The straight line passing through the two poles of magnet is called
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Paramagnetic substance has a relative permeability of
Permanent magnets can be found in
An atom or a group of atoms that carries a net electric charge.
A magnetic material losses its ferromagnetic properties at a point called
At/m is a unit of
The reluctance of the magnetic circuit is ________ relative permeability of the material comprising…
What is another name for relative permittivity?
One that has magnetic poles produced by internal atomic structure with no external current necessary
The temperature coefficient of resistance of a conductor ______ with an increase in temperature.
The energy stored in an electrostatic field or electromagnetic field is called
Which of the following magnetic materials can be easily magnetized in both direction?
The reluctance of a magnetic circuit varies with
What is the main advantage of temporary magnets?
The magnetic energy stored in an inductor is ______ current.
A current if flowing east along a power line. If the earth's field is neglecteda the direction of the…
The branch of Engineering which deals with the magnetic effect of electric current is known as
What bond is formed when electrons in the outermost energy orbits of the atoms are shared between two…
Flux density is measured in
Used to maintain strength of magnetic field
The permittivity of a material is given by one of the following formulas.
An electron- volt (eV) is a unit of
The magnitude of the induced emf in a coil is directly proportional to the rate of change of flux linkages.…
Three charges of +5 Ca -6 C and +9 C are placed inside a sphere. What is the total flux passing through…
Refers to the magnetic lines
Whenever a flux inking a coil or current changesa an emf is induced in it. This is known as
Which of the following has the highest permeability?
If the relative permittivity of a material is 10a then its permittivity is
How many neutrons does a copper atom have?
The direction of force o a current carrying conductor placed in a m found by
Who discovered superconductivity in 1911?
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