waveguide is:

a) ∇×E = -jωµ(vector H)

b) ∇×E =-jωμ(vector E)

c) ∇×H=-jωμ(vector H)

d) ∇×H=jωμ(vector H)

4. If a waveguide is filled with a lossless material of relative permeability 2, then the wave impedance in the TEM mode is:

a) 188.5 Ω

b) 170 Ω

c) 123 Ω

d) 345 Ω

5. If p=0.3 and the wave number of air in TM mode is 16, then the intrinsic impedance of air in TM mode given wave number is 125 is:

a) 1 Ω

b) 0.9 Ω

c) 0.8 Ω

d) 2 Ω

6. The losses that occur in a transmission line is:

a) Conduction losses

b) Di-electric loss

c) Both of the mentioned

d) None of the mentioned

7. If the wave impedance of a medium is 200 Ω, then what is the relative permittivity of that medium?

a) 1.885

b) 2

c) 2.2

d) 2.5

8. If the intrinsic impedance of a medium is 0.8 Ω, with wave number 125 and β being 0.2, then the relative permeability of the medium is:

a) 1.326

b) 2.34

c) 4.5

d) 6.7

9. Which of the following is true regarding attenuation?

a) Conductor loss

b) Di-electric loss

c) Sum of both conductor loss and di electric loss

d) Attenuation is different from the losses

10. If the dielectric loss of a medium is 0.2 Np/m with a wave number of 12, then the value of loss tangent is:

a) 0.0334

b) 0.05

c) 0.08

d) 0.09

11. If the wave number of a medium is 20 and loss tangent is 0.4 , then the dielectric loss caused by the medium is:

a) 4

b) 2

c) 3

d) 6