Question

what is meant by a unit of aphysical quantity ​

Answer 1

They are independent of each other and are expressed by writing the letter of the fundamental quantity in parentheses, e.g., Fundamental units of mass, length and time are [M], [L], [T] respectively. (ii) They are defined as those units which can be derived from fundamental units.

Answer 2

what is meant by a unit of aphysical quantity

Ans = unit of physical quantity is express as the standard reference for measurement of physical quantity .