Question

A physical quantity may be defined as(A) the one having dimension.(B) that which is immeasurable.(C) that which has weight.(D) that which has mass.

Answer 1

Dear Student,

◆ Answer -

(A) the one having dimension.

● Explaination -

Physical quantity is a property of a material that can be quantified by measurement.

I'll explain options in brief.

• Definition of physical quantity requires it to be measurable, so option (B) is out.
• Lot of physical quantities like length, time neither have weight nor mass. Hence, option (C) and (D) are out.
• Therefore, only option left (A) is more appropriate than others.

*Note -

Some dimensionless quantities do exist. But where they are to be called physical quantities or not is again a controversy.

Thanks dear...

Answer 2

Answer:

(A) the one having dimension.

Explanation:

• A physical quantity is a material property that can only be quantified through measurement.
• A physical quantity is defined as a set of numerical values and a unit.
• For example, the properties of particles mass can be expressed as n kg, where n is the numerical value and kg is the unit.