How many turns are needed to produce a magnetomotive force of 1000 A.t for a coil with 6 amperes?
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What is the SI unit of magnetic flux?
Magnetic intensity is a
The magnetic field of a bar magnet most closely resembles the magnetic field of
The quantity 10^6 maxwells is equivalent to one
The quantity of magnetism retained by a magnetic material after withdrawal of the magnetizing force…
An effect which is generally used in the gausameter to measure flux density.
When the relative permeability of a material is slightly more than 1a it is called ______ material.
The flux density in an air-cored coil is 10^-3 Wb/m^2. With a cast iron core of relative permeability…
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Core materials of a good relay have _________ hysteresis loop.
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A negative ion results when an atom gains an additional
What is the SI unit of reluctance?
A principle that states that only two electrons with different spins are allowed to exist in a given…
Flux linkages equals
A commercial alloy of aluminum nickela and iron with cobalta copper and titanium added to produce about…
The core of a transformer heats up when its primary is fed from an ac source because of
Define as that pole which when placed in air from a similar and equal pole repels it with a force of…
Which of the following is a natural magnet?
The electrons in the last orbit of an atom are called _______ electrons.
A current if flowing east along a power line. If the earth's field is neglecteda the direction of the…
Whenever a conductor cuts magnetic fluxa an emf is induced in it. This is known as
If the value of 0 a conductor is 1/234 per oCa then the value of 18is
The force of attraction or repulsion between two magnetic poles is directly proportional to their strengths.
The reluctance of a magnetic circuit is not dependent on which of the following?
Which of the following magnetic materials can be easily magnetized in both direction?
A magnetic material losses its ferromagnetic properties at a point called
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Amorphous solid is also called
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