Related Questions
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Magnetic field intensity is a ________ quantity.
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When a wire loop is rotated in a magnetic field the direction of the induced emf changes one in every _______ revolution
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Core materials of a good relay have _________ hysteresis loop.
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The temperature coefficient of resistance of eureka is
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What is the SI unit of magnetic flux?
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The permittivity of a material is given by one of the following formulas.
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Permeability means
A. The conductivity of the material for magnetic lines of force
B. The magnetization test in the material after exciting field has been removed
C. The strength of an electromagnet
D. The strength of the permanent magnet
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Refers to the non- metallic materials that have the ferromagnetic properties of iron.
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One that has magnetic poles produced by internal atomic structure with no external current necessary
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The temperature coefficient of resistance of insulators is
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What is the diameter of an atom?
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Who demonstrated that there are magnetic effects around every current-carrying conductor and that current-carrying conductors can attract and repel each other just like magnets?
B. Hans Christian Oersted
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The force which set ups or tends to set up magnetic flux in a magnetic circuit
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A magnetizing force of 1000 AT/m will produce a flux density of __________ i
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Whenever a conductor cuts magnetic fluxa an emf is induced in it. This is known as
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One oersted (Oe) is equivalent to _____ Gb/cm.
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Hydrogen is an example of a _____ material.
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Formed when there exist distant electronic interactions between (opposite) charges present in the neighboring atoms or molecules.
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A theorem which states that an electric current flowing in a circuit produces a magnetic field at external points equivalent to that due to a magnetic shell whose bounding edge is the conductor and whose strength of the current.
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The K shell or the first shell has how many permissible number of orbiting electrons?
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A magnetic circuit carries a flux iin the iron part and a fluxgin the air gap. What is the leakage coefficient?
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Materials whose permeabilities are slightly greater than that of free space
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What is the reluctance of a magnetic path having a length of 2x 10^-3m and crosssectional area of 2.5 x 10^-3 m^2?
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The force acting on a pole of 5 Wb is 25 N. What is the intensity of the magnetic field?
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A good conductor has how many valence electrons?
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Calculate the flux density that will be produced by the field intensity of 2000 a. t/m for a permeability of 126 x 10^-6 T/A.t/m
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If the number of valence electrons of an atom is less than 4a the substance is called
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Bonding of atoms that is due to the force of attraction between positive ions and a group of negative ions
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The mass of proton is __________ the mass of an electron.
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If the number of valence electrons of an atom is more than 4a the substance is called