Who developed the electromagnetic theory of light in 1862?
Heinrich Rudolf Hertz
James Clerk Maxwell
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The emf induced in a coil due to the changing current of another neighboring coil is called
Steel is hard to magnetize because of its
Permeance is analogous to
Ohm's law can be used only to a _____ circuit or component.
Cobalt is an example of a ______ material.
What is the SI unit of magnetic flux?
A magnetizing force of 1000 AT/m will produce a flux density of __________ i
The magnitude of the induced emf in a coil is directly proportional to the rate of change of flux linkages.…
The electric potential at a point in air due to a charge is 21 V. If the air is replaced by a medium…
The force of attraction or repulsion between two magnetic poles is inversely proportional to the square…
The magnetic field around the conductor is determined by the
Hipernik is an alloy containing __________ iron and __________ nickel.
How many neutrons does a copper atom have?
Electric field intensity is a ________.
One that has magnetic poles produced by internal atomic structure with no external current necessary
A one cubic cm of copper has how many free electrons at room temperature?
What is used as the dielectric material in high voltage transformers?
The unit of electrical energy is
A good conductor has how many valence electrons?
When the relative permeability of a material is slightly more than 1a it is called ______ material.
A negative ion results when an atom gains an additional
The mass of proton is __________ the mass of an electron.
The magnetic potential in a magnetic circuit can be measured in terms of
The branch of Engineering which deals with the magnetic effect of electric current is known as
Who discovered superconductivity in 1911?
Bonding of atoms that is due to the force of attraction between positive ions and a group of negative…
The diameter of a hydrogen atom is approximately ______ cm.
The B-H curve of ________ is not a straight line.
If the distance between two magnetic poles decreases by 2 timesa the force between them
The contribution to the ionization in an ionization chamber by electrons liberated from t he walls.
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