NCERT/Class 11/Physics/Units and Measurement

Units and Measurement

Class 11 · Physics

80 questions30 easy33 medium17 hard

Sample Questions

Q1.The mass of a box is 2.30 kg. Two gold pieces of 20.15 g and 20.17 g are added. The total mass to correct significant figures is:

  • A2.34 kg
  • B2.3403 kg
  • C2.340 kg
  • D2.34032 kg

Q2.Which of the following is NOT a base unit in the SI system?

  • AKilogram
  • BAmpere
  • CNewton
  • DKelvin

Q3.The SI unit of the amount of substance is:

  • Agram
  • Bmole
  • Ckilogram
  • Dmolecule

Q4.The dimensional formula of acceleration is:

  • A[M L T^-1]
  • B[M^0 L T^-2]
  • C[M L^2 T^-2]
  • D[M^0 L^2 T^-2]

Q5.Which is the most precise device for measuring length among the following?

  • AMetre scale
  • BVernier callipers with 20 divisions on sliding scale
  • CScrew gauge with pitch 1 mm and 100 divisions
  • DOptical instrument measuring to wavelength of light

Q6.This is a sample question to preview what you'll get in the full practice test...

  • A. Option one
  • B. Option two
  • C. Option three
  • D. Option four
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Concepts Covered

Base and Derived UnitsDimensional AnalysisDimensional FormulaeOrder of MagnitudePrinciple of HomogeneityRounding OffSI UnitsSignificant FiguresUnit Conversion

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