Electrical Engineering : Magnetism And Electromagnetism QUESTIONS AND ANSWERS :: part3 : 16 to 20

Following Electrical Engineering Multiple choice objective type questions and answers will help you in BSNL JTO, GATE 2024 and IES 2024 examinations :

16.The retentivity (a property) of material is useful for the construction of

permanent magnets

transformers

non-magnetic substances

electromagnets

17.The stray line of magnetic flux is defined as

a line vertical to the flux lines

the mean length of a ring shaped coil

a line of magnetic flux in a non-uniform field

a line of magnetic flux which does not follow the designed path

18.The magnetic reluctance of a material

decreases with increasing cross sectional area of material

increases with increasing cross-sec-tional area of material

does not vary with increasing cross-sectional area of material

any of the above

19.The initial permeability of an iron rod is

the highest permeability of the iron rod

the lowest permeability of the iron rod

the permeability at the end of the iron rod

the permeability almost in non-magnetised state

20.A keeper is used to

change the direction of magnetic lines

amplify flux

restore lost flux

provide a closed path for flux

More Magnetism And Electromagnetism QUESTIONS AND ANSWERS available in next pages

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Electrical Engineering Questions And Answers :: Magnetism And Electromagnetism: part3

Magnetism And Electromagnetism QUESTIONS AND ANSWERS

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