The phenomenon by which a magnetic substance becomes a magnet when it is place near a magnet
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Core materials of a good relay have _________ hysteresis loop.
The force between two charges placed a given distance apart ______ as the relative permittivity of the…
Permeance of a magnetic circuit is _________ the cross-sectional area of the circuit.
______ is an electromagnet with its core in the form of a close magnetic ring.
Hysteresis loss can be reduced by one of the following.
What is the value of the absolute permittivity of air?
How many electrons are needed in the valence orbit to give a material's stability?
What is the unit of magnetomotive force?
Who developed the electromagnetic theory of light in 1862?
The magnitude of the induced emf in a coil is directly proportional to the rate of change of flux linkages.…
The ability of a mechanically stressed ferromagnetic wire to recognize rapid switching of magnetization…
Electron is a Greek word for
The permeability of permalloy is
Theory of ferromagnetic phenomena which assumes each atom is a permanent magnet which can turn freely…
Which of the following is a vector quantity?
Hipernik is an alloy containing __________ iron and __________ nickel.
Hydrogen is an example of a _____ material.
The tiniest element of matter
The emission of electrons from hot bodies is called
The ratio between the intensity of magnetization produced in a substance to the magnetizing force producing…
The amount of magnetizing force to counter balance the resid magnetic material is referred to as
Electric lines of force leave or enter the charge surface at an angle of
If you hold the conductor with right hand so that the stretched thumb points in the direction of the…
The magnetic flux through a coil changes. This results to the induced emf acting in a direction as to
The unit of flux density is
What is the reluctance of a magnetic path having a length of 2x 10^-3m and crosssectional area of 2.5…
Electronic current in a wire is the flow of ____________ electrons.
The magnetic energy stored in an inductor is ______ current.
Ohm's law can be used only to a _____ circuit or component.
Flux density is measured in
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