Advanced Electromagnetic Theory MCQ

Test your knowledge with important Advanced Electromagnetic Theory MCQ and their applications. These MCQs are beneficial for competitive exams too. Explore 30 + more Advanced Electromagnetic Theory MCQs at Bissoy

• Consider a lossless antenna with a directive gain of +6 decibel. If 1 milliwatt of power is fed to it, the total power radiated by the antenna will be (in milliwatt)
  ক

  4

  খ

  1

  গ

  7

  ঘ

  1/4
• In a microwave test bench, why is the microwave signal amplitude modulated at 1 kHz?
  ক

  To increase the sensitivity of measurement

  খ

  To transmit the signal to a far off place

  গ

  To study amplitude modulation

  ঘ

  Because crystal detector fails at microwave frequencies
• The modes in a rectangular waveguide are denoted by TEmn / TMmn, where m and n are the Eigen values along the larger and smaller dimensions of the waveguide respectively. Which one of the following statements is true?
  ক

  The TM10 mode does not exist

  খ

  The TE10 mode does not exist

  গ

  The TE10 and TM10 both exist and have same cut off frequencies

  ঘ

  When m and n are increases, the cut off frequency decreases
• Which one of the following field patterns represents a TEM wave travelling in the positive x direction?
  ক

  E = +8y, H = -4z

  খ

  E = -2y, H = -3z

  গ

  E = +2z, H = +2y

  ঘ

  E = -3y, H = +4z
• A transmission line of pure resistance characteristic impedance is terminated with an unknown load. The measured value of VSWR on the line is 2 and a voltage minimum point is found to be at the load. The load impedance is then
  ক

  Complex

  খ

  Purely capacitive

  গ

  Purely resistive

  ঘ

  Purely inductive
• A two wire transmission line of characteristic impedance Z is connected to a load impedance ZL(ZL and Zo are not equal). Impedance matching cannot be achieved with
  ক

  A quarter wavelength transformer

  খ

  A half wavelength transformer

  গ

  An open circuited parallel stub

  ঘ

  A short circuited parallel stub
• A transmission line whose characteristic impedance is a pure resistance
  ক

  Must be a lossless line

  খ

  Must be a distortionless line

  গ

  May not be a lossless line

  ঘ

  May be a lossless and may not be a distortionless line
• Consider a transmission line of characteristic impedance 50 ohm. Let it be terminated at one end by +j50 ohm. The VSWR produced by it in the transmission line will be
  ক

  1

  খ

  0

  গ

  Infinity

  ঘ

  +j
• Which parameters cannot be computed from the Smith chart?
  ক

  Impedance

  খ

  Admittance

  গ

  Reflection coefficient and VSWR

  ঘ

  Intrinsic impedance
• In the design of a single mode step index optical fiber close to upper cut off, the single mode operation is NOT preserved if
  ক

  Radius as well as operating wavelength are halved

  খ

  Radius as well as operating wavelength are doubled

  গ

  Radius is halved and operating wavelength is doubled

  ঘ

  Radius is doubled and operating wavelength is halved