Question

01) The reference standard used for measurement of physical quantity is
a) quantity
c) number
b) unit.
d) systems of unit​

Answer 1

Answer:

(B) Dimension. (C) Constant. (D) Unit. Hint: Looking into the definition of each unit clearly says that it is an internationally accepted way to measure the physical quantities and hence called a reference standard.

Answer 2

Answer:

unit is the reference standard