Home / General Knowledge / Physics :: section-21

General Knowledge :: Physics

  1. What is the range of Strong Nuclear force?

  2. A.

     Infinite

    B.

     Very short Subnuclear size

    C.

     Very short Nuclear size

    D.

     None

    View Answer

    Workspace

    Discuss Discuss in Forum


  3. Name the process of production of energy in the Sun

  4. A.

     Nuclear fission

    B.

     Radioactivity

    C.

     Nuclear fusion

    D.

     Ionization

    View Answer

    Workspace

    Discuss Discuss in Forum


  5. Which type of reaction produces the most harmful radiation ?

  6. A.

     Fusion reaction

    B.

     Fission reaction

    C.

     Chemical reaction

    D.

     Photo-Chemical reaction

    View Answer

    Workspace

    Discuss Discuss in Forum


  7. Energy is continuously created in the sun due to:

  8. A.

     Nuclear fusion

    B.

     Nuclear fission

    C.

     Radioactivity

    D.

     Artificial radioactivity

    View Answer

    Workspace

    Discuss Discuss in Forum


  9. The mass defect is the result of what action occurring?

  10. A.

     Mass being converted to energy when protons and neutrons bind together in a nucleus

    B.

     Protons and electrons being attracted to each other

    C.

     Energy being converted into moles of atoms when neutrons break apart protons

    D.

     Mass being converted to energy when protons and neutrons break apart in a nucleus

    View Answer

    Workspace

    Discuss Discuss in Forum


  11. Which one of the following wavelengths of light is most effective in photosynthesis ?

  12. A.

     Blue

    B.

     Green

    C.

     Orange

    D.

     Yellow

    View Answer

    Workspace

    Discuss Discuss in Forum


  13. The optical phenomenon that is primarily responsible for the observation of rainbow on a rainy day is

  14. A.

     Diffraction

    B.

     Interference

    C.

     Dispersion

    D.

     Reflection

    View Answer

    Workspace

    Discuss Discuss in Forum


  15. An electron microscope gives higher magnification than an optical microscope, because :

  16. A.

     It uses more powerful lenses

    B.

     The velocity of electron is smaller than that of visible light

    C.

     The electrons have more energy than the light particles

    D.

     The wavelength of electrons is smaller as compared to the wavelength of visible light

    View Answer

    Workspace

    Discuss Discuss in Forum


  17. The magnifying power of an astronomical telescope can be decreased by

  18. A.

     Decreasing the focal length of the eyepiece

    B.

     Increasing the focal length of the eyepiece

    C.

     Increasing the focal length of the objective

    D.

     None of these

    View Answer

    Workspace

    Discuss Discuss in Forum


  19. The light rays used for eliminating bacteria is

  20. A.

     X-rays

    B.

     Infrared rays

    C.

     Microwave radiation

    D.

     Ultra-violet radiation

    View Answer

    Workspace

    Discuss Discuss in Forum