|Class 11 Physics Units and Measurements||Dimensions of a Physical Quantity|
Dimensions of a Physical Quantity
Dimensions of a physical quantity are powers (exponents) to which base quantities are raised to represent that quantity. They are represented by square brackets around the quantity.
Examples, Volume = Length x Breadth x Height = [L] x [L] x [L] = [L]3 = [L3]
Force = Mass x Acceleration = [M][L]/[T]2 = [MLT-2]
Dimensions do not take into account the magnitude of a quantity