Electrical Engineering Mcqs

A permanent magnet______________?
  • (A)  attracts some substances and repels others
  • (B)  attracts all paramagnetic substances and repels others
  • (C)  attracts only ferromagnetic substances
  • (D)  attracts ferromagnetic substances and repels all others
A keeper is used to_____________?
  • (A)  change the direction of magnetic lines
  • (B)  amplify flux
  • (C)  restore lost flux
  • (D)  provide a closed path for flux
The uniform magnetic field is______________?
  • (A)  the field of a set of parallel conductors
  • (B)  the field of a single conductor
  • (C)  the field in which all lines of magnetic flux are parallel and equidistant
  • (D)  none of the above
The magneto-motive force is______________?
  • (A)  the voltage across the two ends of exciting coil
  • (B)  the flow of an electric current
  • (C)  the sum of all currents embraced by one line of magnetic field
  • (D)  the passage of magnetic field through an exciting coil