electrical

Magnetism and Electromagnetism MCQ Page - 1

1.

Tesla is a unit of

Answer/ Hint      

Answer : C

Explanation :

2.

A permeable substance is one

Answer/ Hint      

Answer : D

Explanation :

3.

The materials having low retentively are suitable for making

Answer/ Hint      

Answer : B

Explanation :

4.

A magnetic field exits around

Answer/ Hint      

Answer : D

Explanation :

5.

A magnet does not attract

Answer/ Hint      

Answer : C

Explanation :

6.

Aluminium and platinum are ………. Materials

Answer/ Hint      

Answer : C

Explanation :

7.

Ferrites are ……. materials

Answer/ Hint      

Answer : C

Explanation :

8.

Air gap has …………….. reluctance as compared to iron or steel path

Answer/ Hint      

Answer : B

Explanation :

9.

The direction of magnetic lines of force is

Answer/ Hint      

Answer : B

Explanation :

10.

Which of the following is the vector quantity?

Answer/ Hint      

Answer : B

Explanation :

11.

The two conductors of a transmission line carry equal current I in opposite directions. The force on each conductor is

Answer/ Hint      

Answer : B

Explanation :

12.

A material which is slightly repelled by a magnetic field is known as

Answer/ Hint      

Answer : B

Explanation :

13.

When an iron pieces are placed in magnetic field

Answer/ Hint      

Answer : B

Explanation :

14.

Fleming’s left-hand rule is used to find

Answer/ Hint      

Answer : C

Explanation :

15.

The ratio of intensity of magnetisation to the magnetisation force is known as

Answer/ Hint      

Answer : B

Explanation :

16.

Magnetising steel is normal difficult because

Answer/ Hint      

Answer : D

Explanation :

17.

The left-hand rule correlates to

Answer/ Hint      

Answer : D

Explanation :

18.

The unit of relative permeability is

Answer/ Hint      

Answer : D

Explanation :

19.

A conductor of length L has current I passing through it, when it is placed parallel to a magnetic field. The force experienced by the conductor will be

Answer/ Hint      

Answer : A

Explanation :

20.

The force between two long parallel conductors is inversely proportional to

Answer/ Hint      

Answer : D

Explanation :

21.

Material subjected to rapid reversal of magnetism should have

Answer/ Hint      

Answer : B

Explanation :

22.

 Indicate which of the following material does not retain magnetism permanently

Answer/ Hint      

Answer : A

Explanation :

23.

The main constitute of permalloy is

Answer/ Hint      

Answer : C

Explanation :

24.

The use of permanent magnet is not made in

Answer/ Hint      

Answer : C

Explanation :

25.

Paramagnetic materials have relative permeability

Answer/ Hint      

Answer : C

Explanation :

26.

Degaussing is the process of

Answer/ Hint      

Answer : D

Explanation :

27.

Substance which have permeability less than permeability of free space is known as

Answer/ Hint      

Answer : C

Explanation :

28.

Two infinity long parallel conductors in vacuum and separated 1 meter between centres when a current of 1 amp flows through each conductor, produce a each other a force of

Answer/ Hint      

Answer : D

Explanation :

29.

In the left-hand rule, forefinger always represents

Answer/ Hint      

Answer : C

Explanation :

30.

Which of the following is a Ferro-magnetic material?

Answer/ Hint      

Answer : D

Explanation :

31.

Ferrites are a sub-group of

Answer/ Hint      

Answer : D

Explanation :

32.

Gilbert is a unit of

Answer/ Hint      

Answer : B

Explanation :

33.

The working of a meter is based on the use of a permanent magnet. In order to protect the meter functioning from stray magnetic field

Answer/ Hint      

Answer : B

Explanation :

34.

Reciprocal of permeability is

Answer/ Hint      

Answer : A

Explanation :

35.

The relative permeability is less than unity in case of

Answer/ Hint      

Answer : D

Explanation :

36.

Which of the following is the unit of magnetic flux density?

Answer/ Hint      

Answer : C

Explanation :

37.

The magnetism left in the iron after exciting field has been removed is known as

Answer/ Hint      

Answer : B

Explanation :

38.

Which of the following is not a unit of flux?

Answer/ Hint      

Answer : B

Explanation :

39.

Which of the following expected to have the maximum permeability?

Answer/ Hint      

Answer : D

Explanation :

40.

1 tesla is equal to

Answer/ Hint      

Answer : C

Explanation :

41.

How much will be the flux density in tesla units for flux of 45µ Wb through 6 x 10-4 m² ?

Answer/ Hint      

Answer : A

Explanation :

42.

When a magnetic is in motion relative to a coil the induced e.m.f does not depend upon

Answer/ Hint      

Answer : A

Explanation :

43.

One Maxwell is equal to

Answer/ Hint      

Answer : D

Explanation :

44.

Super magnetic materials are composed of

Answer/ Hint      

Answer : C

Explanation :

45.

When two ends of circular uniform wire are joined to the terminals of a battery, the field at the centre of the circle

Answer/ Hint      

Answer : D

Explanation :

Magnetism and Electromagnetism MCQ Page - 1
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