CBSE Class 11-science - Significant Figures and Dimensions Videos

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• answer plz
  
• 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

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