| 1. | The main constituent of permalloy is ? | |
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cobalt
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chromium
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nickel
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tungsten
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Report Question| 2. | Tesla is a unit of ? | |
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field strength
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inductance
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flux density
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flux
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| 3. | The unit of relative permeability is ? | |
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henry/metre
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henry
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henry/sq. m
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it is dimensionless
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| 4. | Which of the following is expected to have the maximum permeability ? | |
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Brass
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Copper
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Zinc
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Ebonite
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| 5. | Paramagnetic materials have relative permeability ? | |
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slightly less than unity
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equal to unity
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slightly more than unity
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equal to that ferromagnetic materials
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| 6. | Aluminium and platinum are materials ? | |
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ferromagnetic
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diamagnetic
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paramagnetic
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insulating
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| 7. | One telsa is equal to ? | |
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1 Wb/mm²
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1 Wb/m
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1 Wb/m²
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1 mWb/m²
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| 8. | A magnet does not attract ? | |
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cobalt
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nickel
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copper
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iron
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| 9. | which of the fallowing is a vector quantity ? | |
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Relative permeability
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Magnetic field intensity
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Flux density
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Magnetic potential
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| 10. | The materials having low retentivity are suitable for making ? | |
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weak magnets
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temporary magnets
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permanent magnets
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none of the above
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