Subject

Physics

Class

ICSE Class 12

Pre Boards

Practice to excel and get familiar with the paper pattern and the type of questions. Check you answers with answer keys provided.

Sample Papers

Download the PDF Sample Papers Free for off line practice and view the Solutions online.
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 Multiple Choice QuestionsShort Answer Type

11. Which electromagnetic radiation has wavelength greater than that of X rays and smaller than that of visible light?
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12. How did Fresnel construct a biprism in order to study interference of light?
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13. State Brewster’s law of polarisation of light.
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14. A thin convex lens (L1) of focal length 80 cm and a thin concave lens (L2) of focal length f are kept co-axially, 20 cm apart as shown in figure 3 below. When a narrow and parallel beam of light is incident on the convex lens, bean emerging fron the concave lens is also a parallel beam. Find f.

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15. What condition must be satisfied by two thin lenses kept in contact so that they form an achromatic doublet, i.e. a combination free from chromatic aberration ?
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16. Threshold frequency of a certain metal for photo-electric emission is 5x1014Hz. Calculate its work function.
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17. What conclusion was drawn by Rutherford based on Geiger-Marsden’s experiment on scattering of alpha particles?


Conclusion drawn by Rutherford is that an atom has a lot of empty space in it. The whole of the positive charge and nearly entire mass of the atom were concentrated in a tiny central core called nucleus.
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18. Write a balanced nuclear reaction showing emission of a β- particle by 90Th234 (Symbol of daughter nucleus formed in the process is Pa.)
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19.

What is the essential difference between the working of a nuclear reactor and that of a fission bomb?

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20. State one important use of a Zener diode.
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