Free Measurements MCQs with Answers

161. Who enriched the heritage of science with number and decimal system?

• A. Indians
• B. Chinese
• C. Arabs
• D. Egyptians

Explanation: Aryabhata, the mathematician and astronomer known for his contributions to mathematics and the decimal system, hailed from India. His work and achievements occurred in ancient India, specifically during the 5th and 6th centuries, which significantly enriched the heritage of science, particularly in the fields of mathematics and astronomy.

162. Who added precious knowledge of Astronomy to science?

• A. Euclid
• B. Ptolmey
• C. Thales
• D. Archimedes

Explanation: Among the options provided, Ptolemy stands out as the individual who significantly added precious knowledge to the field of astronomy with his geocentric model, which influenced astronomical thought for many centuries.

163. Who improved upon the calculations of the orbits of the Moon and certain planets?

• A. Al-Beruni
• B. Abu Abdullah Muhammad Ibn Jabir Al-Battani
• C. Al-Khawrizimi
• D. Jabir Bin Hayyan

Explanation: Among the options, B) Abu Abdullah Muhammad Ibn Jabir Al-Battani stands out for his significant improvements in calculations related to the orbits of the Moon and certain planets, making substantial contributions to astronomy during his time.

164. Omar Khayyam was expert in:

• A. Physics
• B. Chemistry
• C. Mathematics
• D. None of the above

Explanation: Khayyam was a highly skilled mathematician who made significant contributions to algebra and geometry. He worked on solutions to cubic equations and developed a geometrical method for solving these equations.

165. If length = 0.233m and width 0.178m, the most accurate area expressed in terms of significant figures is:

• A. 0.0391m2
• B. 0.041563m2
• C. 0.041474m2
• D. 0.041m2

Explanation: By using formulae Area= length BreadthArea=Length Breadth = 0.233m×0.178mArea = 0.041474 m²

166. Physics can be defined as the study of:

• A. Chemical properties of matter
• B. Physical properties of matter
• C. Relation between matter and energy
• D. Both b & c

Explanation: Physics deals with the physical properties of matter and interaction between matter and energy.

167. Prior to 1900 AD physics comprised of:

• A. Mechanics, Sound, Light, Heat, Magnetism and Electricity
• B. Sound, Light, Nuclear physics, Heat, Plasma physics and Mechanics
• C. Astrophysics, Light, Heat, magnetism, Electricity and Sound
• D. All of these

Explanation: Prior to 1900 AD, physics comprised classical mechanics, optics, thermodynamics, electricity and magnetism, wave and sound studies, and the development of atomic theory.

168. Physics can be defined as a branch of science based on:

• A. Observation and analysis of facts
• B. Experimental observation and quantitative measurement
• C. Mathematical calculation and interpretation
• D. Replication and verification of known facts

Explanation: In summary, option B ("Experimental observation and quantitative measurement") aligns most closely with the essence of experimental physics. It emphasizes the significance of conducting experiments, making observations, and quantitatively measuring physical phenomena to gather empirical data, which forms the foundation for theories and principles in physics. The other options, while important in their own right, are not as directly related to the core idea of experimental observation and quantitative measurement in the context of physics.

169. The branch of physics deals with study of production propagation & properties of sound waves is called:

• A. Magnetics
• B. Optics
• C. Statics
• D. Acoustics

Explanation: Acoustics is the study of sound, covering its generation, transmission, and effects on various mediums and organisms, including humans.

170. If 0.61 is added to 167 with due regard to significant figures, then we get:

• A. 168
• B. 167
• C. 167.61
• D. 167.6

Explanation: In terms of significant figures, when adding 0.61 to 167:167 + 0.61 = 167.61The number 0.61 has two significant figures, and 167 has three significant figures. When adding these numbers together, the least number of decimal places in the original numbers determines the precision of the result.Therefore, considering significant figures, the result of adding 0.61 to 167 would be 167.61.