Question

difination of dimensionnal formula and eqution

Answer 1

The dimensional formula is defined as the expression of the physical quantity in terms of its basic unit with proper dimensions. For example, dimensional force is. F = [M L T-2] It's because the unit of Force is N or kg*m/s2.

An equation obtained by equating a physical quantity with its dimensional formula is called the dimensional equation of the physical quantity.

the dimensional formula of an quantity is expressed in terms of seven fundamental physical quantities.

the seven fundamental physical quantities are mass kg e time second length metre temperature Kelvin current ampere luminous intensity candela amount of substance mole.

any physical quantity other than these seven are called derived quantities.