| 1. | In which of the materials the spin moments associated with two sets of atoms are aligned antiparallel to each other ? | |
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Ferromagnetic materials
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Ferrites
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Ferrimagnetic materials
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Antiferromagnetic materials
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Report Question| 2. | What will be the magnetic potential difference across the air gap of 2 cm length in magnetic field of 200 AT/m ? | |
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2AT
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4AT
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6 AT
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10 AT
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| 3. | The direction of magnetic lines of force is ? | |
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from south pole to north pole
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from north pole to south pole
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from one end of the magnet to another
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none of the above
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| 4. | Supermagnetic materials are composed of ? | |
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ferromagnetic particles in ferromagnetic matrix
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non-ferromagnetic particles in paramagnetic matrix
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ferromagnetic particles in a nonferromagnetic matrix
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none of the above
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| 5. | Ferrites are a sub-group of ? | |
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non-magnetic materials
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ferro-magnetic materials
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para magnetic materials
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ferri-magnetic materials
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| 6. | How does the magnetic compass needle behave in a magnetic field ? | |
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It assures a position right angle to magnetic field
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It starts rotating
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It assures a position which follows a line of magnetic flux
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None of the above
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| 7. | The relative permeability is less than unity is case of ? | |
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ferromagnetic materials
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ferrites
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non-ferrous materials
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diamagnetic materials
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| 8. | The ratio of intensity of magnetisation. to the magnetisation force is known as ? | |
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flux density
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susceptibility
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relative permeability
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none of the above
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| 9. | The magnetic reluctance of a material ? | |
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decreases with increasing cross sectional area of material
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increases with increasing cross-sectional area of material
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does not vary with increasing cross sectional area of material
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any of the above
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| 10. | Which of the following type of materials are not very important for engineering applications ? | |
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Ferromagnetic
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Paramagnetic
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Diamagnetic
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None of the above
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