This paper does not exhibit electricity because it contains the same number of
protons and electrons
neutrons and electrons
neutrons and positrons
Correct Answer :
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The energy stored in an electrostatic field or electromagnetic field is called
A one cubic cm of copper has how many free electrons at room temperature?
Which of the following is used by temporary magnets as the magnetic material?
Which element has four valence electrons?
The greater percentage of materials is _________.
As the magnetic intensity decreasesa the relative permeability of a magnetic material
What is the measure of the density and sign of the electric charge at a point relative to that at some…
Formed when there exist distant electronic interactions between (opposite) charges present in the neighboring…
What is used as the insulating material or dielectric in an electric ion
An atom or a group of atoms that carries a net electric charge.
It is the reciprocal of reluctance and implies the case of readiness with which magnetic flux is developed.
If the right handed bottle-opener cork screw is assumed to be along the conductor so as to advance in…
What is the unit of magnetomotive force?
Theory of ferromagnetic phenomena which assumes each atom is a permanent magnet which can turn freely…
Who developed the electromagnetic theory of light in 1862?
What determines the value of the temperature coefficient of resistance of a material?
If the number of valence electrons of an atom is more than 4a the substance is called
The amount of magnetizing force to counter balance the resid magnetic material is referred to as
What is the cgs unit of magnetomotive force?
The electric flux density is a ________ quantity.
Bonding of atoms that is due to the force of attraction between positive ions and a group of negative…
Which of the following materials has the least hysteresis loop area?
One farad equals
One oersted (Oe) is equivalent to _____ Gb/cm.
The force acting on a unit n- pole placed at that point is called
Residual magnetism refers to the flux densitya which exists in the iron core when the magnetic field…
Which of the following is a diamagnetic material?
What is the value of the absolute permittivity of air?
A good conductor has how many valence electrons?
Hysteresis is a phenomenon of _________ in a magnetic circuit.
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