EXAMIANS
Magnetic circuit with cross sectional area of 20 cm2 is to be operated at 50 Hz from 120 Vrms supply. The number of turns required to active a peak magnetic flux density of 1.8 T in the core flux is
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A coil of 300 turns is wound on a non-magnetic core having a mean circumference of 300 mm and a cross sectional area of 300 mm2. The current of 3 A will be
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The minimum height of outer atmosphere is
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Two identical circular coils, one closed and another is little split (not enclosed) are placed in an uniform magnetic field which decrease at a constant rate. If the plane to the coils are perpendicular to the field which of the following statements is true?
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An electric dipole of moment P is placed in front of a ground sphere. The change induced on the surface of the sphere is (Assume radius of sphere = R and distance from dipole to centre of sphere = d)
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For a linear electromagnetic circuit, which of the following statement is true?
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In order to minimize loss due to hysteresis the magnetic material should have
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The divergence of a vector is a scalar, while the curl of a vector is another
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Coulombs law for the force between electric charges most closely resembles with
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If the static magnetic flux density is B, then
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