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  1. Magnetism in materials is due to

    2. A.

     Electrons at rest
    B.

     Circular motion of electrons
    C.

     Protons at rest
    D.

     All neutrons at rest

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  2. The method of magnetisation is:

    3. A.

     Hammering a magnet
    B.

     Heating a magnet
    C.

     Passing direct current through it
    D.

     Passing alternating current through it

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  3. Magnetic keepers are pieces of

    4. A.

     Nickel
    B.

     Cobalt
    C.

     Steel
    D.

     Soft iron

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  4. Curie point is the temperature at which

    5. A.

     Matter becomes radioactive
    B.

     A metal loses magnetic properties.
    C.

     A metal loses conductivity
    D.

     Transmutation of metal occurs.

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  5. Tesla is a unit of magnetic :

    6. A.

     Flux
    B.

     Induction
    C.

     Moment
    D.

     Field

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  6. The domain theory of magnetism applies to

    7. A.

     Aluminium
    B.

     Copper
    C.

     Silver
    D.

     Cobalt

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  7. The paramagnetic theory of magnetism applies to

    8. A.

     Nickel
    B.

     Mercury
    C.

     Iron
    D.

     Platinum

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  8. Where should a boat compass be mounted?

    9. A.

     Near magnet
    B.

     Near iron
    C.

     Away from electrical wiring
    D.

     All the above

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  9. Which of the following properties is found only in ferromagnetic materials ?

    10. A.

     Susceptibility independent of temperature
    B.

     Point in a particular direction
    C.

     Hysteresis
    D.

     Attracting a magnetic substance

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  10. Magnetic field lines about a current-carrying wire

    11. A.

     Circle the wire in closed loops
    B.

     Extend radially from the wire
    C.

     Both of these
    D.

     None of the above

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