Magnetic Circuit MCQ

Magnetic Circuit MCQ

  • Admin
  • 23rd Feb, 2023

Take Magnetic Circuit MCQ Test to Test Your Knowledge

Practie here the best Magnetic Circuit MCQ Questions that checks your basic knowledge of Magnetic Circuit. This Magnetic Circuit MCQ Test contains 20+ Multiple Choice Questions. Choose the right answer for every questions to check your final preparation for your Exams. Apart from this, you can also download here Magnetic Circuit MCQ PDF, completely free.

Magnetic Circuit MCQ Test

1) What is the unit of magnetic flux?

  • A. Weber
  • B.Henry
  • C.Ampere/metre
  • D.Ampere-turn/weber

2) Thin lamination are used in a machine in order to reduce

  • A. Copper loss
  • B.Hysteresis loss
  • C.Eddy current loss
  • D.None of the above

3) What is the relative permeability of vacuum?

  • A. 1
  • B.1/4JI
  • C.1 H/m
  • D.4n × 10' H/m

4) Permanent magnets are normally made of

  • A. Cast iron
  • B.Aluminium
  • C.Alnico alloys
  • D.Wrought iron

5) Those magnetic materials are best suited for making armature and transform cores which have ____ permeability and ____ hysteresis loss.

  • A. High, high
  • B.Low, high
  • C.High, low
  • D.Low, low
Download Free : Magnetic Circuit MCQ PDF

6) A magnetic circuit is made up of one or more closed loop paths containing a magnetic flux.

  • A. True
  • B.False

7) An air gap is usually inserted in magnetic circuits to ____.

  • A. Increase m.m.f
  • B.Increase the flux
  • C.prevent saturation
  • D.None of the above

8) Reciprocal of reluctance is:

  • A. Reluctivity
  • B.Permeance
  • C.Permeability
  • D.Susceptibility

9) Hysteresis loss least depends on:

  • A. Volume of material
  • B.Frequency
  • C.Steinmetz’s coefficient of material
  • D.Ambient temperature

10) An air gap is usually inserted in magnetic circuits to ____.

  • A. Increase m.m.f.
  • B.Increase the flux
  • C.Prevent saturation
  • D.None of the above

11) A ferrite core has less eddy current loss than an iron core because _____.

  • A. Ferrites have high resistance
  • B.Ferrites have high hysteresis
  • C.Ferrites have low permeability
  • D.Ferrites are magnetic

12) What is the use of Laminated cores, in electrical machines?

  • A. Copper loss
  • B.Eddy current loss
  • C.Hysteresis loss
  • D.All of the above

13) While comparing magnetic and electric circuits, the flux of magnetic circuit is compared with which parameter of electrical circuit?

  • A. E.M.F.
  • B.Current
  • C.Current density
  • D.Conductivity

14) What is the unit of reluctance?

  • A. Meter/Henry
  • B.Henry/meter
  • C.Henry
  • D.1/Henry

15) Is Magnetic reluctance is a scalar extensive quantity?

  • A. Yes
  • B.No

16) What is the dimension of Magnetic reluctance?

  • A. M−1 L−2 T2 I2
  • B.M1 L−2 T2 I2
  • C.M−1 L2 T2 I2
  • D.M−1 L−2 T2 I12

17) Permanent magnets are normally made of:

  • A. Alnico alloys
  • B.Aluminium
  • C.Cast iron
  • D.Wrought iron

18) Conductance is analogous to:

  • A. Permeance
  • B.Reluctance
  • C.Flux
  • D.Inductance

19) The unit of retentivity is ___.

  • A. Weber
  • B.Weber/sq. m
  • C.Ampere turn/meter
  • D.Ampere turns

20) The property of a material which opposes the creation of magnetic flux in it is known as Reluctance.

  • A. True
  • B.False

21) Which object would a magnet attract?

  • A. a glass bottle
  • B.a rubber eraser
  • C.a piece of paper
  • D.a steel paper clip

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