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  1. When a piece of pure silicon is doped with aluminium, then

  2. A.

     The conductivity of the doped silicon piece will remain the same

    B.

     The doped silicon piece will become n-type

    C.

     The doped silicon piece will become p-type

    D.

     The resistivity of the doped silicon piece will increase

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  3. When two semiconductors of p and n-type are brought in contact, they form p-n junction which acts like a/an

  4. A.

     Conductor

    B.

     Oscillator

    C.

     Rectifier

    D.

     Amplifier

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  5. Which one among the following components is used as an amplifying device?

  6. A.

     Transformer

    B.

     Diode

    C.

     Capacitor

    D.

     Transistor

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  7. An integrated circuit is more advantages than a coventional circuit because

  8. A.

     They make the electric equipments more reliable and easier for servicing

    B.

     A faulty part of a conventional circuit may be difficult to locate and repair

    C.

     If a part of the integrated circuit fails the entire circuit is simply replaced

    D.

     All the above

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  9. Which of the following features of a tunnel diode is its drawback?

  10. A.

     Extremely high frequency response

    B.

     Very wide temperature range of operations

    C.

     Instability due to negative resistance

    D.

     Very low power consumptions

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  11. The distance between node and adjacent antinode is 30 cm. The wavelength is

  12. A.

     30 cm.

    B.

     90 cm.

    C.

     120 cm.

    D.

     60 cm.

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  13. The material used in the fabrication of a transistor is

  14. A.

     Aluminium

    B.

     Copper

    C.

     Silicon

    D.

     Silver

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  15. For which Diode is used ?

  16. A.

     Modulation

    B.

     Oscillation

    C.

     Amplification

    D.

     Purification

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  17. The complete form of 'IC' in electronics is

  18. A.

     Internal circuit

    B.

     Independent circuit

    C.

     Integrated circuit

    D.

     Inbuilt circuit

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  19. In electronics what comes under tank circuit ?

  20. A.

     Resistance and capacity

    B.

     Resistance and inductance

    C.

     Capacity and inductance

    D.

     Resistance, capacity and inductance

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