Radiation And Microwave Techniques Set 1

Electrical Engineering

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This set of Radiation and Microwave Techniques Multiple Choice Questions & Answers (MCQs) focuses on Radiation And Microwave Techniques Set 1

Q1 | . Which of the following parameters is not a primary parameter?
  • resistance
  • attenuation constant
  • capacitance
  • conductance
Answer: attenuation constant
Q2 | ohm is
  • 50
  • 20
  • 1000
  • 125
Answer: 125
Q3 | For a matched line, the input impedance will be equal to
  • load impedance
  • characteristic impedance
  • output impedance
  • zero
Answer: characteristic impedance
Q4 | wave ratio of 2.5 is
  • 20
  • 125
  • 200
  • 75
Answer: 125
Q5 | The average power in an electromagnetic wave is given by
  • propagation constant
  • pointing vector
  • phase constant
  • attenuation constant
Answer: pointing vector
Q6 | The characteristic impedance of a transmission line is normally chosen to be
  • 50
  • 75
  • 50 or 75
  • 100
Answer: 50 or 75
Q7 | Identify the material which is not present in a transmission line setup.
  • waveguides
  • cavity resonator
  • antenna
  • oscillator
Answer: oscillator
Q8 | respectively. The standing wave ratio is
  • 2
  • 3
  • 1/2
  • 4
Answer: 3
Q9 | The range of the standing wave ratio is
  • 0 < s < 1
  • -1 < s < 1
  • 1 < s < ∞
  • 0 < s < ∞
Answer: 1 < s < ∞
Q10 | The best stub selection for the transmission line will be
  • series open
  • series short
  • shunt open
  • shunt short
Answer: shunt short
Q11 | The phenomenon employed in the waveguide operation is
  • reflection
  • refraction
  • total internal reflection
  • adsorption
Answer: total internal reflection
Q12 | The dominant mode in waveguide is the mode which has
  • highest frequency
  • highest wavelength
  • lowest phase constant
  • highest attenuation
Answer: highest wavelength
Q13 | The modes are calculated from which parameter?
  • frequency
  • wavelength
  • phase constant
  • v number
Answer: v number
Q14 | The circular waveguides use which function in the frequency calculation?
  • laplace function
  • schottky function
  • bessel function
  • transfer function
Answer: bessel function
Q15 | The scattering parameters are used to indicate the
  • permittivity and permeability
  • electric and magnetic field intensities
  • reflection and transmission coefficients
  • frequency and wavelength
Answer: reflection and transmission coefficients
Q16 | For the matched line, the parameters S12 and S21 are
  • 1
  • 0
  • -1
  • ∞
Answer: 0
Q17 | The waveguides are materials with characteristics of
  • low bulk resistivity
  • high bulk resistivity
  • high conductivity
  • low conductivity
Answer: low bulk resistivity
Q18 | range of
  • hz
  • khz
  • mhz
  • ghz
Answer: ghz
Q19 | In rectangular waveguides, the dimensions a and b represent the
  • broad wall dimensions
  • broad wall and side wall dimension respectively
  • side wall and broad wall dimension respectively
  • side wall dimensions
Answer: broad wall and side wall dimension respectively
Q20 | The cut off frequency for a waveguide to operate is
  • 3 mhz
  • 3 ghz
  • 6 mhz
  • 6 ghz
Answer: 6 ghz
Q21 | In transverse electric waves, which of the following is true?
  • e is parallel to h
  • e is parallel to wave direction
  • e is transverse to wave direction
  • h is transverse to wave direction
Answer: e is transverse to wave direction
Q22 | The dominant mode in rectangular waveguide is
  • te01
  • te10
  • tm01
  • tm10
Answer: te10
Q23 | The propagation constant for a lossless transmission line will be
  • real
  • complex
  • real and equal to phase constant
  • complex and equal to phase constant
Answer: complex and equal to phase constant
Q24 | Which of the following parameter is non zero for a lossless line?
  • attenuation
  • resistance
  • conductance
  • phase constant
Answer: phase constant
Q25 | The phase and group velocities does not depend on which of the following?
  • frequency
  • wavelength
  • phase constant
  • attenuation constant
Answer: attenuation constant
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