1st Year Physics Chapter 1 Measurement MCQs with Answers

On this page, you can get the 1st Year Physics Chapter 1 Measurement MCQs with Answers. In this chapter, the importance of physics and measurement of the quantities are illustrated. Physics is actually the study of the Entire Physical World. To describe the physical world, there are Base Quantities and Derived Quantities. The whole world has adopted the International System of Units. While measuring, some errors occur i.e. Random and Systematic Errors. Two different terms, Precision, and Accuracy are defined in this Chapter. Significant figures, Scientific notation, and Dimensions of Physical Quantities are also discussed in the Chapter. So, this is the best source to get important MCQs online.

1st Year Physics Chapter 1 Measurement MCQs with Answers

KEY POINTS

Question#1. Which one is not a branch of physical sciences?

• Chemistry
• Astronomy
• Geology
• Biology

Question#2. The dimension of energy density is the same as that of?

• Pressure
  
• Force
• (Velocity)²
• Acceleration

Question#3. Which property of a solid object cannot be changed by the application of force?

• Length
• Mass
  
• Area
• Speed

Question#4. For what physical quantity is the pascal a unit?

• Stress
• Pressure
• Young’s modulus
• All of these

Question#5. In scientific notation, numbers are expressed in?

• Power of ten
  
• Powers of two
• Reciprocal
• Decimal

Question#6. 1024 can be written in scientific notation as?

• 1.024 x 10³
• 2¹⁰
• 0.000976
• 1/0.00097

Question#7. Prefix deca represents?

• 10¹
• 10²
• 10³
• 10^-1

Question#8. The error in measurement may occur due to?

• Inexperience of a person
• The faulty apparatus
• Inappropriate method
• Due to all reasons in a, b and c

Question#9. The uncertainty in measurement may occur due to?

• Limitation of an instrument
• Natural variation of the object to be measured
• Inadequate of technique
• All given in a, b and c

Question#10. Random error can be reduced by?

• Taking zero correction
• Comparing the instrument with another more accurate one
• Taking mean of several measurements
• All methods explain in a, b and c

Question#11. In any measurement the significant figures are?

• All accurately known and all doubtful digits
• Only accurately known digits
• Only doubtful digits
• All accurately known digits and the first doubtful

Question#12. A digit zero in a measurement?

• May be significant may not significant
• Always significant
• Always insignificant
• Significant only if left to a significant figure

Question#13. The number of significant figures in 0.0173 are?

• Three
• Four
• Five
• Two

Question#14. Smaller the least count of the instrument more is the measurement?

• Accurate
• Precise
• Accurate and Precise
• None of these

Question#15. Which system of the units is a coherent system of units in mechanics?

• CGS
• MKS
• FPS
• All of these

Question#16. ML^-1T^-2 is the dimension of?

• Force
• Pressure
  
• Momentum
• Energy

Question#17. Dimensional analysis is helpful for?

• Deriving a possible formula
• Checking the homogeneity of a physical equation
• Verification of laws
• Only a and b are correct

Question#18. Which equation is not dimensionally correct?

• E=mc²
• Vf=Vi+at
• S=Vt²
• S=1/2 at²

Question#19. SI unit of coefficient of viscosity is?

• kg.m.s^-1
• kg.m^-1.s^-1
• kg.m.s
• kg^-1m^-1s^-1

Question#20. Three students measured length of needle with meter rod and recorded as: (i) 0.2145m (ii) 0.21m (iii) 0.214m. Which one is a correct record?

• Only (i)
• Only (ii)
• Only (iii)
• Both (i) and (ii)

Question#21. One light-year is equal to?

• 9.5×10¹⁵m
• 9.5×10¹⁵sec
• 9.5×10¹⁵km
• 9.5×10¹⁵cm

Question#22. Absolute uncertainty in a measurement depends upon?

• The magnitude of the measurement
• Least count of the instrument
• The percentage error in the measurement
• System of unit

Question#23. Steradian is the SI unit of?

• Plane angle
• Solid angle
• Both plane angle and solid angle
• Neither plane angle nor solid angle

Question#24. Which pair has the same dimension?

• work, torque
• Work, energy
• Energy, torque
• All are correct

Question#25. Total uncertainty, in the result obtained from the subtraction of two measurements, is equal to?

• Sum of their absolute uncertainties
• The difference of their absolute uncertainties
• Product of their absolute uncertainties
• Division of their absolute uncertainties

Question#26. Which one is the highest power multiple?

• Giga
• Peta
  
• Mega
• Deca

Question#27. One femto stands for?

• 10^-15
• 10^-12
• 10^-9
• 10^-6

Question#28. Percentage uncertainty in radius r is 2%. The percentage uncertainty in the volume of a sphere is?

• 4%
• 6%
• 8%
• 9%

Question#29. The unit of force is _______ and its symbol is ________ . Which is the correct pair?

• Newton, n
• Newton, N
• newton, n
• newton, N

Question#30. Which of the following length is more precise measured by the instrument having least count of 0.00001cm? (1) 5cm (2) 5.00cm (3) 5.000cm (4) 5.00000cm.

• 1
• 2
• 3
• 4

Question#31. Which one is the derived quantity in SI units?

• Electric current
• Electric charge
• Plane angle
• Amount of substance

Question#32. Which one is the correct representation of the unit of pressure?

• Newton / Meter²
• newton / meter²
• Newton / meter²
• newton / Meter²

Question#33. Which one is the dimensionally correct equation?

• f=vt
• S=Vit + ½ at²
• V=St
• V=f/t

Question#34. Zero error of the instrument is a type of?

• Random error
• Personal error
• Systematic error
• Classified error

Question#35. In multiplication and division of measurement?

• Percentage uncertainties are added?
• Absolute uncertainties are added
• Percentage uncertainties are divided
• Absolute uncertainties are divided

Question#36. The number of significant figures in 5.400 are?

• Three
• Five
• Two
• None

Question#37. To reduce the uncertainty in the timing experiment?

• Use the highly precise instrument
• Conduct at room temperature
• Count number of vibration
• Both a and c

Question#38. The number of significant figures in the length of a bar 9800mm measured by meter rod is?

• Four
  
• Three
• Two
• None of these

Question#39. A wire when heated shows a 2% increase in length. The increase in the cross-section area would be?

• 1%
• 2%
• 4%
• 8%

Question#40. Which of the following is not a correct representation method of prefixes?

• 1mm
• 10km
• 1000 μ
• Both a and b