What is the Difference between derived quantity and fundamental quantity?

Answer 1

The quantity which has only direction is called fundamental quantity.Example-Direct current.The quantity which has both magnitude and direction is called derived quantity.Example-Altranating current.

Answer 2

Derived quantities are quantities that are calculated from two or more measurements. Derived quantities cannot be measured directly. They can only be computed. Many derived quantities are calculated in physical science. Three examples are area, volume, and density.

Answer 3

In the SI system, there are two categories of unit: the Base Unit and the Derived Unit. There is no such category as 'fundamental unit'.

There are seven Base Units. These are: the metre, kilogram, second, ampere, kelvin, candela, and mole.

All other units are Derived Units, and these are combinations of Base Units, sometimes given special names. For example, the coulomb is a Derived Unit, and is equivalent to an ampere second, which are both Base Units..

Answer 4

Fundamental units cannot be derived right from any other one. kilo gram in no way is connected to second or metre or kelvin.

But derived is the one which has been got right from the fundamentals.

ex: density has unit kg / m^3

Here fundamental kg and m have been used.

Fundamental units are seven in number along with two supplementary.

They are kg, m, s, K, Cd, A, mol.

Supplementary are rad, Sr.

But derived are innumerable.

Comment SI doesn't use the term, 'fundamental'. Those units listed above are termed 'base' units. 'Supplementary' units are no longer used.