Question
What do you understand by dimensional formula and dimensional equation?
Solution
Dimensional formula of a physical quantity is an expression which tells us:
i) the fundamental units on which the quantity depends on, and
ii) the nature of dependence.
For example, dimensional formula of area is [M0L2T0].
This expression tells us that area does not depend upon mass and time but unit of length is required twice.
Dimensional equation: Physical quantity whebn equated with dimensional formula becomes dimensional equation.
i.e. dimensional equation of area will be given as,
A = [M0L2T0]
