Related Questions
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The force acting on a unit n- pole placed at that point is called
A. Magnetic field intensity
B. Electric field intensity
C. Electromagnetic field intensity
D. Intensity magnetization
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Whenever a flux inking a coil or current changesa an emf is induced in it. This is known as
C. Faraday's first law of electromagnetic induction
D. Faraday's second law of electromagnetic induction
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All magnetic field originates from
A. moving electric charge
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Who demonstrated the theory of electromagnetic induction in 1831?
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Electric field intensity at a point due to a given charge ______ if the relative permittivity of the medium decreases.
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Hysteresis refers to the ______ between flux density of the material and the magnetizing force applied.
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The net electrical charge in an isolated system remains constant. This is known as
A. Law of conservation of charge
D. Law of conservation of energy
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The simplest type of atom to exist is the ______ atom.
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If the number of valence electrons of an atom is more than 4a the substance is called
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A law relating between the magnetic and electric susceptibilities and the absolute temperatures which is followed b ferromagnetsa antiferromagnetsa non-polar ferroelectricsa antiferroelectrics and some paramagnets.
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Which of the following is a natural magnet?
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Two similar polesa each 1Wba placed 1 m apart in air will experience a repulsive force of
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Gases whose particles are charged are known as
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When the relative permeability of a material is slightly less than 1a it is called _____ material.
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The quantity of magnetism retained by a magnetic material after withdrawal of the magnetizing force is called
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The property of magnetic materials of retaining magnetism after withdrawal of the magnetizing force is known as
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The dielectric constant of most materials lies between
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A test charge means a charge of
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The greater percentage of materials is _________.
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If the value of 0 a conductor is 1/234 per oCa then the value of 18is
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The phenomenon that when an electric current passes through an anisotropic crystala there is an absorption or liberation of heat due to the non-uniformity in current distribution.
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The conduction of electricity across the surface of a dielectric is called
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All matters (gasa liquid and solid) are composed of
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The B-H curve for ________ is a straight line passing through the origin.
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The electrons in the last orbit of an atom are called _______ electrons.
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One oersted (Oe) is equivalent to _____ Gb/cm.
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Flux linkages equals
A. Flux times area of core
B. Flux times number of turns times area of core
C. Flux times number of turns times length of core
D. Flux times number of turns
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What is the cgs unit of magnetomotive force?
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What is the main advantage of temporary magnets?
A. The magnetic flux can be changed.
B. Hysteresis can be decreased.
C. Magnetic materials can be used.
D. Abundance of ferromagnetic material that can be temporarily magnetized.
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A principle that states that only two electrons with different spins are allowed to exist in a given orbit
B. Pauli exclusion principle