CBSE Class 11science  Significant Figures and Dimensions Videos
Units and Measurement
This video explains significant figures, rules to identify significant figures and rounding off uncertain digits.

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 the dimension of stopping potential vo in photoelectric effect in units of plank's constant 'h',speed of light 'c' and gravitational constant 'G' and ampereA
 In physics if 2 quantities are dimensionless then their dimensional formula are equal?
 frequency of vibration (n) of a stretched string depends on its length (l) , tension (t) and linear mass density taking proportionality constant k=½ find a relation between them
 Calculate the wave number of a wave with a frequency of 6.2 *10^7
 The respective number of significant figures for the numbers 23.023; 0.0003 and 2.1´10^{3} are (a) 4, 4, 2 (b) 5, 1, 2 (c) 5, 1, 5 (d) 5, 5, 2
 signify digit of 0.7048
 For class 12 physics cbse board will they ask us dimensional formula for anything?will there be questions expected as to write the dimensional formulas?
 if the unit of length and mass be doubled then the numerical value of w. r. t present value of universal gravitational constant will become