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Electromagnetic Field Theory (Electrical Engineering) - MCQs

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A transmission line whose characteristics impedance is a pure resistance
  • A. must be lossless line
  • B. must be a distortion less lines
  • C. may not be lossless line
  • D. may not be a distortionless line

Which of the following is a vector quantity?
  • A. standing wave ratio only
  • B. reflection coefficient only
  • C. gain
  • D. standing wave ratio of reflection coefficient

What causes electromagnetic wave polarization?
  • A. refraction
  • B. reflection
  • C. longitudinal nature of electromagnetic wave
  • D. transverse nature of electromagnetic wave

An open coil has
  • A. zero resistance and zero inductance
  • B. infinite resistance and infinite inductance
  • C. infinite resistance and zero inductance
  • D. zero resistance and infinite inductance

lower the self inductance of a coil
  • A. more will be the weber turns
  • B. more will be the EMF induced
  • C. lesser the flux produced by it
  • D. smaller the delay in establishing steady current through it

If in an iron code coil the iron core is removed so as to make the air cored coil, the inductance of the coil will be
  • A. more
  • B. less
  • C. the same
  • D. none of these