Fundamental And Derived Quantities And Units - Practice Questions & MCQ

1) Fundamental Quantities

Those quantities which are independent of all other quantities and cannot be expressed in terms of other basic quantities.

These quantities are also called Absolute /basic quantities.

i.e. length, mass, time, electric current, temperature, amount of substance and luminous intensity

2) Derived Quantities

Derived Quantities are product and ratios of the fundamental quantities that exist in a system of units and these quantities can be expressed in terms of other basic quantities.

i.e. Area, Density, Force, Pressure, etc

So l= length of the square is fundamental quantity

But the area of square=A=l*l is Derived Quantity which we get with the help of taking a square of the length.

• Fundamental and derived units:-

Fundamental units:- The units of fundamental or basic quantities are called fundamental units or base units.

Derived units:- The units of those physical quantities which can be expressed as the combination of fundamental units are called derived units.