Recent Developments in Physics Book Back Questions & Answers
Unit 11 > Physics > Class 12 > Samacheer Kalvi - English Medium
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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
Correct answer: b) Nanomaterial
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2. Which one of the following is the natural nanomaterial.
a) Peacock feather
b) Peacock beak
c) Grain of sand
d) Skin of the Whale
Correct answer: a) Peacock feather
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3. The blue print for making ultra durable synthetic material is mimicked from
a) Lotus leaf
b) Morpho butterfly
c) Parrot fish
d) Peacock feather
Correct answer: c) Parrot fish
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4. The method of making nanomaterial by assembling the atoms is called
a) Top down approach
b) Bottom up approach
c) Cross down approach
d) Diagonal approach
Correct answer: b) Bottom up approach
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5. Ski wax is an application of nano product in the field of
a) Medicine
b) Textile
c) Sports
d) Automotive industry
Correct answer: c) Sports
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6. The materials used in Robotics are
a) Aluminium and silver
b) Silver and gold
c) Copper and gold
d) Steel and aluminum
Correct answer: d) Steel and aluminum
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7. 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
Correct answer: a) Shape memory alloys
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8. The technology used for stopping the brain from processing pain is
a) Precision medicine
b) Wireless brain sensor
c) Virtual reality
d) Radiology
Correct answer: c) Virtual reality
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9. The particle which gives mass to protons and neutrons are
a) Higgs particle
b) Einstein particle
c) Nanoparticle
d) Bulk particle
Correct answer: a) Higgs particle
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10. The gravitational waves were theoretically proposed by
a) Conrad Rontgen
b) Marie Curie
c) Albert Einstein
d) Edward Purcell
Correct answer: c) Albert Einstein