Following topics are covered in this physics chapter 1 Measurement MCQs test taken from Chapter 1.
- Physical Quantities (Base + Derived Quantities + Supplementary units)
- SI international system of units
- Scientific Notation
- Conventions for indicating units
- Errors (Kinds of errors) (Random + Systematic + Human + Instrumental error)
- Significant Figures (Rules specially for zeros)
- Precision and Accuracy
- Uncertainty
- Assessment of uncertainty in result
- Dimension of different physical quantities
Q 1. Base Quantities are those quantities which
A) which are not defined in terms of other physical quantities
B) minimum number of quantities which can define all the other quantities
C) which are derived from other quantities
D) None of the above
Q 2. Which of the following could not be a possible set of base units in any system of units
A) Force, velocity and time
B) Force, acceleration and time
C) velocity, acceleration and time
D) velocity, acceleration and mass
Q 3. Which of the following could be a possible set of base units in any system of units
A) Force, velocity and acceleration
B) Force, acceleration and mass
C) velocity, distance and time
D) velocity, acceleration and distance
Q 4. Kind of units in SI system are
A) 2
B) 3
C) 7
D) None of the above
Q 5. Number of base units in SI system are
A) 2
B) 3
C) 7
D) None of the above
Q 6. Number of derived units in SI system are
A) 2
B) 3
C) 7
D) None of the above
Q 7. Number of supplementary units in SI system are
A) 2
B) 3
C) 7
D) None of the above
Q 8. Which of the following is a base quantity in SI system
A) Charge
B) Current
C) Force
D) None of the above
Q 9. Total plane angle at the boundary of a complete circle in radians is
A) 2\pi
B) 4\pi
C) 180
D) 360
Q 10. Total solid angle at the surface of sphere in steradians is
A) 2\pi
B) 4\pi
C) 180
D) 360
Q 11. In selecting a unit which of the following feature is important
A) invariability
B) availability
C) Both A and B
D) None of the above
Q 12. Which of the following units is defined in terms of human sensitivity
A) ampere
B) kilogram
C) candela
D) kelvin
Q 13. 1 km^{2}=
A) 100 m^{2}=
B) 1,000 m^{2}=
C) 1,000,000 m^{2}=
D) 100,000 m^{2}=
Q 14. 1 m^{3}=
A) 100 cm^{3}=
B) 10,000 cm^{3}=
C) 100,000 cm^{3}=
D) 1000,000 cm^{3}=
Q 15. A person is watching a movie and measuring the time period of second pendulum at the same time, his measured values are 2.20s, 1.95s, 1.85s, 2.15s, 1.90s 2.00s which type of error is involved in measurement?
A) personal error
B) random error
C) systematic error
D) Both A and B
Q 16. Which error is caused by inexperience.
A) random error
B) personal error
C) systematic error
D) None of the above
Q 17. Thickness of a pencil is 1st measured by Screw Guage(L.C 0.001cm) and then by Vernier Calipers(L.C 0.01cm). Which of the following statement is correct?
A) significant figures in both measurements are equal
B) significant figures in first measurement is one more than second one
C) significant figure in first measurement is one less than second measurement
D) Any of the above statement could be correct.
Q 18. A reading measured as 17.35 cm may lie anywhere between (Note: Assume there is not any error in the measurement)
A) 17.2 cm to 17.5 cm
B) 17.3 cm to 17.4 cm
C) 17.33 cm to 17.37 cm
D) 17.345 cm to 17.355 cm
Q 19. Number of significant figures in 1.0350 are
A) 2
B) 3
C) 4
D) 5
Q 20. Number of significant figures in 2.40 x 10^{6} are
A) 2
B) 3
C) 4
D) 5
Q 21. In 5000 m the number of significant figures are
A) 1
B) 3
C) 4
D) may vary from 1 to 4
Q 22. In 5.5 Km when converted into meters is 5500m the number of significant figures in 5500 m are
A) 1
B) 2
C) 3
D) may vary from 2 to 4
Q 23. Number of significant figures in 1760 kg if measured by using least count of 10 kg is
A) 2
B) 3
C) 4
D) may be 3 may be 4
Q 24. A pendulum completed 10 vibrations in 20.0 s the time period measured will have how many significant figures
A) 1
B) 2
C) 3
D) 4
Q 25. 71.75 will be rounded off up to 1 decimal place as
A) 71.7
B) 71.8
C) Both A and B are correct
D) None of the above
Q 26. If 31.25 is added to 3.5 the correct answer will be
A) 34.75
B) 34.30
C) 34.8
D) 34.80
Q 27. If length of pendulum and gravitational acceleration has 1% percentage uncertainty than uncertainty in time period of pendulum is
A) 0%
B) 1%
C) 2%
D) 4%
Q 28. The dimensions of light year are
A) L
B) T
C) LT^{-1}
D) LT
Q 29. The dimensions of gravitational constant G.
A) M^{-1}L^{2}T^{-2}
B) M^{-1}L^{3}T^{-2}
C) LT^{-2}
D) M^{-1}L^{2}T^{-3}
Q 30. The dimensions of Planks constant are
A) ML^{2}T^{-2}
B) MLT^{-1}
C) MLT^{-2}
D) None of the other options is correct
Q 31. The units of planks constant are
A) Js
B) Jm
C) J
D) None of the other options is correct
Q 32. The units of Gravitational constant are
A) Nmkg^{-2}
B) Nm^{2}kg^{-2}
C) Nmkg{-1}
D) None of the other options is correct
Q 33. The dimensions of Coulomb constant are
A) ML^{2}T^{-1}A^{-2}
B) ML^{2}T^{-2}A^{-3}
C) ML^{4}T^{-4}A^{-2}
D) ML^{2}T^{-2}A^{-2}
Q 34. The dimensions of potential difference are
A) ML^{3}T^{-3}A^{-2}
B) ML^{2}T^{-2}A^{-2}
C) ML^{2}T^{-3}A^{-2}
D) ML^{2}T^{-3}A^{-1}
Q 35. Units of viscosity are
A) Ns^{2}m^{-2}
B) Nsm^{-2}
C) Ns^{2}m^{-2}
D) Ns^{2}m^{-3}
Q 36. In multiplying or division
A) fractional uncertainties are used
B) percentage uncertainties are used
C) absolute uncertainties are used
D) Both A and B are correct
Q 37. In finding the average value
A) fractional uncertainties are used
B) percentage uncertainties are used
C) absolute uncertainties are used
D) Both A and B are correct
Q 38. If the uncertainty in the measurement of current is 3%, resistance is 5% and time is 1% the total uncertainty in the calculation of energy supplied is
A) 9%
B) 12%
C) 14%
D) 15%
Q 39. For simple pendulum if uncertainty in length is 0.5 % and gravitational acceleration is 1% the uncertainty in measuring time by such pendulum will be
A) 0.5%
B) 0.75 %
C) 1%
D) 1.5%
Q 40. If uncertainty in measuring time is 0.1 s by stop watch. The uncertainty in time period of pendulum (We used 25 vibrations)
A) 0.1 s
B) 0.2 s
C) 0.04s
D) 0.004s
Q 41. We have an exact cube (Assume every length of the cube is exactly equal) the uncertainty in its resistance is 3% and its length is 2% uncertainty in the calculation of resistivity of the medium of cube is
A) 3%
B) 5%
C) 7%
D) 9%
Q 42. 37.535 can be rounded off as to two decimal places
A) 37.53
B) 37.54
C) 37.55
D) Both A and B are correct
Q 43. 1.245 can be rounded off to two decimal placesas
A) 1.24
B) 1.25
C) 1.26
D) Both A and B are correct
Q 44. 7.2366 can be rounded off to three decimal places as
A) 7.236
B) 7.237
C) 7.246
D) Both A and B are correct
Q 45. 5.574 can be rounded off to two decimal places as
A) 5.56
B) 5.57
C) 5.58
D) Both A and B are correct
Q 46. From dimensional analysis correct formula cannot be derived if formula contains
A) Velocity
B) Length
C) Force
D) Angle
Q 47. A measurement with more number of significant figures will necessarily have
A) less fractional uncertainty
B) less absolute uncertainty
C) Both A and B are correct
D) None of the above is necessarily correct
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