| 1. | A material is placed in a magnetic field and it is thrown out of it. Then the material is ? | |
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non-magnetic
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ferromagnetic
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diamagnetic
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paramagnetic
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Report Question| 2. | Magnetic field intensity is defined as ? | |
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Magnetic induction force acting on a unit magnetic pole
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Number of lines of force crossing per unit volume
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Number of lines of force crossing per unit area
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Magnetic moment per unit volume
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| 3. | The primary origin of magnetism lies in ? | |
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electronegative nature of materials.
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atomic current and intrinsic spin of electrons.
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pauli exclusion principle.
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polar and non polar nature of molecules.
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| 4. | The universal property among all substances is ? | |
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paramagnetism.
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ferromagnetism.
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diamagnetism.
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all of these.
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| 5. | If the magnetising field on a ferromagnetic material is increased, its permeability. ? | |
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is unaffected
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may be increased or decreased.
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is decreased
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is increased
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| 6. | A magnetic needle is kept in a non-uniform magnetic field. It experiences ? | |
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a force and a torque.
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a torque but not a force.
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a force but not a torque.
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neither a force nor a torque.
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| 7. | In which type of material the magnetic susceptibility does not depend on temperature ? | |
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Ferrite
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Ferromagnetic
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Paramagnetic
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Diamagnetic
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| 8. | The earth behaves as a magnet with magnetic field pointing approximately from the geographic ? | |
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West to East
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East to West
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North to South
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South to North
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| 9. | Two points A and B are situated at a distance x and 2x respectively from the nearer pole of a magnet 2 cm long. The ratio of magnetic field at A and B is ? | |
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1 : 1 approximately
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8 : 1 approximately
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4 : 1 approximately
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4 : 1 exactly
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| 10. | Identify the mismatched pair ? | |
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Bar magnet - Equivalent solenoid
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Soft magnet - Soft iron
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Permanent magnet - Loud speaker
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Hard magnet - Alnico
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