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General Knowledge :: Physics

  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


  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


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

  6. A.

     Transformer

    B.

     Diode

    C.

     Capacitor

    D.

     Transistor


  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


  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


  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.


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

  14. A.

     Aluminium

    B.

     Copper

    C.

     Silicon

    D.

     Silver


  15. For which Diode is used ?

  16. A.

     Modulation

    B.

     Oscillation

    C.

     Amplification

    D.

     Purification


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

  18. A.

     Internal circuit

    B.

     Independent circuit

    C.

     Integrated circuit

    D.

     Inbuilt circuit


  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