CLASS – XI

Unit dimension measurement Part – 5

Significant figure: Significant figure are the number of digits upto which the accuracy is maintain. Rules of significant figure: (i) All non-zero digits are significant. For example, 1.235 has four significant figures. (ii) The zeros appearing between two non-zero digits are significant. For example, 4.025 has four significant figures. (iii) All the trailing zeros after […]

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Unit dimension measurement Part – 1

Dimension: All the physical quantities are derived from some fundamental quantities. Any physical quantity is expressed in terms of the product of different powers of the fundamental quantities. The exponent of fundamental quantities that represents the expression is called the dimension of that physical quantity. Consider a physical quantity speed = =  = length (time)-1

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