Who developed the electromagnetic theory of light in 1862?
Heinrich Rudolf Hertz
James Clerk Maxwell
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Materials whose permeabilities are slightly greater than that of free space
What determines the atomic number of an element?
If the number of valence electrons of an atom is exactly 4a then the substance is called
Whenever a flux inking a coil or current changesa an emf is induced in it. This is known as
Electron is a Greek word for
Electromotive force in a circuit
What bond is formed when one or more electrons in the outermost energy orbit of an atom are transferred…
Permeance of a magnetic circuit is _________ the cross-sectional area of the circuit.
One coulomb of charge consists of ________ electrons.
The physical motion resulting from the forces of magnetic fields is called
The magnetic potential in a magnetic circuit can be measured in terms of
One electron volt (1 eV) is equivalent to _____ joules
The magnetic flux through a wire loop in a magnetic field does not d
An atom or a group of atoms that carries a net electric charge.
When the relative permeability of a material is much greater than 1a it is called _______ material.
What is the diameter of an atom?
Which of the following materials has permeability slightly less than that of free space?
Electric field intensity is a ________.
If you hold the conductor with right hand so that the stretched thumb points in the direction of the…
The reluctance of a magnetic circuit is not dependent on which of the following?
The force between two magnetic poles is _____ the relative permeability of the medium.
The magnetic field of a magnetized iron bar when strongly heated
If the length and area of cross-section of a wire are doubleda then its resistance
Which of the following has the highest permeability?
What is the SI unit of magnetic flux?
If the number of valence electrons of an atom is more than 4a the substance is called
A magnetic flux of 2.5 x10^4 Wb through an area of 5 x10^4 square meters results in
The force which set ups or tends to set up magnetic flux in a magnetic circuit
The branch of Engineering which deals with the magnetic effect of electric current is known as
One of the common application of an air- cored choke.
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