Electromagnetics Field (3140912) MCQs

MCQs of Magnetic forces, materials and inductance

Showing 31 to 40 out of 171 Questions
1 2 3 4 5 6
31.
Gilbert is a unit of
(a) Electromotive force
(b) Magnetomotive force
(c) Conductance
(d) Permittivity
Answer:

Option (b)

32.
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) Soft iron shielding is used
(c) Plastic shielding is provided
(d) Shielding of nonmagnetic material is used
Answer:

Option (b)

33.
Reciprocal of permeability is
(a) Reluctivity
(b) Susceptibility
(c) Permittivity
(d) Conductance
Answer:

Option (a)

34.
Relative permeability is less than unity is case of
(a) Ferromagnetic materials
(b) Ferrites
(c) Non-ferrous materials
(d) Diamagnetic materials
Answer:

Option (d)

35.
Unit of magnetic flux density is
(a) Weber
(b) Lumens
(c) Tesla
(d) None of above
Answer:

Option (c)

36.
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:

Option (b)

37.
Which of the following is not a unit of flux?
(a) Maxwell
(b) Telsa
(c) Weber
(d) All of above
Answer:

Option (b)

38.
Which of the following material has the maximum permeability ?
(a) Brass
(b) Copper
(c) Zinc
(d) Ebonite
Answer:

Option (d)

39.
One telsa is equal to
(a) 1 Wb/mm2
(b) 1 Wb/m
(c) 1 Wb/m2
(d) 1 mWb/m2
Answer:

Option (c)

40.
Concerning an electric field, which statement is not true?
(a) The electric field intensity is a vector quantity
(b) The electric field intensity at a point is numerically equal to the force exerted on a charge placed at that point
(c) An electric field is defined as a point in space at which an electric charge experiences a force
(d) Unit field intensity in the exertion of a force of one newton on a charge of one is coulomb
Answer:

Option (b)

Showing 31 to 40 out of 171 Questions
1 2 3 4 5 6