Who demonstrated the theory of electromagnetic induction in 1831?
James Clerk Maxwell
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Hysteresis is a phenomenon of _________ in a magnetic circuit.
The magnetic field of a magnetized iron bar when strongly heated
The resistance of a material is ____________ its area of cross-section.
Whenever a conductor cuts magnetic fluxa an emf is induced in it. This is known as
The air space between poles of magnets
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Lenz's law is the consequence of the law of conservation of
The emf induced in a coil due to the changing current of another neighboring coil is called
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The force acting on a unit n- pole placed at that point is called
Which element has four valence electrons?
Electromotive force in a circuit
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There are how many compounds available in nature?
Residual magnetism refers to the flux densitya which exists in the iron core when the magnetic field…
A law relating between the magnetic and electric susceptibilities and the absolute temperatures which…
A magnetic flux of 2.5 x10^4 Wb through an area of 5 x10^4 square meters results in
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