EXAMIANS
When the north poles of two bar magnets are brought close together, there will be
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Magnetising steel is normals difficult because
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When the current through the coil of an electromagnet reverses, the
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The materials having low retentivity are suitable for making
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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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Reciprocal of permeability is
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Air gap has_______eluctance as compared to iron or steel path
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When a solenoid is activated, the force that moves the plunger is
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A coil of wire is placed in a changing magnetic field. If the number of turns in the coil is decreased, the voltage induced across the coil will
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The ability of a material to remain magnetized after removal of the magnetizing force is known as
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