Related Questions
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Calculate the permeability (in T/A. t/m) of a magnetic material that has a relative permeability of 300
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When the relative permeability of a material is slightly more than 1a it is called ______ material.
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How many electrons are needed in the valence orbit to give a material's stability?
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Which of the following magnetic materials can be easily magnetized in both direction?
A. Soft magnetic materials
B. Hard magnetic materials
C. High hysteresis loss materials
D. Low hysteresis loss materials
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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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One electron volt (1 eV) is equivalent to _____ joules
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An electron- volt (eV) is a unit of
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Which of the following materials has the least hysteresis loop area?
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The induced emf in a wire loop that is moved parallel to a uniform magnetic field is
B. Dependent on the area of the loop
C. Dependent on the shape of the loop
D. Dependent on the magnitude of the field
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The electric flux density is a ________ quantity.
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If the magnetic material is located within a coil through which alternating current (60 Hz frequency) flowsa then __________ hysteresis loops will be formed
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The permeability of permalloy is
A. Very much greater than permeability of air
B. Slightly greater than permeability of air
C. Slightly less than permeability of air
D. Equal to the permeability of air
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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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Flux density is measured in
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The electric potential at a point in air due to a charge is 21 V. If the air is replaced by a medium of relative permittivity of 3a then electric potential at that point will be
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What is the unit of reluctance?
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Materials whose permeabilities are slightly greater than that of free space
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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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Refers to the non- metallic materials that have the ferromagnetic properties of iron.
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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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The unit of electrical energy is
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This paper does not exhibit electricity because it contains the same number of
B. neutrons and electrons
C. neutrons and positrons
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The electrons in the last orbit of an atom are called _______ electrons.
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What is the other name for dielectric strength?
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Permeance of a magnetic circuit is _________ the cross-sectional area of the circuit.
A. directly proportional to
B. inversely proportional to
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Steel is hard to magnetize because of its
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What is the diameter of an atom?
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The temperature coefficient of resistance of insulators is
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The physical motion resulting from the forces of magnetic fields is called
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The lagging effect between flux density of the material and the magne