Explore topic-wise MCQs in Electrical Engineering Questions.

This section includes 81 Mcqs, each offering curated multiple-choice questions to sharpen your Electrical Engineering Questions knowledge and support exam preparation. Choose a topic below to get started.

1.

One telsa is equal to___________?
A. 1 Wb/mm2
B. 1 Wb/m
C. 1 Wb/m2
D. 1 mWb/m2
Answer» D. 1 mWb/m2
Discussion
2.

he retentivity (a property) of material is useful for the construction of__________?
A. permanent magnets
B. transformers
C. non-magnetic substances
D. electromagnets
Answer» B. transformers
Discussion
3.

Temporary magnets are used in______________?
A. loud-speakers
B. generators
C. motors
D. all of the above
Answer» E.
Discussion
4.

The main constituent of permalloy is_____________?
A. cobalt
B. chromium
C. nickel
D. tungsten
Answer» D. tungsten
Discussion
5.

The direction of magnetic lines of force is________________?
A. from south pole to north pole
B. from north pole to south pole
C. from one end of the magnet to another
D. none of the above
Answer» C. from one end of the magnet to another
Discussion
6.

The use of permanent magnets is. not made in_____________?
A. magnetoes
B. energy meters
C. transformers
D. loud-speakers
Answer» D. loud-speakers
Discussion
7.

Two infinitely long parallel conductors in vacuum any separated 1 metre between centers >then a current of 1 ampere flows the. uk each conductor, produce on each other a force of_________________?
A. 2 x 1(T2 N/m)
B. 2 x KT3 N/m
C. 2 x 10″5 N/m
D. 2x 1(T7 N/m)
Answer» E.
Discussion
8.

Gilbert is a unit of_______________?
A. electromotive force
B. magnetomotive force
C. conductance
D. permittivity
Answer» C. conductance
Discussion
9.

Paramagnetic materials have relative permeability________________?
A. slightly less than unity
B. equal to unity
C. slightly more than unity
D. equal to that ferromagnetic mate rials
Answer» D. equal to that ferromagnetic mate rials
Discussion
10.

In the left hand rule, forefinger always represents______________?
A. voltage
B. current
C. magnetic field
D. direction of force on the conductor
Answer» D. direction of force on the conductor
Discussion
11.

Fleming’s left hand rule is used to find_________________?
A. direction of magnetic field due to current carrying conductor
B. direction of flux in a solenoid
C. direction of force on a current carrying conductor in a magnetic field
D. polarity of a magnetic pole
Answer» D. polarity of a magnetic pole
Discussion
12.

Ferrites are a sub-group of_______________?
A. non-magnetic materials
B. ferro-magnetic materials
C. paramagnetic materials
D. ferri-magnetic materials
Answer» E.
Discussion
13.

Substances which have permeability less than the permeability of free space are known as_____________?
A. ferromagnetic
B. paramagnetic
C. diamagnetic
D. bipolar
Answer» D. bipolar
Discussion
14.

Reciprocal of permeability is____________?
A. reluctivity
B. susceptibility
C. permittivity
D. conductance
Answer» B. susceptibility
Discussion
15.

Indicate which of the following material does not retain magnetism permanently
A. Soft iron
B. Stainless steel
C. Hardened steel
D. None of the above
Answer» B. Stainless steel
Discussion
16.

Magnetising steel is normals difficult because____________?
A. it corrodes easily
B. it has high permeability
C. it has high specific gravity
D. it has low permeability
Answer» E.
Discussion
17.

When an iron piece is placed in a magnetic field_____________?
A. the magnetic lines of force will bend away from their usual paths in order to go away from the piece
B. the magnetic lines of force will bend away from their usual paths in order to pass through the piece
C. the magnetic field will not be affected
D. the iron piece will break
Answer» C. the magnetic field will not be affected
Discussion
18.

The ratio of intensity of magnetisation to the magnetisation force is known as_____________?
A. flux density
B. susceptibility
C. relative permeability
D. none of the above
Answer» C. relative permeability
Discussion
19.

Materials subjected to rapid reversal of magnetism should have______________?
A. large area oiB-H loop
B. high permeability and low hysteresis loss
C. high co-ercivity and high retentivity
D. high co-ercivity and low density
Answer» C. high co-ercivity and high retentivity
Discussion
20.

The unit of relative permeability is_____________?
A. henry/metre
B. henry
C. henry/sq. m
D. it is dimensionless
Answer» E.
Discussion
21.

The left hand rule correlates to______________?
A. current, induced e.m.f. and direction of force on a conductor
B. magnetic field, electric field and direction of force on a conductor
C. self induction, mutual induction and direction of force on a conductor
D. current, magnetic field and direction of force on a conductor
Answer» E.
Discussion
22.

The force between two long parallel conductors is inversely proportional to_____________?
A. radius of conductors
B. current in one conductor
C. product of current in two conductors
D. distance between the conductors
Answer» E.
Discussion
23.

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______________?
A. zero
B. BLI
C. B2LI
D. BLI2
Answer» B. BLI
Discussion
24.

Which of the following is the unit of magnetic flux density ?
A. weber
B. lumens
C. tesla
D. none of the above
Answer» D. none of the above
Discussion
25.

A magnetic field exists around____________?
A. iron
B. copper
C. aluminium
D. moving charges
Answer» E.
Discussion
26.

Ferrites are materials
A. paramagnetic
B. diamagnetic
C. ferromagnetic
D. none of the above
Answer» D. none of the above
Discussion
27.

A permeable substance is one_____________?
A. which is a good conductor
B. which is a bad conductor
C. which is a strong magnet
D. through which the magnetic lines of force can pass very easily
Answer» E.
Discussion
28.

Air gap has_________eluctance as compared to iron or steel path?
A. little
B. lower
C. higher
D. zero
Answer» C. higher
Discussion
29.

Tesla is a unit of_____________?
A. field strength
B. inductance
C. flux density
D. flux
Answer» D. flux
Discussion
30.

Which of the following is a vector quantity ?
A. Relative permeability
B. Magnetic field intensity
C. Flux density
D. Magnetic potential
Answer» C. Flux density
Discussion
31.

The two conductors of a transmission line carry equal current I in opposite directions. The force on each conductor is________________?
A. proportional to 7
B. proportional to X
C. proportional to distance between the conductors
D. inversely proportional to I
Answer» C. proportional to distance between the conductors
Discussion
32.

A material which is slightly repelled by a magnetic field is known as_____________?
A. ferromagnetic material
B. diamagnetic material
C. paramagnetic material
D. conducting material
Answer» C. paramagnetic material
Discussion
33.

When two ends of a circular uniform wire are joined to the terminals of a battery, the field at the center of the circle?
A. will be zero
B. will be infinite
C. will depend on the amount of e.m.f. applied
D. will depend on the radius of the circle
Answer» E.
Discussion
34.

The electromagnet has 50 turns and a current of 1A flows through the coil. If the length of the magnet circuit is 200 mm, what is the magnetic field strength ?
A. 2500 AT/m
B. 250 AT/m
C. 25 AT/m
D. 2.5 AT/m
Answer» C. 25 AT/m
Discussion
35.

A 300 mm long conductor is carrying a current of 10 A and is situated at right angles to a magnetic field having a flux density of 0.8 T ; the force on the conductor will be____________?
A. 240 N
B. 24 N
C. 2.4 N
D. 0.24 N
Answer» D. 0.24 N
Discussion
36.

A square cross-sectional magnet has a pole strength of 1 x 10 Wb and cross sectional area of 20 mm x 20 mm. What is the strength at a distance of 100 mm from the unit pole in air ?
A. 63.38 N/Wb
B. 633.8 N/Wb
C. 6338 N/Wb
D. 63380 N/Wb
Answer» D. 63380 N/Wb
Discussion
37.

Unit for quantity of electricity is_____________?
A. ampere-hour
B. watt
C. joule
D. coulomb
Answer» E.
Discussion
38.

Two long parallel conductors carry 100 A. If the conductors are separated by 20 mm, the force per meter of length of each conductor will be_____________?
A. 100 N
B. 10 N
C. 1 N
D. 0.1 N
Answer» E.
Discussion
39.

What is the magnitude and the direction of force per 1.1m length of a pair of conductors of a direct current linecarrying 10 amperes and spaced 100 mm apart ?
A. 22 x 10″8 N
B. 22 x 10″7 N
C. 22 x 10-6 N
D. 22 x 10″5 N
Answer» E.
Discussion
40.

The relative permeability is less than unity is case of_____________?
A. ferromagnetic materials
B. ferrites
C. non-ferrous materials
D. diamagnetic materials
Answer» E.
Discussion
41.

Which of the following is not a unit of flux?
A. Maxwell
B. Telsa
C. Weber
D. All of the above
Answer» C. Weber
Discussion
42.

The working of a meter is based on the use of a permanent magnet. In order to protect the meter functioning from stray magnetic fields______________?
A. meter is surrounded by strong magnetic fields
B. a soft iron shielding is used
C. a plastic shielding is provided
D. a shielding of anon-magnetic material is used
Answer» C. a plastic shielding is provided
Discussion
43.

The bar magnet has____________?
A. the dipole moment
B. monopole moment
C. A. and B. both
D. none of the above
Answer» B. monopole moment
Discussion
44.

Which of the following is expected to have the maximum permeability ?
A. Brass
B. Copper
C. Zinc
D. Ebonite
Answer» E.
Discussion
45.

The magnetism left in the iron after exciting field has been removed is known as____________?
A. permeance
B. residual magnetism
C. susceptance
D. reluctance
Answer» C. susceptance
Discussion
46.

One maxwell is equal to____________?
A. 10 webers
B. 10 webers
C. 10 webers
D. 10 webers
Answer» E.
Discussion
47.

The stray line of magnetic flux is defined as_____________?
A. a line vertical to the flux lines
B. the mean length of a ring shaped coil
C. a line of magnetic flux in a non-uniform field
D. a line of magnetic flux which does not follow the designed path
Answer» E.
Discussion
48.

How does the magnetic compass needle behave in a magnetic field ?
A. It assures a position right angle to magnetic field
B. It starts rotating
C. It assures a position which follows a line of magnetic flux
D. None of the above
Answer» D. None of the above
Discussion
49.

Out of the following statements, concerning an electric field, which statement is not true ?
A. The electric intensity is a vector quantity
B. The electric field intensity at a point is numerically equal to the force exerted upon a charge placed at that point
C. An electric field is defined as a point in space at which an electric charge would experience a force
D. Unit field intensity in the exertion of a force of one newton on a charge of one coulomb
Answer» C. An electric field is defined as a point in space at which an electric charge would experience a force
Discussion
50.

For which of the following materials the saturation value is the highest ?
A. Ferromagnetic materials
B. Paramagnetic materials
C. Diamagnetic materials
D. Ferrites
Answer» E.
Discussion