NEET Physics / AI question bank / NCERT Class 11 / Physics 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.
Also called: dimensional analysis · errors in measurement · significant figures
Questions
10 questions / answers after you pick
- Q1A student records the thickness of a sheet as 0.020500 m. How many significant figures does this reading have?
Significant figuresEasySingle correct
- Q2Which pair of physical quantities has the same dimensional formula?
Dimensions and dimensional formulaeEasySingle correct
- Q3The 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
- Q4The 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
- Q5Three 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
- Q6The 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
- Q7Match each quantity in List I with its dimensional formula in List II.
Dimensions and dimensional formulaeMediumMatch the following
- Q8Can 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
- Q9A 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
- Q10The 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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