Magnetic Circuit Multiple choice Questions & Answers

Best Magnetic Circuit Multiple choice Questions and Answers

Dear Readers, Welcome to Magnetic Circuit Objective Questions have been designed specially to get you acquainted with the nature of questions you may encounter during your Job interview for the subject of Magnetic Circuit MCQs. These objective type Magnetic Circuit Questions are very important for campus placement test and job interviews. As per my experience good interviewers hardly plan to ask any particular question during your Job interview and these model questions are asked in the online technical test and interview of many IT companies.

1. An air gap is usually inserted in magnetic circuits to

2. The relative permeability of a ferromagnetic material is

3. The unit of magnetic flux is

4. Permeability in a magnetic circuit corresponds to______ in an electric circuit.

5. Point out the wrong statement.

6.  Relative permeability of vacuum is

 

7.  Permanent magnets are normally made of

8.  Energy stored by a coil is doubled when its current is increased by percent.

9. Those magnetic materials are best suited for making armature and transformer cores which have____permeability and_______hystersis loss.

 

10. The rate of rise of current through an inductive coil is maximum

11. When both the inductance and resistance of a coil are doubled the value of

12. The initial rate of rise of current through a coil of inductance 10 H when suddenly connected to a D.C. supply of 200 V is_______Vs

13. A material for good magnetic memory should have

14. Conductivity is analogous to

15. In a magnetic material hysteresis loss takes place primarily due to

16. Those materials are well suited for making permanent magnets which have______retentivity and _______coercivity.

17. If the area of hysteresis loop of a material is large, the hysteresis loss in this material will be

 

18. Hard steel is suitable for making permanent magnets because

19. Silicon steel is used in electrical machines because it has

20. Conductance is analogous to

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

 

22. The unit of retentivity is

23. Reciprocal of reluctance is

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

25. The unit of reluctance is

26. A ferrite core has less eddy current loss than an iron core because

27. Hysteresis loss least depends on

28. Laminated cores, in electrical machines, are used to reduce