Related Questions
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The quantity 10^6 maxwells is equivalent to one
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A negative ion results when an atom gains an additional
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When the relative permeability of a material is slightly more than 1a it is called ______ material.
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A commercial alloy of aluminum nickela and iron with cobalta copper and titanium added to produce about 12 grades.
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Who discovered the most important electrical effects which is the magnetic effect?
A. Hans Christian Oersted
B. Sir Charles Wheatstone
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Materials that have very high permeabilities (hundreds and even thousands times of that of free space)
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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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Which of the following is a natural magnet?
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As the magnetic intensity decreasesa the relative permeability of a magnetic material
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Which of the following is used by permanent magnets as the magnetic material?
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The K shell or the first shell has how many permissible number of orbiting electrons?
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Which of the following has the highest permeability?
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Ohm's law can be used only to a _____ circuit or component.
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The process by which an emf and hence current is generated or induced in a conductor when there is a change in the magnetic flux linking the conductor is called
A. Electromagnetic induction
D. Electromagnetic interference
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What is the unit of reluctance?
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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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The force of attraction or repulsion between two magnetic poles is inversely proportional to the square of the distance between them. This is known as
B. Faraday's first law of electromagnetic induction
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When the relative permeability of a material is slightly less than 1a it is called _____ material.
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What bond is formed when electrons in the outermost energy orbits of the atoms are shared between two or more electrons?
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Electric potential is a _______ quantity.
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Who discovereda the relationship between magnetism and electricity that serves as the foundation for the theory of electromagnetism?
B. Hans Christian Oersted
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The simplest type of atom to exist is the ______ atom.
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The force between two magnetic poles is _____ their poles strength.
B. directly proportional to
C. inversely proportional to
D. directly proportional to the square root of
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A one cubic cm of copper has how many free electrons at room temperature?
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A law establishing the fact that the algebraic su of the rises and drops of the mmf around a closed loop of a magnetic circuit is equal to zero.
A. Kirchhoff's circuital law
B. Maxwell's circuital law
C. Ampere's circuital law
D. Coulomb's circuital law
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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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There are how many compounds available in nature?
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Why is it that the magnitude of magnetomotive force required for air gap is much greater than that required for iron part of a magnetic circuit?
B. Because air has the highest relative permeability
C. Because air is a conductor of magnetic flux
D. Because air has the lowest relative permeability
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The magnetic field inside a solenoid
C. increases with distance from the axis
D. decreases with distance from the axis
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A negatively charge body has