Miscellaneous Physics Part-1

Total Questions: 50

1. The branch of Physics that deals with the motion of very small particles is called : [R.A.S/R.T.S.(Pre) 2003]

Correct Answer: (c) Quantum Mechanics
Solution:Quantum Mechanics is the branch of physics that deals with the motion of very small particles.

2. Geodesy is the science that deals with : [67th B.P.S.C. (Pre) 2022]

Correct Answer: (e) None of the above/More than one of the above.
Solution:Geodesy is the science of accurately measuring and understanding three fundamental properties of the Earth : its geometric shape, its orientation in space, and its gravity field - as well as the changes of these properties with time.

3. The field of science which studies automation and communication between human and machine is called- [R.A.S/R.T.S. (Pre) 1999]

Correct Answer: (d) Cybernetics
Solution:Cybernetics is relevant to the study of systems, such as mechanical, physical, biological, cognitive, and social systems. Cybernetics is applicable where action by the system generates some change in its environment and that change is reflected in that system. Norbert Wiener defined Cybernetics in 1948 as "the scientific study of control and communication in the animal and machine."

4. Science of time measurement is: [R.A.S/R.T.S. (Pre) 1999]

Correct Answer: (a) Horology
Solution:
  • Horology is the art or science of measuring time.
  • Cosmology: This is the study of the universe as a whole, including its origin, evolution, and large-scale structure.
  • Tomography: This is a non-destructive imaging technique that creates cross-sectional views of an object from projections taken along multiple axes.
  • Hydrology: This is the study of the movement, distribution, and quality of water on Earth and other planets, including the hydrologic cycle 1 and water resources.

5. The study of friction and lubrication is- [R.A.S/R.T.S. (Pre) 1999]

Correct Answer: (d) Tribology
Solution:
  • Tribology is a branch of Mechanical Engineering and Material Science. It includes the study and application of the principles of friction and lubrication.
  • Cryogenics: This is the branch of physics that deals with the production and effects of very low temperatures.
  • Selenology: This is the branch of astronomy that deals with the study of the Moon, its physical features, origin, and evolution.
  • Horology: As we discussed earlier, this is the science of time measurement.

6. What are true about plasma state? [Chhattisgarh P.C.S. (Pre) 2022]

(i) Particles in this state are in ionic state.
(ii) Light in the LED bulb is related to plasma state.
(iii) Sunlight is also an example of plasma state.

Correct Answer: (c) (i) and (iii)
Solution:Plasma is often called 'the fourth state of matter', along with solid, liquid, and gas. It is a state of matter that is created when a gas is heated to extremely high temperatures. Hence, statement (i) is true.

It is the most abundant form of ordinary matter in the universe, mostly in stars (including the Sun). Hence, statement (iii) is also true.

Statement (ii) is incorrect as light in the LED bulb is not related to plasma state.

7. In which field of science, we will learn about White Dwarf? [R.A.S./R.T.S. (Pre) 2003]

Correct Answer: (a) Astronomy
Solution:White Dwarf is related to astronomy. It is also known as Degenerate Dwarf.

8. Which one of the following statements is incorrect? [R.A.S./R.T.S. (Pre) 2008]

Correct Answer: (b) The blue waves scatter more than violet waves of light so that the sky appears blue not violet.
Solution:The violet waves scatter more than blue waves of light. The main cause of the sky appearing blue is the highest scattering of violet, indigo, and blue colors. The rest of the options are correct.

9. National Physical Laboratory is situated in – [U.P. Lower Sub. (Pre) 2009]

Correct Answer: (a) New Delhi
Solution:National Physical Laboratory is situated  in New Delhi.

10. National Chemical Laboratory is situated at: [U.P. Lower Sub. (Mains) 2015]

Correct Answer: (c) Pune
Solution:The National Chemical Laboratory (CSIR-NCL) Pune was established in 1950 as a constituent laboratory of the Council of Scientific and Industrial Research (CSIR). CSIR-NCL is a science and knowledge-based research, development, and consulting organization.