Hydrogen is an example of a _____ material.
N on- magnetic
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The straight line passing through the two poles of magnet is called
An atom or a group of atoms that carries a net electric charge.
What is the reluctance of a magnetic path having a length of 2x 10^-3m and crosssectional area of 2.5…
Steel is hard to magnetize because of its
The ability of a material to conduct magnetic flux through it.
The force between two magnetic poles is _______ their pole strengths.
If the distance between two magnetic poles decreases by 2 timesa the force between them
The magnetic materials should have a large hysteresis loss for one of the following applications.
Temporary magnets are commonly employed in
Which element has four valence electrons?
A law establishing the fact that the algebraic su of the rises and drops of the mmf around a closed…
How is mutual inductance between two coils decreased?
If the number of valence electrons of an atom is more than 4a the substance is called
The force of attraction or repulsion between two magnetic poles is directly proportional to their strengths.
The flux density in an air-cored coil is 10^-3 Wb/m^2. With a cast iron core of relative permeability…
What is the SI unit of specific resistance or resistivity?
A law that states that the polarity of the induced voltage will oppose the change in magnetic flux causing…
The force between two magnetic poles is _____ the relative permeability of the medium.
The electrons in the last orbit of an atom are called _______ electrons.
How many electrons are needed in the valence orbit to give a material's stability?
The customary energy unit in atomic and nuclear physics is
The hot resistance of an incandescent lamp is about _______ its cold resistance.
What is the value of the absolute permittivity of air?
Paramagnetic substance has a relative permeability of
Magnetic field intensity is a ________ quantity.
Electric lines of force leave or enter the charge surface at an angle of
Who developed the electromagnetic theory of light in 1862?
The magnetic field of a bar magnet most closely resembles the magnetic field of
Used to maintain strength of magnetic field
The B-H curve of ________ is not a straight line.
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