Question
Download Solution PDFWhich one of the following physical quantities is a scalar quantity?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFCONCEPT:
- Scalar quantities: The physical quantities which have only magnitude and no direction are called scalar quantities or scalars.
- A scalar quantity can be specified by a single number, along with the proper unit.
- Examples: Mass, volume, density, time, temperature, electric current, Luminious intensity, etc.
- Vector quantities: The physical quantities which have both magnitude and direction and obey the laws of vector addition are called vector quantities or vectors.
- A vector quantity is specified by a number with a unit and its direction.
- Examples Displacement, velocity, force, momentum, etc.
EXPLANATION:
- The dipole moment is the product of charge and the distance between them. It is a vector quantity.
- The moment of linear momentum is called angular momentum. It is a vector quantity.
- The moment of force is called torque. It is a vector quantity.
- The rate of flow of charge is called electric current. It is a scalar quantity. So option 4 is correct.
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