Free Physics in Daily Life MCQs with Answers

111. What is unit of conductivity?

• A. Ohm
• B. Watt
• C. mho
• D. None of these

Explanation: Electrical conductivity is measured in siemens, formerly called mho, which is the reciprocal of resistance measured in ohms. Watt measures power, not conductivity.

112. Parses is a unit used to measure: __________?

• A. Distance
• B. Time
• C. Speed
• D. Force

Explanation: A parsec, apparently misspelled here as “parses,” is a unit of astronomical distance, equal to about 3.26 light-years. It is not a unit of speed or time.

113. Curie is a unit of measuring the intensity of ___________?

• A. Radioactivity
• B. Quantity of Heat
• C. Work or Energy
• D. Power

Explanation: The curie is an older unit of radioactivity, measuring the rate of radioactive decay. In the SI system, the corresponding unit is the becquerel.

114. Lux is a unit of __________?

• A. Luminous Flux
• B. Illumination
• C. Luminous Intensity
• D. Focus

Explanation: Lux measures illuminance, meaning the luminous flux falling on each square metre of a surface. Luminous flux is measured in lumens, while luminous intensity is measured in candelas.

115. The antiparticle of an electronic is _______?

• A. Positron
• B. Proton
• C. Alpha particular
• D. None of theseVitamins & Supplements

Explanation: The positron is the electron’s antiparticle: it has the same mass as an electron but a positive charge. A proton is a different, much more massive particle.

116. Dyne is the unit of?

• A. Force
• B. Pressure
• C. Velocity
• D. Momentum

Explanation: The dyne is the centimetre-gram-second unit of force, equal to the force that gives a 1-gram mass an acceleration of 1 centimetre per second squared. Pressure, velocity and momentum have different units.

117. Which instrument is used to measuring height above sea leve?

• A. Hygrometer
• B. Hypsometer
• C. Pyrometer
• D. Solometer

Explanation: A hypsometer determines elevation or height above sea level, traditionally from the boiling point of water, which changes with atmospheric pressure. A hygrometer measures humidity and a pyrometer measures high temperature.

118. Name the famous Pakistani scientist who worked under the supervision of Albert Einstein?

• A. Dr Abdul Qadeer
• B. Riazuddin Siddiqui
• C. Ammar Muhammadi
• D. Dr Abdul Salam

Explanation: Riazuddin Siddiqui was a Pakistani mathematician who worked under Albert Einstein. Abdul Salam was also a renowned Pakistani scientist, but this particular association belongs to Siddiqui.

119. Dioptre is used to measure?

• A. optical power
• B. luminous intensity
• C. power
• D. distance of heavenly bodies

Explanation: A dioptre is the unit of optical power and equals the reciprocal of focal length in metres. It is used for lenses, such as eyeglass lenses, rather than for ordinary mechanical power or distance.

120. Uncertainty Principle was given by?

• A. Werner Heisenberg
• B. Farady
• C. John locke
• D. None of these

Explanation: Werner Heisenberg proposed the uncertainty principle, which states that certain pairs such as a particle’s position and momentum cannot both be known with unlimited precision. Faraday is associated with electromagnetic induction, not this principle.