Question
Download Solution PDFWhich one of the following physical quantities is a vector quantity?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFCONCEPT:
- All measurable quantities are divided into two broad categories:
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Scalar quantities |
Vector quantities |
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The physical quantities which have only magnitude and no direction are called scalar quantities or scalars. |
The physical quantities which have both magnitude and direction and obey the laws of vector addition are called vector quantities or vectors. |
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A scalar quantity can be specified by a single number, along with the proper unit. |
A vector quantity is specified by a number with a unit and its direction. |
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Examples: Mass, volume, density, time, temperature, electric current, distance, Energy, speed, etc. |
Examples Displacement, velocity, force, weight, torque, momentum, acceleration, velocity, etc |
EXPLANATION:
- The dipole moment is the product of charge and the distance between them.
- It is a vector quantity. Therefore option 4 is correct.
- The rate of flow of charge is called electric current.
- It is a scalar quantity.
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Power (P): It is defined as the rate at which work is done.
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It is a scalar quantity.
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- The gravitational potential energy of a body is the energy associated with it due to its position in the gravitational field of another body and is measured by the amount of work done in bringing a body from infinity to a given point in the gravitational field of the other.
- It is a scalar quantity because work is not a vector quantity.
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