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The customary energy unit in atomic and nuclear physics is
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What is the diameter of an atom?
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The ability of a mechanically stressed ferromagnetic wire to recognize rapid switching of magnetization when subjected to a dc magnetic field.
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Paramagnetic substance has a relative permeability of
A. Slightly less than one
D. Very much greater than one
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The physical motion resulting from the forces of magnetic fields is called
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The magnetic potential in a magnetic circuit can be measured in terms of
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Defined as the number of lines per unit area through any substance in a plane at right angles to the lines of force
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Electric potential is a _______ quantity.
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Gases whose particles are charged are known as
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As the magnetic intensity decreasesa the relative permeability of a magnetic material
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One ampere- turn is equivalent to _____ gilberts
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Magnetic field intensity is a ________ quantity.
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The B-H curve for ________ is a straight line passing through the origin.
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If the value of 25 of a conductor is 1/230 per oCa then the value of 0is
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The electric field intensity between the parallel plate air capacitor is 20 N/C. If an insulating slab of relative permittivity 5 is placed between the platesa then electric field intensity will be
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The ratio of the total flux (flux in iron path) to the useful flux (flux in air gap)
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A negatively charge body has
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Who discovered superconductivity in 1911?
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The ability of a material to conduct magnetic flux through it.
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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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If two similar charges 1 coulomb each are placed 1 m apart in aira then the force of repulsion is
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Which of the following is a paramagnetic material?
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The amount of magnetizing force to counter balance the resid magnetic material is referred to as
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What is the value of the absolute permittivity of air?
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An effect which is generally used in the gausameter to measure flux density.
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The emf induced in a coil due to the changing current of another neighboring coil is called
C. Statically induced emf
D. Dynamically induced emf
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The magnetic field around the conductor is determined by the
C. Current divided by the resistance
D. Resistance divided by the current
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Ohm's law cannot be applied to which material?
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What is the SI unit of reluctance?
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What type of bond is formed when there exists some form of collective interactions between the (negatively charged) electrons and (positively charged) nuclei in a solid?