jee_main_2025_28_jan_morning - Units and Measurements Topics

Master these core formulas and structures to solve almost any past paper question.

Sample Questions in this Chapter

QUESTION #21 Errors in Measurement
A tiny metallic rectangular sheet has length and breadth of 5 mathrm~mm and 2.5 mathrm~mm , respectively. Using a specially designed screw gauge which has pitch of 0.75 mathrm~mm and 15 divisions in the circular scale, you are asked to find the area of the sheet. In this measurement, the maximum fractional error will be fracmathrmx100 where mathrmx is ________.
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QUESTION #23 Dimensional Analysis
In a measurement, it is asked to find modulus of elasticity per unit torque applied on the system. The measured quantity has dimension of left[mathrmM^mathrmamathrmL^mathrmbmathrmT^mathrmcright] . If b = 3 , the value of c is
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JEE Physics: Waves (+15.5%) | Electrostatics: Concentric Shells (-29.7%) | Modern Physics: Photoelectric Clones (+34.2%) | Mathematics: Definite Integrals (+18.1%) | Chemistry: Coordination Splitting (-11.4%) | JEE Physics: Waves (+15.5%) | Electrostatics: Concentric Shells (-29.7%) | Modern Physics: Photoelectric Clones (+34.2%) | Mathematics: Definite Integrals (+18.1%) | Chemistry: Coordination Splitting (-11.4%)
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