Question

What is the difference between a fundamental quantity and a derived quantity?
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Answer 1

Fundamental Quantities are independent and don't depend upon other quantities for their measurement. On the other hand, derived quantities depend upon other fundamental quantities for their measurement. for example: Mass is a fundamental physical quantity. It's SI unit is Kg.

Answer 2

The quantities that do not depend on any other physical quantity for their measurements are known as fundamental quantities. There are only 7 physical quantities. And rest of all other quantities are derived quantities. Derived quantities are products and/or ratios of the fundamental quantities that exist in a system of units.

The seven fundamental quantities are :

Mass : Kilogram

Time : Second

Length : Meter

Temperature : Kelvin

Electric current : Ampere

Amount of substance : Mole

Luminous Intensity : Candela