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

 

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