| 1. | Which part of the magnetic path requires largest m.m.f. ? | |
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Air gap
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Coil
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Inductance
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Core
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Report Question| 2. | Reciprocal of permeability is ? | |
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reluctivity
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susceptibility
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permittivity
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conductance
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| 3. | When two ends of a circular uniform wire are joined to the terminals of a battery, the field at the centre of the circle ? | |
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will be zero
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will be infinite
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will depend on the amount of e.m.f. applied
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will depend on the radius of the circle
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| 4. | Magnetising steel is normals difficult because ? | |
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it corrodes easily
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it has high permeability
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it has high specific gravity
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it has low permeability
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| 5. | Magnetising steel is normals difficult because ? | |
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it corrodes easily
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it has high permeability
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it has high specific gravity
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it has low permeability
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| 6. | Degaussing is the process of ? | |
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removal of magnetic impurities
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removing gases from the materials
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remagnetising metallic parts
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demagnetising metallic parts
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| 7. | The tubes of force within the magnetic material are known as ? | |
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electric flux
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lines of force
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tubes of induction
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none of the above
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| 8. | A material which is slightly repelled by a magnetic field is known as ? | |
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ferromagnetic material
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diamagnetic material
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paramagnetic material
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conducting material
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| 9. | The force between two long parallel conductors is inversely proportional to ? | |
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radius of conductors
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current in one conductor
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product of current in two conductors
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distance between the conductors
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| 10. | In the left hand rule, forefinger always represents ? | |
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voltage
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current
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magnetic field
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direction of force on the conductor
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