MCQs of Physics 1st Year Chapter 1 Measurements

FSc Part 1 Measurements MCQs Online Test. The given Multiple Choice Questions (MCQs) with answers of Physics Part-I, FSc. | ICS Chapter No.1: Measurements are important and more conceptual for the exams, entry tests i.e., ECAT and MDCAT, and also imperative for interview of jobs.

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➤ Measurements - MCQs-1
➤ Measurements - MCQs-2
➤ Measurements - Short Questions-I
➤ Measurements - Short Questions-2
➤ Vectors and Equilibrium - MCQs

Chapter No.1: Measurements 
Online MCQs Test - 3

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1. The dimensions of weight are?
   1.   `[MLT^{-2}]`
   2.   `[LT^{-2}]`
   3.   `[ML^2T]`
   4.   `[LT^{-1}]`
2. The dimensions of density are?
   1.   `[M^2L^{-2}]`
   2.   None of these
   3.   `[ML^{-3}]`
   4.   `[ML^{-2}]`
3. Which of the following pairs of units are both SI base units?
   1.   Coulomb, degree Celsius
   2.   Coulomb, Kelvin
   3.   Ampere, degree Celsius
   4.   Ampere, Kelvin
4. The dimensions of `[\frac{1}{2}at^2]` are that of?
   1.   Velocity
   2.   Time
   3.   Force
   4.   Length
5. The %age uncertainty for V and I is 2% and 6% respectively. Hence total uncertainty in the value of `R=\frac{V}{I}` is?
   1.   3%
   2.   8%
   3.   4%
   4.   `\frac{1}{3}`%
6. Errors due to incorrect design of a device are called?
   1.   Random error
   2.   Systematic error
   3.   None of these
   4.   Physical error
7. `[LT^{-2}]` is determined formula for?
   1.   Acceleration
   2.   Momentum
   3.   Force
   4.   Velocity
8. The angle between two radii of a circle which cut off on the circumference an arc, equal in length to the radius, is?
   1.   `57.3^\circ`
   2.   `37.5^\circ`
   3.   `53.7^\circ`
   4.   None of these
9. As F=6`\pi\eta`rv. Dimensions of coefficient of viscosity `\eta`?
   1.   `[MLT^{-1}]`
   2.   `[ML]`
   3.   `[ML^{-1}T^{-1}]`
   4.   `[ML^{-2}T^{-1}]`
10. The dimensions of power are?
    1.   None of these
    2.   `[ML^2T^{-2}]`
    3.   `[MLT^{-1}]`
    4.   `[ML^2T^{-3}]`
11. The founder of mathematical physics is?
    1.   Aristotle
    2.   Euclid
    3.   Archimedes
    4.   Plato
12. What is the ratio `\mathbf {\frac{1\mu m}{Gm}}`?
    1.   `10^{-15}`
    2.   `10^{-3}`
    3.   `10^{-12}`
    4.   `10^{-9}`
13. The diameter of an atom is?
    1.   `10^{-12}`m
    2.   `10^{-5}`m
    3.   `10^{-10}` m
    4.   `10^{-15}`m
14. Dimensions of specific gravity?
    1.   None of these
    2.   `[MLT]`
    3.   `[ML^{-1}T]`
    4.   `[M^\circ L^\circ T^\circ]`
15. Period of audible sound waves is?
    1.   `8\times10^{-1}` sec
    2.   `1\times10^{-3}` sec
    3.   `4\times10^2` sec
    4.   `1\times10^3` sec
16. 1 femto = ___?
    1.   `10^{5}`
    2.   `10^{15}`
    3.   `10^{-15}`
    4.   `10^{-5}`
17. The diameter of a nucleus is?
    1.   `10^{-10}` m
    2.   `10^{-20}`m
    3.   `10^{-15}` m
    4.   `10^{-12}` m
18. Dimensions of refractive index?
    1.   None of these
    2.   `[ML^{-1}T^{-2}]`
    3.   `[MLT]`
    4.   `[M^\circ L^\circ T^\circ]`
19. Hahn discovered uranium fission in?
    1.   1935
    2.   1940
    3.   1938
    4.   1939
20. One exa is?
    1.   `10^{-15}`
    2.   `10^{-12}`
    3.   `10^{15}`
    4.   `10^{18}`
21. A metal sphere of radius r is dropped into a tank of water. As it sinks at speed v, it experiences a drag force F given by F=krv, where k is a constant. What are the SI units of k?
    1.   kg `ms^{-2}`
    2.   kg `m^{-1}s^{-1}`
    3.   kg `m^{-2}s^{-2}`
    4.   kg `m^2s^{-1}`
22. Which of the following scientists made some contributions to geometrical optics?
    1.   Archimedes
    2.   Plato
    3.   Euclid
    4.   None of these
23. Solid angle is ____ dimensional angle?
    1.   2 & 3
    2.   3
    3.   None of these
    4.   2
24. Which one of the following Muslim mathematician determined the earths’ circumference?
    1.   Al-Khwarizmi
    2.   Al-Beruni
    3.   None of these
    4.   Ibn-Sina
25. 73.650 rounded off up to one decimal is?
    1.   73.65
    2.   73.7
    3.   74.00
    4.   73.6
26. Which pair contains one vector and one scalar quantity?
    1.   Momentum : Velocity
    2.   Displacement : Acceleration
    3.   Force : Kinetic energy
    4.   Power : Speed
27. Dimensions of specific heat?
    1.   None of these
    2.   `[MLT^{-2}]`
    3.   `[L^2T^{-2}K^{-1}]`
    4.   `[L^2T^{-2}K]`
28. Which of the following could be measured in the same units as force?
    1.   Energy `\times` Distance
    2.   Momentum `\times` Distance
    3.   Energy / Distance
    4.   Energy / Time
29. The time of 30 vibrations of a simple pendulum recorded by a stopwatch accurate up to one both of a second, then uncertainty is?
    1.   0.003 s
    2.   0.0003 s
    3.   0.3 s
    4.   0.03 s
30. One peta is equal to?
    1.   `10^{9}`
    2.   `10^{-12}`
    3.   `10^{15}`
    4.   `10^{-15}`
31. Which of the following is a correct relation?
    1.   `1 mm = 10^{-4} m`
    2.   `1 dm = 10^2 cm`
    3.   `1 m = 10^{-3} cm`
    4.   None of these
32. Which quantity has different units from the other three?
    1.   The Young modulus`\times` Area
    2.   Density`\times` Volume`\times` Velocity
    3.   Rate of change of momentum
    4.   Weight
33. The solution of the problem `\frac{6\times10^{-8}}{3\times10^{-2}}` = is correct given by?
    1.   `2\times10^{-10}`
    2.   `2\times10^{-4}`
    3.   `2\times10^{-6}`
    4.   `2\times10^{-5}`
34. The period of the earth is equal to?
    1.   None of these
    2.   One astronomical day
    3.   One solar day
    4.   One lunar day
35. The error is constant for ____ error?
    1.   Random
    2.   All of these
    3.   Systematic
    4.   Random & systematic
36. The energy of a photon of light of frequency f is given by hf, where h is the Planck constant. What are the base units of h?
    1.   kg `m^2s^{-3}`
    2.   kg `m^2s^{-2}`
    3.   kg `m^2s^{-1}`
    4.   kg `ms^{-1}`
37. The diameter of the milky way is?
    1.   `10^{30}`m
    2.   `10^{25}` m
    3.   `10^{-30}`m
    4.   `10^{20}`m
38. Consider two lengths of `(10\pm0.1)` cm out `(20\pm0.1)` cm measured by a ruler, which is more accurate?
    1.   None of these
    2.   2nd
    3.   1st
    4.   Same
39. Symbolically solid angle is represented as?
    1.   Sr
    2.   `\theta`
    3.   Cd
    4.   Rad
40. For 0.0036 no. of significant digits?
    1.   1
    2.   3
    3.   4
    4.   2
41. In an experiment to determine the acceleration of free fall g, the period of oscillation T and length l of a simple pendulum were measured. The uncertainty in the measurement of l was estimated to be 4% and that of T, 1%. The value of g was determined using the formula:
    `g=\frac{4\pi^2l}{T^2}`
    What is the uncertainty in the calculated value for g?
    1.   5%
    2.   3%
    3.   2%
    4.   6%
42. Density of air is 1.2 `kg/m^3`. It can be expressed in `gm/cm^3` by?
    1.   `1.2\times10^{-6}`
    2.   `12\times10^{-4}`
    3.   `1.2\times10^{6}`
    4.   `12\times10^{3}`
43. For `1.40\times10^3`, no. of significant digits?
    1.   1
    2.   4
    3.   2
    4.   3
44. The circumference of the earth was determined by?
    1.   Bohr
    2.   Al-Beruni
    3.   Chadwick
    4.   Ibn-al-Haitham
45. For 2.450 no. of significant digits?
    1.   3
    2.   2
    3.   1
    4.   4