NEET Physics Physical Quantities MCQ Question
Which of the following statements about physical quantities is correct?
Base quantities have units that are defined by arbitrary standards.
Derived units cannot be expressed in terms of base units.
All physical quantities can be added regardless of their dimensions.
The dimensions of a physical quantity must always be different for addition.
Correct Answer
Detailed Explanation
Base quantities such as length, mass, and time are defined by standard units, which are arbitrarily chosen but standardized. Derived units, on the other hand, are formed from base units and can be expressed as combinations of them. The other options reflect misconceptions about the relationships between physical quantities and their dimensions.
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