Question

If a quantity has no dimensions then,

• A. It may have a unit
• B. Such quantities does not exist
• C. Can never have a unit
• D. none of the above

Answer 1

The correct option is A It may have a unit

A quantity has no dimension means that the quantity may be the ratio of same physical quantities. For example, the angular displacement is the ratio of lengths but it has some unit, called radian.