HSSC-I (Class-11) Solved Physics MCQs; Unit-1: Measurements (Baluchistan Textbook Board, Quetta) With Verified Answers:


1. The main contribution of modern physics is




... Answer is D. Special theory of relativity
(a) Newton's laws of motion,(b) Thermodynamics laws. and (c) Kinetic theory are the contribution in classical Physics up to the end of the 19th century.


2. The branch of physics that deals with the properties and interaction of nuclear particles (protons and neutrons) is called




... Answer is C. Nuclear physics
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3. The fundamental physical quantities which form the basis of the SI units are




... Answer is B. Mass, length, and time
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4. Which one of the following is the basic physical quantity?




... Answer is B. Temperature
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5. Which list of units contains three base quantities and two derived quantities?




... Answer is A.  Kelvin, newton, second, kilogram, ohm
Kelvin, second, and kilogram are the three base quantities, while newton and ohm are the two derived quantities


6. Light year is the unit of




... Answer is B. Distance
a unit of astronomical distance equivalent to the distance that light travels in one year, which is 9.4607 × 1012 km (nearly 6 million miles).


7. μmｘmm is equal to :




... Answer is D. 10⁻⁹ m²
10⁻⁶ m x 10⁻³ m = 10⁻⁹ m²


8. The derived unit joule in terms of base units is




... Answer is B. kg m² s⁻²
Given: W(Joule) = F x d = ma x d = kg m² s⁻²


9. The scientific notation of a measured value 0.0092 m




... Answer is B. 9.2 ｘ10⁻³ m
By Applying the rules of scientific notation


10. By using Vernier calipers, the length of an object is measured by four students. Which one of the following is correct?




... Answer is B. 4.51 cm
The least count of the vernier caliper is 0.01 cm (two Decimal Places). The least count is the smallest measurement of a device. So 4.51 is the correct


11. What is the absolute precision of the referred result 8.52 cm.?




... Answer is C. 0.01 cm
The precision in the measurement is associated with the least count of the measuring instruments. the decimal point shows that 0.01 is the correct answer


12. The number of significant figures of the value 0.0202 is = 




... Answer is B.  Three
Follow the rules of significant figures


13. Which one of the following measurements is the most significant?




... Answer is D. 2.03 ｘ10⁵
Given: ------------------


14.  The length of a body is measured as 3.51 m, if the accuracy is 0.01 m, then the percentage uncertainty in the measurements is




... Answer is C. 0.28%
% uncertainty = ( Least count / Measured value) x 100 = (0.01 / 3.51) x 100 = 0.28%


15. The dimensions of the moment of inertia is




... Answer is B. [ML²T⁰]
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16.. Which pair of physical quantities have the same dimensions?




... Answer is D.  Work and potential energy
Work and potential energy have the same unit as Joule. So their dimensions are the same




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