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12th Standard Physics English Medium Recent developments in Physics Reduced Syllabus Important Questions 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 materials used in Robotics are

    (a)

    Aluminium and silver

    (b)

    Silver and gold

    (c)

    Copper and gold

    (d)

    Steel and aluminum

  4. 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

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

    (a)

    Precision medicine

    (b)

    Wireless brain sensor

    (c)

    Virtual reality

    (d)

    Radiology

  6. The gravitational waves were theoretically proposed by

    (a)

    Conrad Rontgen

    (b)

    Marie Curie

    (c)

    Albert Einstein

    (d)

    Edward Purcell

  7. 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

  8. __________ 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

  9. _______ is synthesized top down approach

    (a)

    Ball milling

    (b)

    Plasma etching

    (c)

    lithography

    (d)

    Ball milling and lithography

  10. Best example for applications. of nano technology

    (a)

    Chemical industry

    (b)

    Engineering

    (c)

    medicine

    (d)

    all of these

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

    (a)

    Unimate

    (b)

    Robotics

    (c)

    Motors

    (d)

    Generators

  12. Muscle wires can contract by _________ when electric current is passed through them

    (a)

    5%

    (b)

    7%

    (c)

    25%

    (d)

    50%

  13. Chinese scientists have created the world's first autonomous _________ to combat caner tumours.

    (a)

    RNA Robot

    (b)

    DNA Robot

    (c)

    m RNA Robot

    (d)

    r RNA Robot

  14. Zno is an example of __________

    (a)

    Bulk solid

    (b)

    Nano solid

    (c)

    Bulk solid and Nano solid

    (d)

    None of the above

  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. Give any two examples for "Nano" in nature.

  19. Mention any two advantages and disadvantages of Robotics.

  20. What are black holes?

  21. What is nanotechnology?

  22. How does the manipulation of colours obtain in nanoscale structure?

  23. Who invented Unimate?

  24. What is Cosmology?

  25. What is the use of industrial robots?

  26. Define nano solid.

  27. 3 Marks
    10 x 3 = 30
  28. Discuss the applications of Nanomaterials in various fields

  29. What are the possible harmful effects of usage of Nanoparticles? Why?

  30. Discuss the functions of key components in Robots?

  31. Elaborate any two types of Robots with relevant examples

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

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

  34. What is particle physics?

  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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