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12st Standard Physics Recent Developments in Physics English Medium Free Online Test One Mark questions 2020 - 2021

12th Standard EM

    Reg.No. :
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Physics

Time : 00:10:00 Hrs
Total Marks : 10
    Answer all the questions
    10 x 1 = 10
  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 particle which gives mass to protons and neutrons are

    (a)

    Higgs particle

    (b)

    Einstein particle

    (c)

    Nanoparticle

    (d)

    Bulk particle

  5. __________ 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

  6. Best example for applications. of nano technology

    (a)

    Chemical industry

    (b)

    Engineering

    (c)

    medicine

    (d)

    all of these

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

    (a)

    5%

    (b)

    7%

    (c)

    25%

    (d)

    50%

  8. 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

  9. Zno is an example of __________

    (a)

    Bulk solid

    (b)

    Nano solid

    (c)

    Bulk solid and Nano solid

    (d)

    None of the above

  10. Bulk particles of nanoparticles are synthesized by ___________

    (a)

    Top - down approach

    (b)

    Bottom - up approach

    (c)

    Top - top approach

    (d)

    Bottom - real approach

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