How many electrons are needed in the valence orbit to give a material's stability?
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Two similar polesa each 1Wba placed 1 m apart in air will experience a repulsive force of
An electron- volt (eV) is a unit of
The uncharged particles which have no effect on its atomic charge.
What is the usual value of leakage coefficient for electrical machines?
A one cubic cm of copper has how many free electrons at room temperature?
Refers to the non- metallic materials that have the ferromagnetic properties of iron.
What bond is formed when electrons in the outermost energy orbits of the atoms are shared between two…
Three charges of +5 Ca -6 C and +9 C are placed inside a sphere. What is the total flux passing through…
Cobalt is an example of a ______ material.
Small voltages generated by a conductor with current in an external magnetic field.
The phenomenon by which a magnetic substance becomes a magnet when it is place near a magnet
Electric field intensity is measured in
Paramagnetic substance has a relative permeability of
A magnetic flux of 2.5 x10^4 Wb through an area of 5 x10^4 square meters results in
If the magnetic material is located within a coil through which alternating current (60 Hz frequency)…
Which of the following is a natural magnet?
Bonding of atoms that is due to the force of attraction between positive ions and a group of negative…
Who demonstrated that there are magnetic effects around every current-carrying conductor and that current-carrying…
What type of bond is formed when there exists some form of collective interactions between the (negatively…
What is the SI unit of reluctance?
Which of the following is a paramagnetic material?
The amount of magnetizing force to counter balance the resid magnetic material is referred to as
The emission of electrons from hot bodies is called
Which of the following materials has the least hysteresis loop area?
One that has magnetic poles produced by internal atomic structure with no external current necessary
Hysteresis is a phenomenon of _________ in a magnetic circuit.
Lenz's law is the consequence of the law of conservation of
The B-H curve of ________ is not a straight line.
The magnetic flux through a coil changes. This results to the induced emf acting in a direction as to
Defined as the flux density produced in it due to its own induced magnetism
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