The energy stored in an electrostatic field or electromagnetic field is called
R est energy
Correct Answer :
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The unit of flux is _____ in cgs system.
The ability of a material to conduct magnetic flux through it.
The contribution to the ionization in an ionization chamber by electrons liberated from t he walls.
The mass of proton is __________ the mass of an electron.
Used to maintain strength of magnetic field
The magnetic flux through a wire loop in a magnetic field does not d
A current if flowing east along a power line. If the earth's field is neglecteda the direction of the…
Three charges of +5 Ca -6 C and +9 C are placed inside a sphere. What is the total flux passing through…
Hydrogen is an example of a _____ material.
A magnetic circuit carries a flux iin the iron part and a fluxgin the air gap. What is the leakage coefficient?
The temperature coefficient of resistance of conductors is
Which of the following is a vector quantity?
Who developed the electromagnetic theory of light in 1862?
Who discovered superconductivity in 1911?
The quantity of magnetism retained by a magnetic material after withdrawal of the magnetizing force…
What is the main advantage of temporary magnets?
What is the usual value of leakage coefficient for electrical machines?
A magnetic material losses its ferromagnetic properties at a point called
One coulomb of charge consists of ________ electrons.
What is the SI unit of specific resistance or resistivity?
Theory of ferromagnetic phenomena which assumes each atom is a permanent magnet which can turn freely…
A good conductor has how many valence electrons?
What is the typical saturation flux density for most magnetic materials?
The tiniest element of matter
A test charge means a charge of
How many turns are needed to produce a magnetomotive force of 1000 A.t for a coil with 6 amperes?
If a 20 V potential is applied across a relay coil with 50 turns having 1 ? of resistancea the total…
A t/m is a unit of
Referred to as the specific reluctance of a material
When a conductor is stationary and the magnetic field is moving or changing the emf induced is called
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