Then you must have table in your home. It has Length with the parameters like mas. The length is measured in units of Meter. Yes. Most of us wake up or try to wake up in the morning with help of alarm bell of clock. The clock tells us time in unit of seconds.

In many cases, the temperature is measured in units of kelvin, the other quantity like Luminous Intensity has unit candela, The electric current is measured in units of ampere and quantity of matter in moles.

Let us summarize what we have mentioned in above paragraphs: kilogram,, metre, second, kelvin, candela, ampere, mole. These 7 units are known as Fundamental units. Why fundamental units, because all these units are independent of each other.

There are 2 supplementary fundamental units also. One is radian and other steradian of quantities of plane angle and solid angle respectively.

Derived units:

Those units which are derived from fundamental units are known as derived units. It means they depend upon fundamental units. For example, units of area is metre square. Unit of speed is metre per second, unit of acceleration is metre per second square.

This is all about the difference between fundamental units and derive units.

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