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12th Standard Physics English Medium Recent developments in Physics Reduced Syllabus Important Questions With Answer Key 2021

12th Standard

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Physics

Time : 01:00:00 Hrs
Total Marks : 70
    Multiple Choice Questions
    15 x 1 = 15
  1. The particle size of ZnO material is 30 nm. Based on the dimension it is classified as

    (a)

    Bulk material

    (b)

    Nanomaterial

    (c)

    Soft material

    (d)

    Magnetic material

  2. The blue print for making ultra durable synthetic material is mimicked from

    (a)

    Lotus leaf

    (b)

    Morpho butterfly

    (c)

    Parrot fish

    (d)

    Peacock feather

  3. The alloys used for muscle wires in Robots are

    (a)

    Shape memory alloys

    (b)

    Gold copper alloys

    (c)

    Gold silver alloys

    (d)

    Two dimensional alloys

  4. The technology used for stopping the brain from processing pain is

    (a)

    Precision medicine

    (b)

    Wireless brain sensor

    (c)

    Virtual reality

    (d)

    Radiology

  5. The particle which gives mass to protons and neutrons are

    (a)

    Higgs particle

    (b)

    Einstein particle

    (c)

    Nanoparticle

    (d)

    Bulk particle

  6. Nanoscience is the science of object with typical sizes of ___________

    (a)

    1 - 100 μ

    (b)

    1 - 100 nm

    (c)

    1 - 100 cm

    (d)

    1- 100 m

  7. __________ Scanning Electron Micrograph (SEM) showing the nano structures on the surface of a leaf from a lotus plant

    (a)

    Parrot fish

    (b)

    Morpho butterfly

    (c)

    Lotus leaf surface

    (d)

    Peacock feathers

  8. _______ is synthesized top down approach

    (a)

    Ball milling

    (b)

    Plasma etching

    (c)

    lithography

    (d)

    Ball milling and lithography

  9. Best example for applications. of nano technology

    (a)

    Chemical industry

    (b)

    Engineering

    (c)

    medicine

    (d)

    all of these

  10. George Devol invented the first digitally operated programmable robot called

    (a)

    Unimate

    (b)

    Robotics

    (c)

    Motors

    (d)

    Generators

  11. The size of the Nano robots is reduced to ________ level to perform a task in very small space.

    (a)

    Macroscopic

    (b)

    Robots DNA

    (c)

    Microscopic

    (d)

    Bacteria

  12. In __________ it was established that atoms are made up of electrons, protons and neutrons

    (a)

    1945

    (b)

    1923

    (c)

    1930

    (d)

    1927

  13. Zno is an example of __________

    (a)

    Bulk solid

    (b)

    Nano solid

    (c)

    Bulk solid and Nano solid

    (d)

    None of the above

  14. A single strand of DNA, the building block of all living things, is about _________ nanometers wide.

    (a)

    Two

    (b)

    Three

    (c)

    Four

    (d)

    Five

  15. Plasma etching and chemical vapour deposition are synthesized by ____________

    (a)

    Bottom - up approach

    (b)

    Top - down approach

    (c)

    Bottom - down approach

    (d)

    Top - up approach

  16. 2 Marks
    10 x 2 = 20
  17. What is the difference between Nano materials and Bulk materials?

  18. Mention any two advantages and disadvantages of Robotics.

  19. What are sub atomic particles?

  20. How does the peacock feathers get colouration?

  21. What is the use of nano paints?

  22. Who invented Unimate?

  23. What are the material used to make robots?

  24. What is the use of household robots?

  25. Define nano solid.

  26. What is the two ways of preparing nano particle?

  27. 3 Marks
    10 x 3 = 30
  28. What are the possible harmful effects of usage of Nanoparticles? Why?

  29. Discuss the functions of key components in Robots?

  30. Elaborate any two types of Robots with relevant examples

  31. Comment on the recent advancement in medical diagnosis and therapy.

  32. Write the application of nano robots in medical field?

  33. What is particle physics?

  34. Write the two ways of preparing the nano materials

  35. Write the aim of artificial intelligence in robots.

  36. What is robotics?

  37. Write a note on Gravitational waves

  38. 5 Marks
    1 x 5 = 5
  39. Write the advantages .and disadvantages of robotic

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