Magnetism & Electromagnetism(Electrical Engineering Questions ) Questions and Answers

Question 1. The direction of magnetic lines of force is________________?
  1.    from south pole to north pole
  2.    from north pole to south pole
  3.    from one end of the magnet to another
  4.    none of the above
Explanation:-
Answer: Option B. -> from north pole to south pole
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 2. Ferrites are materials
  1.    paramagnetic
  2.    diamagnetic
  3.    ferromagnetic
  4.    none of the above
Explanation:-
Answer: Option C. -> ferromagnetic
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 3. The materials having low retentivity are suitable for making_____________?
  1.    weak magnets
  2.    temporary magnets
  3.    permanent magnets
  4.    none of the above
Explanation:-
Answer: Option B. -> temporary magnets
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 4. A magnetic field exists around____________?
  1.    iron
  2.    copper
  3.    aluminium
  4.    moving charges
Explanation:-
Answer: Option D. -> moving charges
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 5. Tesla is a unit of_____________?
  1.    field strength
  2.    inductance
  3.    flux density
  4.    flux
Explanation:-
Answer: Option C. -> flux density
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 6. A permeable substance is one_____________?
  1.    which is a good conductor
  2.    which is a bad conductor
  3.    which is a strong magnet
  4.    through which the magnetic lines of force can pass very easily
Explanation:-
Answer: Option D. -> through which the magnetic lines of force can pass very easily
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 7. The two conductors of a transmission line carry equal current I in opposite directions. The force on each conductor is________________?
  1.    proportional to 7
  2.    proportional to X
  3.    proportional to distance between the conductors
  4.    inversely proportional to I
Explanation:-
Answer: Option B. -> proportional to X
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 8. A material which is slightly repelled by a magnetic field is known as_____________?
  1.    ferromagnetic material
  2.    diamagnetic material
  3.    paramagnetic material
  4.    conducting material
Explanation:-
Answer: Option B. -> diamagnetic material
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 9. Air gap has_________eluctance as compared to iron or steel path?
  1.    little
  2.    lower
  3.    higher
  4.    zero
Explanation:-
Answer: Option B. -> lower
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 10. Which of the following is a vector quantity ?
  1.    Relative permeability
  2.    Magnetic field intensity
  3.    Flux density
  4.    Magnetic potential
Explanation:-
Answer: Option B. -> Magnetic field intensity
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
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