Question

what is the necessity of selecting some units is fundamental units ​

Answer 1

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➡️The number of physical units required to be measured is very large, If a separate unit is defined for each of them, then it will become very difficult to remember all of them as they as they will be quite unrelated to each other .

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Answer 2

Step-by-step explanation:

there is a large no of physical quantities in physics so if we take different unit for diffrent quantities then it is very difficult to manage and remember all unit so we use seven basic unit and physical quantities are connected each other so it is easy to represent all other units are represented in terms of Fundamental unit