The force which set ups or tends to set up magnetic flux in a magnetic circuit

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The force which set ups or tends to set up magnetic flux in a magnetic circuit

A. Dynamic force

B. Electromotive force

C. Potential difference

D. Magnetomotive force

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Paramagnetic substance has a relative permeability of

A. Slightly less than one

B. Equal to one

C. Slightly equal to one

D. Very much greater than one

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Who discovered that a current-carrying conductor would move when placed in a magnetic field?

A. Michael Faraday

B. Andre Ampere

C. Hans Christian Oersted

D. Gustav Robert Kirchhoff

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Defined as a closed path in which magnetic induction or flux flows

A. Electric circuit

B. Magnetic circuit

C. Electronic circuit

D. Electromagnetic circuit

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The dielectric constant of most materials lies between

A. 1 and 10

B. 10 and 20

C. 20 and 50

D. 50 and 100

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Magnetic field intensity is a ________ quantity.

A. scalar

B. phasor

C. vector

D. variable

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A theorem which states that an electric current flowing in a circuit produces a magnetic field at external points equivalent to that due to a magnetic shell whose bounding edge is the conductor and whose strength of the current.

A. Joule's law

B. Faraday's law

C. Volta's theorem

D. Ampere's theorem

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If the magnetic material is located within a coil through which alternating current (60 Hz frequency) flowsa then __________ hysteresis loops will be formed

A.

B.

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Calculate the flux density that will be produced by the field intensity of 2000 a. t/m for a permeability of 126 x 10^-6 T/A.t/m

A. 0.252 G

B. 0.252 x 10^-2 T

C. 0.252 T

D. 0.252 x 10^-2 G

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The reluctance of a magnetic circuit is not dependent on which of the following?

A. Number of turns of coil

B. Magnetomotive force

C. Flux density in the circuit

D. Current in the coil

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The force of attraction or repulsion between two magnetic poles is inversely proportional to the square of the distance between them. This is known as

A. Newton's first law

B. Faraday's first law of electromagnetic induction

C. Coulomb's first law

D. Coulomb's second law

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Electric field intensity at a point is numerically equal to ________ at that point.

A. potential gradient

B. potential difference

C. dielectric constant

D. the force

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The ratio of the permeability of material to the permiabiity of air or vacuum.

A. Relative permeability

B. Relative permittivity

C. Relative conductivity

D. Relative reluctivity

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Bonding of atoms that is due to the force of attraction between positive ions and a group of negative ions

A. Ionic bond

B. Covalent Bond

C. Electrostatic Bond

D. Metallic bond

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One electron volt (1 eV) is equivalent to _____ joules

A. 1.3 x 10^-19

B. 1.4 x 10^-19

C. 1.5 x 10^-19

D. 1.6 x 10^-19

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Magnetic effects of the earth as a huge magnet with north and south poles.

A. Diamagnetic

B. Ferromagnetic

C. Terrestrial magnetism

D. Terrestrial ferromagnetism

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What is the relative permittivity of air?

A.

B.

C. 8.854 × 10^-12

D. 4 × 10^7

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Defined as the flux density produced in it due to its own induced magnetism

A. Magnetic field intensity

B. Electric field intensity

C. Electromagnetic field intensity

D. Intensity magnetization

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The relation between absolute permittivity of air ( 0)a absolute p and velocity of light (c) is given by

A. 0 0= c^2

B. 0 0= c

C. 1/ 0 0= c

D. 1/ 0 0= c^2

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All matters (gasa liquid and solid) are composed of

A. Neutrons

B. Particles

C. Electrons

D. Atoms

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A commercial alloy of aluminum nickela and iron with cobalta copper and titanium added to produce about 12 grades.

A. Alnico

B. Brass

C. Aluminum

D. Constantan

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Which of the following materials has permeability slightly less than that of free space?

A. Paramagnetic

B. Non- magnetic

C. Ferromagnetic

D. Diamagnetic

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Flux linkages equals

A. Flux times area of core

B. Flux times number of turns times area of core

C. Flux times number of turns times length of core

D. Flux times number of turns

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What is the usual value of leakage coefficient for electrical machines?

A. 0.5 to 1

B. 1 to 5

C. 5 to 10

D. 1.15 to 1.25

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If the resistance of a material 2 m long and 2 m^2 in area of cross-section is 1.6 ×10^-8 ?a then its resistivity is

A. 3.2 × 10^-8 ?-m

B. 1.6 × 10^-8 ?-m

C. 0.64 × 10^-8 ?-m

D. 0.16 × 10^-8 ?-m

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The ratio between the intensity of magnetization produced in a substance to the magnetizing force producing it

A. Magnetic Reluctivity

B. Magnetic Resistivity

C. Magnetic susceptibility

D. Magnetic conductivity

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States that the ratio of the thermal conductivity is proportional to the absolute temperature for all metals.

A. Wien's displacement law

B. Hartleys law

C. Hall's law

D. Wiedemann Franz law

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The magnetic materials should have a large hysteresis loss for one of the following applications.

A. Transformers

B. ACmotors

C. Permanent Magnets

D. DC generators

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Hipernik is an alloy containing iron and nickel.

A. 40% ; 60%

B. 60% ; 40%

C. 50% ; 50%

D. 70% ; 30%

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Formed when there exist distant electronic interactions between (opposite) charges present in the neighboring atoms or molecules.

A. Ionic bond

B. Covalent bond

C. Metallic bond

D. Van der Waals bond

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A one cubic cm of copper has how many free electrons at room temperature?

A. 80 × 10^18

B. 8.5 × 10^22

C. 20 × 10^10

D. 50 × 10^20

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Accepted Answer

D. Magnetomotive force

The force which set ups or tends to set up magnetic flux in a magnetic circuit

Correct Answer :

Show all Electricity Fundamentals MCQ

Related Questions

Paramagnetic substance has a relative permeability of

Who discovered that a current-carrying conductor would move when placed in a magnetic field?

Defined as a closed path in which magnetic induction or flux flows

The dielectric constant of most materials lies between

Magnetic field intensity is a ________ quantity.

A theorem which states that an electric current flowing in a circuit produces a magnetic field at external points equivalent to that due to a magnetic shell whose bounding edge is the conductor and whose strength of the current.

If the magnetic material is located within a coil through which alternating current (60 Hz frequency) flowsa then __________ hysteresis loops will be formed

Calculate the flux density that will be produced by the field intensity of 2000 a. t/m for a permeability of 126 x 10^-6 T/A.t/m

The reluctance of a magnetic circuit is not dependent on which of the following?

The force of attraction or repulsion between two magnetic poles is inversely proportional to the square of the distance between them. This is known as

Electric field intensity at a point is numerically equal to ________ at that point.

The ratio of the permeability of material to the permiabiity of air or vacuum.

Bonding of atoms that is due to the force of attraction between positive ions and a group of negative ions

One electron volt (1 eV) is equivalent to _____ joules

Magnetic effects of the earth as a huge magnet with north and south poles.

What is the relative permittivity of air?

Defined as the flux density produced in it due to its own induced magnetism

The relation between absolute permittivity of air ( 0)a absolute p and velocity of light (c) is given by

All matters (gasa liquid and solid) are composed of

A commercial alloy of aluminum nickela and iron with cobalta copper and titanium added to produce about 12 grades.

Which of the following materials has permeability slightly less than that of free space?

Flux linkages equals

What is the usual value of leakage coefficient for electrical machines?

If the resistance of a material 2 m long and 2 m^2 in area of cross-section is 1.6 ×10^-8 ?a then its resistivity is

The ratio between the intensity of magnetization produced in a substance to the magnetizing force producing it

States that the ratio of the thermal conductivity is proportional to the absolute temperature for all metals.

The magnetic materials should have a large hysteresis loss for one of the following applications.

Hipernik is an alloy containing iron and nickel.

Formed when there exist distant electronic interactions between (opposite) charges present in the neighboring atoms or molecules.

A one cubic cm of copper has how many free electrons at room temperature?

Also checkout

The force which set ups or tends to set up magnetic flux in a magnetic circuit

Correct Answer :

Show all Electricity Fundamentals MCQ

Related Questions

Paramagnetic substance has a relative permeability of

Who discovered that a current-carrying conductor would move when placed in a magnetic field?

Defined as a closed path in which magnetic induction or flux flows

The dielectric constant of most materials lies between

Magnetic field intensity is a ________ quantity.

A theorem which states that an electric current flowing in a circuit produces a magnetic field at external points equivalent to that due to a magnetic shell whose bounding edge is the conductor and whose strength of the current.

If the magnetic material is located within a coil through which alternating current (60 Hz frequency) flowsa then __________ hysteresis loops will be formed

Calculate the flux density that will be produced by the field intensity of 2000 a. t/m for a permeability of 126 x 10^-6 T/A.t/m

The reluctance of a magnetic circuit is not dependent on which of the following?

The force of attraction or repulsion between two magnetic poles is inversely proportional to the square of the distance between them. This is known as

Electric field intensity at a point is numerically equal to ________ at that point.

The ratio of the permeability of material to the permiabiity of air or vacuum.

Bonding of atoms that is due to the force of attraction between positive ions and a group of negative ions

One electron volt (1 eV) is equivalent to _____ joules

Magnetic effects of the earth as a huge magnet with north and south poles.

What is the relative permittivity of air?

Defined as the flux density produced in it due to its own induced magnetism

The relation between absolute permittivity of air ( 0)a absolute p and velocity of light (c) is given by

All matters (gasa liquid and solid) are composed of

A commercial alloy of aluminum nickela and iron with cobalta copper and titanium added to produce about 12 grades.

Which of the following materials has permeability slightly less than that of free space?

Flux linkages equals

What is the usual value of leakage coefficient for electrical machines?

If the resistance of a material 2 m long and 2 m^2 in area of cross-section is 1.6 ×10^-8 ?a then its resistivity is

The ratio between the intensity of magnetization produced in a substance to the magnetizing force producing it

States that the ratio of the thermal conductivity is proportional to the absolute temperature for all metals.

The magnetic materials should have a large hysteresis loss for one of the following applications.

Hipernik is an alloy containing __________ iron and __________ nickel.

Formed when there exist distant electronic interactions between (opposite) charges present in the neighboring atoms or molecules.

A one cubic cm of copper has how many free electrons at room temperature?

Also checkout

Hipernik is an alloy containing iron and nickel.