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  1. Tape recorder should not be kept near one of the following things :

  2. A.

     Clock

    B.

     Magnet

    C.

     Electrical switchboard

    D.

     Radio

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  3. Eddy current is generated by

  4. A.

     Conduction

    B.

     Induction

    C.

     Convection

    D.

     Direct Current

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  5. Which of the following circuit elements is used to ''block" DC in an electronic circuit ?

  6. A.

     Resistances

    B.

     Capacitance

    C.

     Inductance

    D.

     Diode

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  7. A photostat machine works on

  8. A.

     Electromagnetic image making

    B.

     Electrostatic image making

    C.

     Magnetic image making

    D.

     Thermal image making

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  9. On which of the following techniques photostate machine works ?

  10. A.

     Magnetic Image—Making

    B.

     Thermal Image—Making

    C.

     Electrostatic Image—Making

    D.

     Electromagnetic Image— Making

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  11. Which of the following group of elements are diamagnetic?

  12. A.

     Argon, copper, silver

    B.

     Hydrogen, argon, copper

    C.

     Oxygen, copper, silver

    D.

     Hydrogen, oxygen, Argon

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  13. At the Curie temperature, the ferromagnetic materials get converted into

  14. A.

     Diamagnetic materials

    B.

     Non-magnetic materials

    C.

     Paramagnetic materials

    D.

     None of the others

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  15. In the process of magnetisation of a bar

  16. A.

     The entire bulk of the bar gets magnetised

    B.

     Only the surface of the bar gets magnetised

    C.

     Only the ends of the bar get magnetised

    D.

     Only some parts of the outer layers of the bar get magnetised

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  17. Magnetic domains normally occur in

  18. A.

     Copper

    B.

     Silver

    C.

     Iron

    D.

     All of the above

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  19. A small piece of a substance is weakly attracted by a strong magnetic field. The substance is

  20. A.

     Diamagnetic

    B.

     Ferromagnetic

    C.

     Paramagnetic

    D.

     Non-magnetic

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