NEET PhysicsNCERT Class 11Physics and Measurement

Units and Measurement: NEET questions with solutions

NEET uses this chapter for quick marks on significant figures, rounding of computed results, percentage error in a product or quotient, and dimensional formulae. Marks are lost by counting leading zeros as significant, applying the significant-figure rule to a sum (or the decimal-place rule to a product), and believing that a dimensionally consistent equation must be correct.

Revise first: NCERT notes for Units and Measurement

Questions

10 questions · answers after you pick

1A student records the thickness of a sheet as 0.020500 m. How many significant figures does this reading have?Significant figuresEasySingle correct 2Which pair of physical quantities has the same dimensional formula?Dimensions and dimensional formulaeEasySingle correct 3The SI system is built on seven base units. Which of the units named in statements I to IV are among those seven?The SI systemEasyStatement based 4The length and breadth of a rectangular tile are measured as 4.234 m and 1.05 m. Its area, reported with the correct number of significant…Arithmetic with significant figuresMediumSingle correct 5Three samples with masses 2.3 kg, 0.415 kg and 13.07 kg are placed together on a tray. Their total mass, written with the correct precision…Arithmetic with significant figuresMediumSingle correct 6The density of a metal cube is found from ρ = m/L³. The mass m is measured with a percentage error of 1% and the side L with a percentage…Uncertainty in calculated resultsMediumSingle correct 7Match each quantity in List I with its dimensional formula in List II.Dimensions and dimensional formulaeMediumMatch the following 8Can matching the dimensions of length, g and mass give the complete formula for a pendulum's period? Assess the Assertion (A) and Reason…Deducing relations by dimensionsMediumAssertion–Reason 9A small liquid drop vibrates when disturbed. Assume its frequency ν depends only on the surface tension S of the liquid (force per unit…Deducing relations by dimensionsHardSingle correct 10The speed of a body is given by v = αt + β/(t + γ), where t is time. For this equation to be dimensionally consistent, the dimensions of…Checking dimensional consistencyHardSingle correct

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