Related Questions
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Magnetic effects of the earth as a huge magnet with north and south poles.
D. Terrestrial ferromagnetism
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The evaporation of electrons from a heated surface is called
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How many electrons are needed in the valence orbit to give a material's stability?
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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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As the magnetic intensity decreasesa the relative permeability of a magnetic material
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All magnetic field originates from
A. moving electric charge
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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 law that states that the polarity of the induced voltage will oppose the change in magnetic flux causing the induction.
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The ability of a material to conduct magnetic flux through it.
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Permanent magnets can be found in
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The branch of Engineering which deals with the magnetic effect of electric current is known as
C. Electrical engineering
D. Electronics engineering
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Three charges of +5 Ca -6 C and +9 C are placed inside a sphere. What is the total flux passing through the surface of sphere?
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The idea of preventing one component from affecting another through their common electric and magnetic field is referred to as
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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 factor used to correct for the electrostatic forces of the more distant ions in an ionic solid.
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Electromotive force in a circuit
A. causes free electrons to flow
B. increases the circuit resistance
C. maintains circuit resistance
D. is needed to make the circuit complete
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Hysteresis refers to the ______ between flux density of the material and the magnetizing force applied.
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A good conductor has how many valence electrons?
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Steel is hard to magnetize because of its
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A substance that attracts pieces iron
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Which of the following has the highest permeability?
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If the value of 25 a conductor is 1/255 per oCa then the value of 20is
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A 200-watt lamp working for 24 hours will consume approximately _____ units.
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The quantity 10^6 maxwells is equivalent to one
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How much is the flux in Weber in the above problem?
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Electrons at the outer shell are called
C. Semiconductor electrons
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If two similar charges 1 coulomb each are placed 1 m apart in aira then the force of repulsion is
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What is the value of the absolute permittivity of air?
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The permeability of a material having a flux density of 5 Wb/m^2 is 10^-5 H/m. What is the value of magnetizing force?
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What is the SI unit of reluctance?