ENGINEERING ECONOMICS QUIZ

Degaussing is the process of

Removal of magnetic impurities

Demagnetising metallic parts

Removing gases from the materials

Remagnetising metallic parts

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The uniform magnetic field is

The field of a set of parallel conductors

The field of a single conductor

The field in which all lines of magnetic flux are parallel and equidistant

None of the listed here

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

diamagnetic material

ferromagnetic material

paramagnetic material

conducting material

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

residual magnetism

susceptance

reluctance

permeance

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Out of the following statements, concerning an electric field, which statement is not true?

The electric intensity is a vector quantity

An electric field is defined as a point in space at which an electric charge would experience a force

Unit field intensity in the exertion of a force of one newton on a charge of one coulomb

The electric field intensity at a point is numerically equal to the force exerted upon a charge placed at that point

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The initial permeability of an iron rod is

The highest permeability of the iron rod

The lowest permeability of the iron rod

The permeability almost in non-magnetised state

The permeability at the end of the iron rod

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The stray line of magnetic flux is defined as

A line vertical to the flux lines

A line of magnetic flux which does not follow the designed path

The mean length of a ring shaped coil

A line of magnetic flux in a non-uniform field

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Temporary magnets are used in

Motors

Generators

All of the listed here

Loud speakers

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A rectangular magnet of magnetic moment M is cut into two piece of same length, the magnetic moment of each piece will be

M

2M

M/4

M/2

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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

10 N

0.1 N

100 N

0.01 N

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