Materials subjected to rapid reversal of magnetism should have
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Electrical Engineering · all questionsMagnetism And Electromagnetism
Magnetism And Electromagnetism
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Hysteresis loop in case of magnetically hard materials is more in shape as compared to magnetically soft materials.
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The relative permeability of materials is not constant.
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A permeable substance is one
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The stray line of magnetic flux is defined as
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When two ends of a circular uniform wire are joined to the terminals of a battery, the field at the center of the circle
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Two long parallel conductors carry 100 A. If the conductors are separated by 20 mm, the force per meter of length of each conductor will be
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The magnetic reluctance of a material
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The left hand rule correlates to
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When a magnet is in motion relative to a coil the induced e.m.f. does not depend upon
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Substances which have permeability less than the permeability of free space are known as
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A square cross-sectional magnet has a pole strength of 1 x 10 Wb and cross sectional area of 20 mm x 20 mm. What is the strength at a distance of 100 mm from the unit pole in air ?
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Paramagnetic materials have relative permeability
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In a simple magnetic field the strength of magnet flux
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For which of the following materials the net magnetic moment should be zero?
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For a given wire-wound core, an increase in current through the coil
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In the left hand rule, forefinger always represents
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The Biotsavart's law is a general modification of
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What will be the current passing through the ring shaped air cored coil when number of turns is 800 and ampere turns are 3200?
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Which of the following type of materials are not very important for engineering applications?
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